Chemical Bonding and Molecular Structure

243 questions · Chemistry · JEE Main

Chemical Bonding and Molecular Structure

243 questions · Chemistry · JEE Main

Among $SO_{2}, NF_{3}, NH_{3}, XeF_{2}, ClF_{3}$ and $SF_{4}$ , the hybridization of the molecule with nonzero dipole moment and highest number of lone-pairs of electrons on the central atom is2025 · 2 Apr · Shift 1 · Q14 · MCQ
Consider the following molecules: The correct order of rate of hydrolysis is : Includes diagram2025 · 2 Apr · Shift 1 · Q20 · MCQ
A molecule with the formula $AX_{4} Y$ has all it's elements from p-block. Element A is rarest, monoatomic, non-radioactive from its group and has the lowest ionization enthalpy value among $A, X$ and Y .…2025 · 2 Apr · Shift 1 · Q8 · MCQ
Which among the following molecules is (a) involved in $sp^{3} d$ hybridization, (b) has different bond lengths and (c) has lone pair of electrons on the central atom?2025 · 2 Apr · Shift 2 · Q5 · MCQ
Given below are two statements: Statement I : Wet cotton clothes made of cellulose based carbohydrate takes comparatively longer time to get dried than wet nylon polymer based clothes. Statement II : Intermolecular hydrogen bonding with…2025 · 3 Apr · Shift 2 · Q1 · MCQ
Given below are two statements. In the light of the above statements, choose the correct answer from the options given below: Includes diagram2025 · 4 Apr · Shift 1 · Q10 · MCQ
Which of the following molecule(s) show/s paramagnetic behavior? A. $O_{2}$ B. $N_{2}$ C. $F_{2}$ D. $S_{2}$ E. $Cl_{2}$ Choose the correct answer from the options given below:2025 · 4 Apr · Shift 1 · Q17 · MCQ
Given below are two statements: Statement (I): For , all three possible structures may be drawn as follows. Statement (II): Structure III is most stable, as the orbitals having the lone pairs are axial, where the lp – bp repulsion is… Includes diagram2025 · 4 Apr · Shift 2 · Q1 · MCQ
Match the List I with List II. Choose the correct answer from the options given below: Includes table2025 · 7 Apr · Shift 1 · Q6 · MCQ
In $S O_{2}$ , $N O_{2}$ $-$ and $N_{3}$ $-$ , the hybridizations at the central atom are respectively :2025 · 7 Apr · Shift 2 · Q5 · MCQ
Given below are two statements : Statement (I) : is more polar than Statement (II) : Boiling point of is lower than but it is more polar than . In the light of the above statements, choose the most appropriate answer from the options given… Includes diagram2025 · 7 Apr · Shift 2 · Q9 · MCQ
The number of molecules/ions that show linear geometry among the following is . $SO_{2}, BeCl_{2}, CO_{2}, N_{3}^{-}, NO_{2}, F_{2} O, XeF_{2}, NO_{2}^{+}, I_{3}^{-}, O_{3}$ …2025 · 22 Jan · Shift 1 · Q21 · Numerical
Arrange the following compounds in increasing order of their dipole moment : $HBr, H_{2} S, NF_{3}$ and $CHCl_{3}$ 2025 · 22 Jan · Shift 2 · Q9 · MCQ
Match the List - I with List - II Choose the correct answer from the options given below: Includes table2025 · 23 Jan · Shift 1 · Q2 · MCQ
Which of the following linear combination of atomic orbitals will lead to formation of molecular orbitals in homonuclear diatomic molecules [internuclear axis in $z$ -direction] ? A. $2 p_{z}$ and $2 p_{x}$ …2025 · 24 Jan · Shift 1 · Q10 · MCQ
Which of the following statement is true with respect to $H_{2} O, NH_{3}$ and $CH_{4}$ ? A. The central atoms of all the molecules are $sp^{3}$ hybridized. B. The $H - O - H, H - N - H$ …2025 · 24 Jan · Shift 1 · Q13 · MCQ
Given below are two statements : Statement (I) : Experimentally determined oxygen-oxygen bond lengths in the $O_{3}$ are found to be same and the bond length is greater than that of a $O = O$ (double bond) but less…2025 · 24 Jan · Shift 2 · Q16 · MCQ
Consider ' n ' is the number of lone pair of electrons present in the equatorial position of the most stable structure of $ClF_{3}$ . The ions from the following with ' n ' number of unpaired electrons are A. $V^{3 +}$ B. $Ti^{3 +}$ …2025 · 28 Jan · Shift 1 · Q14 · MCQ
The molecules having square pyramidal geometry are2025 · 28 Jan · Shift 1 · Q19 · MCQ
Total number of non-bonded electrons present in $N O_{2}$ $-$ ion based on Lewis theory is .2025 · 29 Jan · Shift 2 · Q21 · Numerical
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): $PH_{3}$ has lower boiling point than $NH_{3}$ . Reason (R) : In liquid state $NH_{3}$ molecules…2024 · 1 Feb · Shift 1 · Q14 · MCQ
Arrange the bonds in order of increasing ionic character in the molecules. $LiF$ , $K_{2} O, N_{2}, SO_{2}$ and $ClF_{3}$ :2024 · 1 Feb · Shift 1 · Q20 · MCQ
The number of molecules/ion/s having trigonal bipyramidal shape is . $PF_{5}, BrF_{5}, PCl_{5}, [Pt Cl_{4}]^{2 -}, BF_{3}, Fe (CO)_{5}$ 2024 · 1 Feb · Shift 1 · Q26 · Numerical
The lowest oxidation number of an atom in a compound $A_{2} B$ is -2 . The number of electrons in its valence shell is .2024 · 1 Feb · Shift 1 · Q27 · Numerical
Given below are two statements : Statement (I) : A $π$ bonding MO has lower electron density above and below the inter-nuclear axis. Statement (II) : The $π^{*}$ antibonding MO has a node between the nuclei. In the light of the above…2024 · 1 Feb · Shift 2 · Q17 · MCQ
Select the compound from the following that will show intramolecular hydrogen bonding.2024 · 1 Feb · Shift 2 · Q20 · MCQ
Number of molecules/ions from the following in which the central atom is involved in $sp^{3}$ hybridization is . $NO_{3}^{-}, BCl_{3}, ClO_{2}^{-}, ClO_{3}^{-}$ 2024 · 4 Apr · Shift 1 · Q11 · MCQ
Which one of the following molecules has maximum dipole moment?2024 · 4 Apr · Shift 1 · Q18 · MCQ
Number of molecules/species from the following having one unpaired electron is . $O_{2}, O_{2}^{- 1}, NO, CN^{- 1}, O_{2}^{2 -}$ 2024 · 4 Apr · Shift 1 · Q29 · Numerical
The correct statement/s about Hydrogen bonding is/are A. Hydrogen bonding exists when $H$ is covalently bonded to the highly electro negative atom. B. Intermolecular $H$ bonding is present in $o$ -nitro phenol C. Intramolecular $H$ …2024 · 4 Apr · Shift 2 · Q11 · MCQ
The number of species from the following that have pyramidal geometry around the central atom is $S_{2} O_{3}^{2 -}, SO_{4}^{2 -}, SO_{3}^{2 -}, S_{2} O_{7}^{2 -}$ 2024 · 4 Apr · Shift 2 · Q14 · MCQ
Number of compounds / species from the following with non-zero dipole moment is . $BeCl_{2}, BCl_{3}, NF_{3}, XeF_{4}, CCl_{4}, H_{2} O, H_{2} S, HBr, CO_{2}, H_{2}, HCl$ …2024 · 4 Apr · Shift 2 · Q22 · Numerical
In the lewis dot structure for $NO_{2}^{-}$ , total number of valence electrons around nitrogen is .2024 · 5 Apr · Shift 1 · Q26 · Numerical
Number of $σ$ and $π$ bonds present in ethylene molecule is respectively :2024 · 5 Apr · Shift 1 · Q9 · MCQ
Match List I with List II. Choose the correct answer from the options given below : Includes table2024 · 5 Apr · Shift 2 · Q2 · MCQ
Number of compounds from the following with zero dipole moment is . $HF, H_{2}, H_{2} S, CO_{2}, NH_{3}, BF_{3}, CH_{4}, CHCl_{3}, SiF_{4}, H_{2} O, BeF_{2}$ …2024 · 5 Apr · Shift 2 · Q30 · Numerical
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : $NH_{3}$ and $NF_{3}$ molecule have pyramidal shape with a lone pair of electrons on nitrogen atom.…2024 · 5 Apr · Shift 2 · Q9 · MCQ
Match List I with List II Choose the correct answer from the options given below: Includes table2024 · 6 Apr · Shift 1 · Q11 · MCQ
Match List I with List II Choose the correct answer from the options given below: Includes table2024 · 6 Apr · Shift 1 · Q12 · MCQ
Number of molecules from the following which can exhibit hydrogen bonding is . (nearest integer) Includes diagram2024 · 6 Apr · Shift 1 · Q28 · Numerical
Consider the following reactions The number of protons that do not involve in hydrogen bonding in the product B is . Includes diagram2024 · 6 Apr · Shift 2 · Q20 · Numerical
Total number of species from the following with central atom utilising $sp^{2}$ hybrid orbitals for bonding is . $NH_{3}, SO_{2}, SiO_{2}, BeCl_{2}, C_{2} H_{2}, C_{2} H_{4}, BCl_{3}, HCHO, C_{6} H_{6}, BF_{3}, C_{2} H_{4} Cl_{2}$ …2024 · 6 Apr · Shift 2 · Q29 · Numerical
Number of molecules from the following which are exceptions to octet rule is . $CO_{2}, NO_{2}, H_{2} SO_{4}, BF_{3}, CH_{4}, SiF_{4}, ClO_{2}, PCl_{5}, BeF_{2}, C_{2} H_{6}, CHCl_{3}, CBr_{4}$ …2024 · 8 Apr · Shift 1 · Q27 · Numerical
Match List I with List II Choose the correct answer from the options given below: Includes table2024 · 8 Apr · Shift 1 · Q8 · MCQ
Number of molecules having bond order 2 from the following molecules is . $C_{2}, O_{2}, Be_{2}, Li_{2}, Ne_{2}, N_{2}, He_{2}$ 2024 · 8 Apr · Shift 2 · Q30 · Numerical
The shape of carbocation is :2024 · 8 Apr · Shift 2 · Q6 · MCQ
When $ψ_{A}$ and $ψ_{B}$ are the wave functions of atomic orbitals, then $σ^{*}$ is represented by :2024 · 8 Apr · Shift 2 · Q7 · MCQ
In which one of the following pairs the central atoms exhibit $sp^{2}$ hybridization ?2024 · 9 Apr · Shift 1 · Q10 · MCQ
The total number of species from the following in which one unpaired electron is present, is . $N_{2}, O_{2}, C_{2}^{-}, O_{2}^{-}, O_{2}^{2 -}, H_{2}^{+}, CN^{-}, He_{2}^{+}$ …2024 · 9 Apr · Shift 1 · Q25 · Numerical
The correct increasing order for bond angles among $BF_{3}, PF_{3}$ and $ClF_{3}$ is :2024 · 9 Apr · Shift 2 · Q13 · MCQ
Total number of electrons present in $(π^{*})$ molecular orbitals of $O_{2}, O_{2}^{+}$ and $O_{2}^{-}$ is .2024 · 9 Apr · Shift 2 · Q24 · Numerical
Sum of bond order of CO and NO $^{+}$ is .2024 · 27 Jan · Shift 1 · Q29 · Numerical
Choose the polar molecule from the following:2024 · 27 Jan · Shift 1 · Q9 · MCQ
The number of non-polar molecules from the following is . $HF, H_{2} O, SO_{2}, H_{2}, CO_{2}, CH_{4}, NH_{3}, HCl, CHCl_{3}, BF_{3}$ …2024 · 27 Jan · Shift 2 · Q26 · Numerical
The difference in energy between the actual structure and the lowest energy resonance structure for the given compound is2024 · 29 Jan · Shift 1 · Q11 · MCQ
The number of species from the following which are paramagnetic and with bond order equal to one is . $H_{2}, He_{2}^{+}, O_{2}^{+}, N_{2}^{2 -}, O_{2}^{2 -}, F_{2}, Ne_{2}^{+}, B_{2}$ …2024 · 29 Jan · Shift 1 · Q25 · Numerical
Number of compounds with one lone pair of electrons on central atom amongst following is . $O_{3}, H_{2} O, SF_{4}, ClF_{3}, NH_{3}, BrF_{5}, XeF_{4}$ 2024 · 29 Jan · Shift 1 · Q28 · Numerical
The total number of molecules with zero dipole moment among $CH_{4}, BF_{3}, H_{2} O, HF, NH_{3}, CO_{2}$ and $SO_{2}$ is .2024 · 29 Jan · Shift 2 · Q21 · Numerical
The total number of anti bonding molecular orbitals, formed from $2 s$ and $2 p$ atomic orbitals in a diatomic molecule is .2024 · 29 Jan · Shift 2 · Q26 · Numerical
Aluminium chloride in acidified aqueous solution forms an ion having geometry2024 · 30 Jan · Shift 1 · Q1 · MCQ
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : There is a considerable increase in covalent radius from $N$ to $P$ . However from As to Bi only a…2024 · 30 Jan · Shift 1 · Q19 · MCQ
The total number of molecular orbitals formed from $2 s$ and $2 p$ atomic orbitals of a diatomic molecule is .2024 · 30 Jan · Shift 1 · Q21 · Numerical
Match List I with List II. Choose the correct answer from the options given below : Includes table2024 · 30 Jan · Shift 1 · Q9 · MCQ
Given below are two statements: Statement - I: Since Fluorine is more electronegative than nitrogen, the net dipole moment of $NF_{3}$ is greater than $NH_{3}$ . Statement - II: In $NH_{3}$ , the orbital dipole due to…2024 · 30 Jan · Shift 2 · Q6 · MCQ
The molecule / ion with square pyramidal shape is2024 · 30 Jan · Shift 2 · Q9 · MCQ
The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals A. have the same energy B. have the minimum overlap C. have same symmetry about the molecular axis D. have different…2024 · 31 Jan · Shift 1 · Q13 · MCQ
The number of species from the following in which the central atom uses $sp^{3}$ hybrid orbitals in its bonding is . $NH_{3}, SO_{2}, SiO_{2}, BeCl_{2}, CO_{2}, H_{2} O, CH_{4}, BF_{3}$ …2024 · 31 Jan · Shift 1 · Q30 · Numerical
Which of the following is least ionic?2024 · 31 Jan · Shift 2 · Q12 · MCQ
A diatomic molecule has a dipole moment of $1.2 D$ . If the bond distance is $1 A^{\circ}$ , then fractional charge on each atom is $\times 1 0^{- 1}$ esu. (Given $1 D = 1 0^{- 18}$ esucm)2024 · 31 Jan · Shift 2 · Q22 · Numerical
$O - O$ bond length in $H_{2} O_{2}$ is $\underline{X}$ than the $O - O$ bond length in $F_{2} O_{2}$ . The $O - H$ bond length in $H_{2} O_{2}$ …2023 · 1 Feb · Shift 2 · Q1 · MCQ
The number of species from the following which have square pyramidal structure is $PF_{5}, BrF_{4}^{-}, IF_{5}, BrF_{5}, XeOF_{4}, ICl_{4}^{-}$ 2023 · 6 Apr · Shift 1 · Q16 · Numerical
Match List I with List II Choose the correct answer from the options given below: Includes table2023 · 6 Apr · Shift 1 · Q7 · MCQ
The number of species having a square planar shape from the following is . $XeF_{4}, SF_{4}, SiF_{4}, BF_{4}^{-}, BrF_{4}^{-}, [Cu (NH_{3})_{4}]^{2 +}, [FeCl_{4}]^{2 -}, [PtCl_{4}]^{2 -}$ …2023 · 6 Apr · Shift 2 · Q16 · Numerical
In an ice crystal, each water molecule is hydrogen bonded to neighbouring molecules.2023 · 6 Apr · Shift 2 · Q21 · Numerical
The number of following factors which affect the percent covalent character of the ionic bond is (A) Polarising power of cation (B) Extent of distortion of anion (C) Polarisability of the anion (D) Polarising…2023 · 8 Apr · Shift 1 · Q16 · Numerical
The number of species from the following carrying a single lone pair on central atom Xenon is . $XeF_{5}^{+}, XeO_{3}, XeO_{2} F_{2}, XeF_{5}^{-}, XeO_{3} F_{2}, XeOF_{4}, XeF_{4}$ …2023 · 8 Apr · Shift 2 · Q14 · Numerical
The compound which does not exist is2023 · 10 Apr · Shift 1 · Q1 · MCQ
The number of bent-shaped molecule/s from the following is N $_{3}^{-}$ , NO $_{2}^{-}$ , I $_{3}^{-}$ , O $_{3}$ , SO $_{2}$ 2023 · 10 Apr · Shift 1 · Q16 · Numerical
The sum of lone pairs present on the central atom of the interhalogen IF $_{5}$ and IF $_{7}$ is 2023 · 10 Apr · Shift 1 · Q18 · Numerical
The number of molecules from the following which contain only two lone pair of electrons is $H_{2} O, N_{2}, CO, XeF_{4}, NH_{3}, NO, CO_{2}, F_{2}$ …2023 · 10 Apr · Shift 2 · Q13 · Numerical
Match List - I with List - II: Choose the correct answer from the options given below: Includes table2023 · 11 Apr · Shift 1 · Q5 · MCQ
The maximum number of lone pairs of electrons on the central atom from the following species is . $ClO_{3}^{-}, XeF_{4}, SF_{4}$ and $I_{3}^{-}$ 2023 · 11 Apr · Shift 2 · Q16 · Numerical
The bond order and magnetic property of acetylide ion are same as that of2023 · 12 Apr · Shift 1 · Q4 · MCQ
In which of the following processes, the bond order increases and paramagnetic character changes to diamagnetic one ?2023 · 13 Apr · Shift 1 · Q1 · MCQ
$ClF_{5}$ at room temperature is a:2023 · 13 Apr · Shift 1 · Q6 · MCQ
Given below are two statements : Statement I : $SO_{2}$ and $H_{2} O$ both possess V-shaped structure. Statement II : The bond angle of $SO_{2}$ is less than that of $H_{2} O$ . In the…2023 · 13 Apr · Shift 2 · Q8 · MCQ
Consider the following statements: (A) $N F_{3}$ molecule has a trigonal planar structure. (B) Bond length of $N_{2}$ is shorter than $O_{2}$ . (C) Isoelectronic molecules or ions have identical bond order. (D) Dipole moment…2023 · 15 Apr · Shift 1 · Q10 · MCQ
The number of $P - O - P$ bonds in $H_{4} P_{2} O_{7}, (HPO_{3})_{3}$ and $P_{4} O_{10}$ are respectively :2023 · 15 Apr · Shift 1 · Q4 · MCQ
Order of Covalent bond; A. $KF > KI; LiF > KF$ B. $KF < KI; LiF > KF$ C. $SnC l_{4} > SnC l_{2}; CuCl > NaCl$ D. $LiF > KF; CuCl < NaCl$ E. $KF < KI; CuCl > NaCl$ Choose the…2023 · 24 Jan · Shift 1 · Q11 · MCQ
Decreasing order of the hydrogen bonding in following forms of water is correctly represented by A. Liquid water B. Ice C. Impure water Choose the correct answer from the options given below :2023 · 24 Jan · Shift 1 · Q3 · MCQ
What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species : $N_{2}; N_{2}^{+}; O_{2}; O_{2}^{+}$ ?2023 · 24 Jan · Shift 2 · Q3 · MCQ
The total number of lone pairs of electrons on oxygen atoms of ozone is .2023 · 25 Jan · Shift 1 · Q23 · Numerical
Statement I : Dipole moment is a vector quantity and by convention it is depicted by a small arrow with tail on the negative centre and head pointing towards the positive centre. Statement II : The crossed arrow of the dipole moment…2023 · 25 Jan · Shift 2 · Q9 · MCQ
The number of molecules or ions from the following, which do not have odd number of electrons are . (A) NO $_{2}$ (B) ICl $_{4}^{-}$ (C) BrF $_{3}$ (D) ClO $_{2}$ (E) NO $_{2}^{+}$ (F) NO2023 · 29 Jan · Shift 1 · Q15 · Numerical
The magnetic behaviour of $L i_{2} O, N a_{2} O_{2}$ and $K O_{2}$ , respectively, are :2023 · 29 Jan · Shift 1 · Q2 · MCQ
The bond dissociation energy is highest for2023 · 29 Jan · Shift 1 · Q5 · MCQ
According to MO theory the bond orders for $O_{2}^{2 -}$ , $CO$ and $N O^{+}$ respectively, are2023 · 29 Jan · Shift 2 · Q5 · MCQ
Match List I with List II Choose the correct answer from the options given below : Includes table2023 · 30 Jan · Shift 1 · Q13 · MCQ
For $OF_{2}$ molecule consider the following : A. Number of lone pairs on oxygen is 2 . B. FOF angle is less than $104. 5^{\circ}$ . C. Oxidation state of $O$ is $- 2$ . D. Molecule is bent ' $V$ ' shaped. E. Molecular…2023 · 30 Jan · Shift 1 · Q9 · MCQ
Match List I with List II Choose the correct answer from the options given below : Includes table2023 · 31 Jan · Shift 1 · Q15 · MCQ
Amongst the following, the number of species having the linear shape is . $XeF_{2}, I_{3}^{+}, C_{3} O_{2}, I_{3}^{-}, CO_{2}, SO_{2}, BeCl_{2}$ …2023 · 31 Jan · Shift 2 · Q16 · Numerical
The correct order of bond orders of $C_{2}^{2 -}$ , $N_{2}^{2 -}$ and $O_{2}^{2 -}$ is, respectively2022 · 24 Jun · Shift 2 · Q3 · MCQ
Among the following species $N_{2}, N_{2}^{+}, N_{2}^{-}, N_{2}^{2 -}, O_{2}, O_{2}^{+}, O_{2}^{-}, O_{2}^{2 -}$ the number of species showing diamagnesim is …2022 · 25 Jul · Shift 1 · Q12 · Numerical
Match List I with List II: Choose the correct answer from the options given below: Includes table2022 · 25 Jul · Shift 2 · Q1 · MCQ
The sum of number of lone pairs of electrons present on the central atoms of $X e O_{3}$ , $X e O F_{4}$ and $X e F_{6}$ , is 2022 · 25 Jul · Shift 2 · Q18 · Numerical
Bonding in which of the following diatomic molecule(s) become(s) stronger, on the basis of MO Theory, by removal of an electron? (A) $N O$ (B) $N_{2}$ (C) $O_{2}$ (D) $C_{2}$ (E) $B_{2}$ Choose the most appropriate answer from the options given…2022 · 25 Jun · Shift 1 · Q1 · MCQ
Number of electron deficient molecules among the following $P H_{3}$ , $B_{2} H_{6}$ , $C C l_{4}$ , $N H_{3}$ , $L i H$ and $B C l_{3}$ is2022 · 25 Jun · Shift 1 · Q3 · MCQ
Amongst $B e F_{2}$ , $B F_{3}$ , $H_{2} O$ , $N H_{3}$ , $C C l_{4}$ and $H C l$ , the number of molecules with non-zero net dipole moment is .2022 · 25 Jun · Shift 2 · Q17 · Numerical
Match List-I with List-II : Choose the correct answer from the options given below : Includes table2022 · 26 Jul · Shift 1 · Q1 · MCQ
Arrange the following in increasing order of their covalent character. A. $CaF_{2}$ B. $CaCl_{2}$ C. $CaBr_{2}$ D. $CaI_{2}$ Choose the correct answer from the options given below.2022 · 26 Jul · Shift 2 · Q2 · MCQ
Consider the ions/molecule O $_{2}^{+}$ , $O_{2}$ , O $_{2}^{-}$ , O $_{2}^{2 -}$ For increasing bond order the correct option is :2022 · 26 Jun · Shift 1 · Q3 · MCQ
Amongst $S F_{4}$ , $X e F_{4}$ , $C F_{4}$ and $H_{2} O$ , the number of species with two lone pairs of electrons is .2022 · 26 Jun · Shift 2 · Q17 · Numerical
Amongst the following, the number of oxide(s) which are paramagnetic in nature is $Na_{2} O, KO_{2}, NO_{2}, N_{2} O, ClO_{2}, NO, SO_{2}, Cl_{2} O$ …2022 · 27 Jul · Shift 1 · Q16 · Numerical
According to MO theory, number of species/ions from the following having identical bond order is . $CN^{-}, NO^{+}, O_{2}, O_{2}^{+}, O_{2}^{2 +}$ 2022 · 27 Jul · Shift 1 · Q18 · Numerical
Given below are two statements. Statement I: $O_{2}, Cu^{2 +}$ , and $Fe^{3 +}$ are weakly attracted by magnetic field and are magnetized in the same direction as magnetic field. Statement II: $NaCl$ and $H_{2} O$ …2022 · 27 Jul · Shift 1 · Q2 · MCQ
The number of molecule(s) or ion(s) from the following having non-planar structure is . $NO_{3}^{-}, H_{2} O_{2}, BF_{3}, PCl_{3}, XeF_{4}, SF_{4}, XeO_{3}, PH_{4}^{+}, SO_{3}, [Al (OH)_{4}]^{-}$ …2022 · 27 Jul · Shift 2 · Q19 · Numerical
Match List - I with List - II. Choose the correct answer from the options given below : Includes table2022 · 27 Jul · Shift 2 · Q2 · MCQ
Based upon VSEPR theory, match the shape (geometry) of the molecules in List-I with the molecules in List-II and select the most appropriate option. Includes table2022 · 27 Jun · Shift 1 · Q2 · MCQ
Identify the incorrect statement for $P C l_{5}$ from the following.2022 · 27 Jun · Shift 2 · Q1 · MCQ
The correct order of increasing intermolecular hydrogen bond strength is :2022 · 27 Jun · Shift 2 · Q2 · MCQ
The number of paramagnetic species among the following is . $B_{2}, Li_{2}, C_{2}, C_{2}^{-}, O_{2}^{2 -}, O_{2}^{+}$ and $He_{2}^{+}$ 2022 · 28 Jul · Shift 1 · Q15 · Numerical
The number of interhalogens from the following having square pyramidal structure is : $ClF_{3}, IF_{7}, BrF_{5}, BrF_{3}, I_{2} Cl_{6}, IF_{5}, ClF, ClF_{5}$ 2022 · 28 Jul · Shift 1 · Q19 · Numerical
The hybridization of P exhibited in $P F_{5}$ is spxdy. The value of y is .2022 · 28 Jun · Shift 1 · Q16 · Numerical
In the structure of $S F_{4}$ , the lone pair of electrons on S is in.2022 · 28 Jun · Shift 2 · Q3 · MCQ
Which of the following pair of molecules contain odd electron molecule and an expanded octet molecule?2022 · 29 Jul · Shift 1 · Q1 · MCQ
Number of lone pairs of electrons in the central atom of $SCl_{2}, O_{3}, ClF_{3}$ and $SF_{6}$ , respectively, are :2022 · 29 Jul · Shift 1 · Q5 · MCQ
Consider, $PF_{5}, BrF_{5}, PCl_{3}, SF_{6}, [ICl_{4}]^{-}, ClF_{3}$ and $IF_{5}$ . Amongst the above molecule(s)/ion(s), the number of molecule(s)/ion(s) having $sp^{3} d^{2}$ …2022 · 29 Jul · Shift 2 · Q16 · Numerical
Consider the species $C H_{4}$ , NH $_{4}^{+}$ and BH $_{4}^{-}$ . Choose the correct option with respect to the these species.2022 · 29 Jun · Shift 2 · Q2 · MCQ
Number of lone pair(s) of electrons on central atom and the shape $B r F_{3}$ molecule respectively, are2022 · 29 Jun · Shift 2 · Q6 · MCQ
Amongst the following, the number of molecule/(s) having net resultant dipole moment is . $N F_{3}$ , $B F_{3}$ , $B e F_{2}$ , $C H C l_{3}$ , $H_{2} S$ , $S i F_{4}$ , $C C l_{4}$ , $P F_{5}$ 2022 · 30 Jun · Shift 1 · Q16 · Numerical
Number of paramagnetic oxides among the following given oxides is . $L i_{2} O$ , $C a O$ , $N a_{2} O_{2}$ , $K O_{2}$ , $M g O$ and $K_{2} O$ 2021 · 1 Sep · Shift 2 · Q13 · MCQ
The spin-only magnetic moment value of $B_{2}^{+}$ species is $\times$ 10 $-$ 2 BM. (Nearest integer) [Given : $3$ = 1.73]2021 · 1 Sep · Shift 2 · Q21 · Numerical
Given below are two statements : one is labeled as Assertion A and the other is labelled as Reason R : Assertion A : The H $-$ O $-$ H bond angle in water molecule is 104.5 $^{\circ}$ . Reason R : The lone pair - lone pair repulsion of…2021 · 16 Mar · Shift 1 · Q2 · MCQ
A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is :2021 · 17 Mar · Shift 1 · Q11 · MCQ
Amongst the following, the linear species is :2021 · 17 Mar · Shift 2 · Q4 · MCQ
AX is a covalent diatomic molecule where A and X are second row elements of periodic table. Based on Molecular orbital theory, the bond order of AX is 2.5. The total number of electrons in AX is . (Round off to…2021 · 18 Mar · Shift 1 · Q15 · Numerical
The number of species below that have two lone pairs of electrons in their central atom is . (Round off to the Nearest Integer). $S F_{4}$ , BF $_{4}^{-}$ , $C l F_{3}$ , $A s F_{3}$ , $P C l_{5}$ , $B r F_{5}$ , $X e F_{4}$ , $S F_{6}$ 2021 · 18 Mar · Shift 2 · Q16 · Numerical
The number of lone pairs of electrons on the central I atom in I $_{3}^{-}$ is .2021 · 20 Jul · Shift 1 · Q12 · Numerical
The hybridisations of the atomic orbitals of nitrogen in NO $_{2}^{-}$ , NO $_{2}^{+}$ and NH $_{4}^{+}$ respectively are.2021 · 20 Jul · Shift 2 · Q10 · MCQ
Match List-I with List-II : Choose the correct answer from the options given below : Includes table2021 · 22 Jul · Shift 2 · Q7 · MCQ
Which of the following are isostructural pairs ? A. $S O_{4}^{2 -}$ and $C r O_{4}^{2 -}$ B. $S i C l_{4}$ , and $T i C l_{4}$ C. $N H_{3}$ and $N O_{3}^{-}$ D. $B C l_{3}$ and $B r C l_{3}$ 2021 · 24 Feb · Shift 1 · Q3 · MCQ
The correct shape and $I - I - I$ bond angles respectively in $I_{3}^{-}$ ion are :2021 · 24 Feb · Shift 2 · Q12 · MCQ
The correct set from the following in which both pairs are in correct order of melting point is :2021 · 24 Feb · Shift 2 · Q6 · MCQ
Among the following, the number of halide(s) which is/are inert to hydrolysis is . (A) $B F_{3}$ (B) $S i C l_{4}$ (C) $P C l_{5}$ (D) $S F_{6}$ 2021 · 25 Feb · Shift 1 · Q22 · Numerical
According to molecular orbital theory, the species among the following that does not exist is :2021 · 25 Feb · Shift 1 · Q9 · MCQ
Which among the following species has unequal bond lengths?2021 · 25 Feb · Shift 2 · Q4 · MCQ
In the following the correct bond order sequence is :2021 · 25 Jul · Shift 2 · Q1 · MCQ
Identify the species having one $π$ -bond and maximum number of canonical forms from the following :2021 · 25 Jul · Shift 2 · Q9 · MCQ
$A B_{3}$ is an interhalogen T-shaped molecule. The number of lone pairs of electrons on A is . (Integer answer)2021 · 26 Aug · Shift 1 · Q13 · Numerical
The bond order and magnetic behaviour of $O_{2}^{-}$ ion are respectively :2021 · 26 Aug · Shift 2 · Q2 · MCQ
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Dipole-dipole interactions are the only non-covalent interactions, resulting in hydrogen bond formation. Reason R :…2021 · 26 Feb · Shift 1 · Q6 · MCQ
Match List - I with List - II. Choose the correct answer from the options given below : Includes table2021 · 26 Feb · Shift 2 · Q1 · MCQ
Match List - I with List - II : Choose the most appropriate answer from the options given below : Includes diagram2021 · 27 Aug · Shift 1 · Q3 · MCQ
Match items of List-I with those of List-II : Choose the most appropriate answer from the options given below : Includes table2021 · 27 Aug · Shift 1 · Q4 · MCQ
The number of species having non-pyramidal shape among the following is . (A) $S O_{3}$ (B) NO $_{3}^{-}$ (C) $P C l_{3}$ (D) CO $_{3}^{2 -}$ 2021 · 27 Aug · Shift 2 · Q21 · Numerical
The difference between bond orders of CO and NO $^{\oplus}$ is $\frac{x}{2}$ where x = . (Round off to the Nearest Integer)2021 · 27 Jul · Shift 1 · Q22 · Numerical
The total number of electrons in all bonding molecular orbitals of $O_{2}^{2 -}$ is . (Round off to the nearest integer)2021 · 27 Jul · Shift 2 · Q17 · Numerical
The number of hydrogen bonded water molecule(s) associated with stoichiometry $C u S O_{4} .5 H_{2} O$ is .2021 · 31 Aug · Shift 1 · Q18 · Numerical
According to molecular orbital theory, the number of unpaired electron(s) in $O_{2}^{2 -}$ is :2021 · 31 Aug · Shift 2 · Q20 · Numerical
If $A B_{4}$ molecule is a polar molecule, a possible geometry of $A B_{4}$ is2020 · 2 Sep · Shift 1 · Q17 · MCQ
The molecular geometry of $S F_{6}$ is octahedral. What is the geometry of $S F_{4}$ (including lone pair(s) of electrons, if any)?2020 · 2 Sep · Shift 2 · Q10 · MCQ
Match the type of interaction in column A with the distance dependence of their interaction energy in column B Includes table2020 · 2 Sep · Shift 2 · Q12 · MCQ
The shape / structure of $[X e F_{5}]^{-}$ and $X e O_{3} F_{2}$ , respectively, are2020 · 2 Sep · Shift 2 · Q8 · MCQ
Of the species, $N O$ , $N O^{+}$ , $N O_{2}^{+}$ and $N O^{-}$ , the one with minimum bond strength is :2020 · 3 Sep · Shift 1 · Q17 · MCQ
The intermolecular potential energy for the molecules A, B, C and D given below suggests that : Includes diagram2020 · 4 Sep · Shift 1 · Q12 · MCQ
The reaction in which the hybridisation of the underlined atom is affected is :2020 · 4 Sep · Shift 2 · Q21 · MCQ
The potential energy curve for the $H_{2}$ molecule as a function of internuclear distance is :2020 · 5 Sep · Shift 1 · Q18 · MCQ
The structure of $P C l_{5}$ in the solid state is :2020 · 5 Sep · Shift 1 · Q5 · MCQ
The compound that has the largest H–M–H bond angle (M = N, O, S, C) is :2020 · 5 Sep · Shift 2 · Q15 · MCQ
The number of Cl = O bonds in perchloric acid is, "".2020 · 6 Sep · Shift 1 · Q1 · Numerical
Chlorine reacts with hot and concentrated NaOH and produces compounds (X) and (Y). Compound (X) gives white precipitate with silver nitrate solution. The average bond order between CI and O atoms in (Y) is.2020 · 7 Jan · Shift 1 · Q1 · Numerical
The dipole of $C C l_{4}$ , $C H C l_{3}$ and $C H_{4}$ are in the order :2020 · 7 Jan · Shift 1 · Q10 · MCQ
The relative strength of interionic/intermolecular forces in decreasing order is :2020 · 7 Jan · Shift 1 · Q13 · MCQ
The bond order and the magnetic characteristics of $C N^{-}$ are :2020 · 7 Jan · Shift 2 · Q12 · MCQ
Arrange the following bonds according to their average bond energies in descending order : C–Cl, C–Br, C–F, C–I2020 · 8 Jan · Shift 2 · Q18 · MCQ
If the magnetic moment of a dioxygen species is 1.73 B.M, it may be :2020 · 9 Jan · Shift 1 · Q3 · MCQ
The number of sp2 hybrid orbitals in a molecule of benzene is :2020 · 9 Jan · Shift 2 · Q11 · MCQ
Among the following molecules / ions, $C_{2}^{2 -}, N_{2}^{2 -}, O_{2}^{2 -}, O_{2}$ which one is diamagnetic and has the shortest bond length?2019 · 8 Apr · Shift 2 · Q13 · MCQ
The covalent alkaline earth metal halide (X = Cl, Br, I) is :2019 · 8 Apr · Shift 2 · Q16 · MCQ
The ion that has sp3d2 hybridization for the central atom, is :2019 · 8 Apr · Shift 2 · Q21 · MCQ
The correct statement about $I C l_{5}$ and $I C l_{4}^{-}$ is2019 · 8 Apr · Shift 2 · Q6 · MCQ
Among the following, the molecule expected to be stabilized by anion formation is : $C_{2}$ , $O_{2}$ , $N O$ , $F_{2}$ 2019 · 9 Apr · Shift 1 · Q12 · MCQ
Among the following species, the diamagnetic molecule is2019 · 9 Apr · Shift 2 · Q11 · MCQ
HF has highest boiling point among hydrogen halides, because it has :2019 · 9 Apr · Shift 2 · Q18 · MCQ
According to molecular orbital theory, which of the following is true with respect to $L i_{2}^{+}$ and $L i_{2}$ $-$ ?2019 · 9 Jan · Shift 1 · Q18 · MCQ
In which of the following process, the bond order has increased and paramagnetic character has charged to diamagnetic ?2019 · 9 Jan · Shift 2 · Q17 · MCQ
The oxoacid of sulphur that does not contain bond between sulphur atoms is2019 · 10 Apr · Shift 1 · Q1 · MCQ
During the change of $O_{2}$ to $O_{2}^{-}$ , the incoming electron goes to the orbital :2019 · 10 Apr · Shift 1 · Q5 · MCQ
The type of hybridisation and number of lone pair (s) of electrons of Xe in $X e O F_{4}$ , respectively, are:2019 · 10 Jan · Shift 1 · Q12 · MCQ
Two pi and half sigma bonds are present in :2019 · 10 Jan · Shift 1 · Q18 · MCQ
The pair that contains two P – H bonds in each of the oxoacids is2019 · 10 Jan · Shift 2 · Q10 · MCQ
The correct statement among the following is :2019 · 12 Apr · Shift 1 · Q2 · MCQ
The decreasing order of bond angles in $B F_{3}$ , $N H_{3}$ , $P F_{3}$ and $I_{3}^{-}$ is :2018 · 15 Apr · Shift 1 · Q12 · MCQ
Identify the pair in which the geometry of the species is $T$ -shape and square - pyraidal, respectively :2018 · 15 Apr · Shift 1 · Q15 · MCQ
In the molecular orbital diagram for the molecular ion, $N_{2}^{+}$ , the number of electrons in the $σ$ 2pz molecular orbital is :2018 · 15 Apr · Shift 1 · Q19 · MCQ
In hydrogen azide (above) the bond orders of bond (I) and (II) are : Includes diagram2018 · 15 Apr · Shift 1 · Q9 · MCQ
Which of the following best describes the diagram below of a molecular orbital ? Includes diagram2018 · 15 Apr · Shift 2 · Q6 · MCQ
The incorrect geometry is represented by :2018 · 16 Apr · Shift 1 · Q14 · MCQ
Which of the following conversions involves change in both shape and hybridisation ?2018 · 16 Apr · Shift 1 · Q18 · MCQ
Which of the following compounds contain(s) no covalent bond(s)? $K C l$ , $P H_{3}$ , $O_{2}$ , $B_{2} H_{6}$ , $H_{2} S O_{4}$ 2018 · Shift 0 · Q14 · MCQ