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Chemistry · 2023 · 31 Jan · Shift 2

22 questions from this JEE Main paper

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2023 · 31 Jan · Shift 2
Chemistry

Chemistry · 2023 · 31 Jan · Shift 2

22 questions from this JEE Main paper

Some Basic Concepts of Chemistry3 questions Aldehydes Ketones and Carboxylic Acids2 questions Alcohols Phenols and Ethers1 questions Compounds Containing Nitrogen1 questions Periodic Table and Periodicity2 questions Solutions1 questions Structure of Atom1 questions Practical Organic Chemistry1 questions Hydrocarbons1 questions P Block Elements1 questions Haloalkanes and Haloarenes1 questions Ionic Equilibrium2 questions Chemical Bonding and Molecular Structure1 questions Thermodynamics1 questions Electrochemistry1 questions Coordination Compounds1 questions Chemical Kinetics and Nuclear Chemistry1 questions

Q1.When a hydrocarbon A undergoes complete combustion it requires 11 equivalents of oxygen and produces 4 equivalents of water. What is the molecular formula of $A$ ?
Chemistry · Some Basic Concepts of Chemistry · MCQ
Q2.Cyclohexylamine when treated with nitrous acid yields $(P)$ . On treating $(P)$ with $PCC$ results in (Q). When $(Q)$ is heated with dil. $NaOH$ we get $(R)$ The final product (R) is :
Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ
Q3.Compound $A, C_{5} H_{10} O_{5}$ , given a tetraacetate with $Ac_{2} O$ and oxidation of $A$ with $Br_{2} - H_{2} O$ gives an acid, $C_{5} H_{10} O_{6}$ …
Chemistry · Alcohols Phenols and Ethers · MCQ
Q4.An organic compound $[A] (C_{4} H_{11} N)$ , shows optical activity and gives $N_{2}$ gas on treatment with $HNO_{2}$ . The compound $[A]$ reacts with $PhSO_{2} Cl$ …
Chemistry · Compounds Containing Nitrogen · MCQ
Q5.Which of the following elements have half-filled f-orbitals in their ground state? (Given : atomic number $Sm = 62; Eu = 63; Tb = 65; Gd = 64, Pm = 61$ ) A. $Sm$ B. Eu C. $Tb$ D. Gd E.…
Chemistry · Periodic Table and Periodicity · MCQ
Q6.Evaluate the following statements for their correctness. A. The elevation in boiling point temperature of water will be same for $0.1 M NaCl$ and $0.1 M$ urea. B. Azeotropic mixtures boil without change in…
Chemistry · Solutions · MCQ
Q7.Arrange the following orbitals in decreasing order of energy. A. $n = 3, l = 0, m = 0$ B. $n = 4, l = 0, m = 0$ C. $n = 3, l = 1, m = 0$ D. $n = 3, l = 2, m = 1$ …
Chemistry · Structure of Atom · MCQ
Q8.In Dumas method for the estimation of $N_{2}$ , the sample is heated with copper oxide and the gas evolved is passed over :
Chemistry · Practical Organic Chemistry · MCQ
Q9.Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A): The first ionization enthalpy of $3 d$ series elements is more than that of group 2 metals Reason (R): In 3d…
Chemistry · Periodic Table and Periodicity · MCQ
Q10.A hydrocarbon ' $X$ ' with formula $C_{6} H_{8}$ uses two moles of $H_{2}$ on catalytic hydrogenation of its one mole. On ozonolysis, ' $X$ ' yields two moles of methane dicarbaldehyde. The…
Chemistry · Hydrocarbons · MCQ
Q11.Given below are two statements : Statement I: Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes green Statement II: The green colour observed is due to the formation of copper(I)…
Chemistry · P Block Elements · MCQ
Q12.In the following halogenated organic compounds, the one with the maximum number of chlorine atoms in its structure is :
Chemistry · Haloalkanes and Haloarenes · MCQ
Q13.The incorrect statement for the use of indicators in acid-base titration is :
Chemistry · Ionic Equilibrium · MCQ
Q14.Assume carbon burns according to the following equation : $2 C_{(s)} + O_{2 (g)} \to 2 CO (g)$ when $48 g$ carbon is burnt in $48 g$ of oxygen, the volume of…
Chemistry · Some Basic Concepts of Chemistry · Numerical
Q15.The number of molecules which gives the haloform test among the following molecules is . Includes diagram
Chemistry · Aldehydes Ketones and Carboxylic Acids · Numerical
Q16.Amongst the following, the number of species having the linear shape is . $XeF_{2}, I_{3}^{+}, C_{3} O_{2}, I_{3}^{-}, CO_{2}, SO_{2}, BeCl_{2}$ …
Chemistry · Chemical Bonding and Molecular Structure · Numerical
Q17.Enthalpies of formation of $CCl_{4} (g), H_{2} O (g), CO_{2} (g)$ and $HCl (g)$ are $- 105, - 242, - 394$ and $- 92 kJ mol^{- 1}$ respectively. The…
Chemistry · Thermodynamics · Numerical
Q18.At $1.434 \times 1 0^{- 3} g L^{- 1}$ , the solubility of silver chloride in water is $1.434 \times 1 0^{- 3} g L^{- 1}$ . The value of $- lo g K_{sp}$ for silver chloride is . (Given mass of $Ag$ …
Chemistry · Ionic Equilibrium · Numerical
Q19.The resistivity of a $0.8 M$ solution of an electrolyte is $5 \times 1 0^{- 3} Ω cm$ . Its molar conductivity is $\times 1 0^{4} Ω^{- 1} cm^{2} mol^{- 1}$ . (Nearest…
Chemistry · Electrochemistry · Numerical
Q20.A sample of a metal oxide has formula $M_{0.83} O_{1.00}$ . The metal $M$ can exist in two oxidation states $+ 2$ and $+ 3$ . In the sample of $M_{0.83} O_{1.00}$ , the percentage of metal ions…
Chemistry · Some Basic Concepts of Chemistry · Numerical
Q21.If the CFSE of $[Ti (H_{2} O)_{6}]^{3 +}$ is $- 96.0 kJ / mol$ , this complex will absorb maximum at wavelength $nm$ . (nearest integer) Assume…
Chemistry · Coordination Compounds · Numerical
Q22.The rate constant for a first order reaction is $20 min^{- 1}$ . The time required for the initial concentration of the reactant to reduce to its $\frac{1}{32}$ level is $\times 1 0^{- 2} min$ .…
Chemistry · Chemical Kinetics and Nuclear Chemistry · Numerical