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Chemistry · 2008 · Shift 0

29 questions from this JEE Main paper

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2008 · Shift 0
Chemistry

Chemistry · 2008 · Shift 0

29 questions from this JEE Main paper

Hydrocarbons4 questions Basics of Organic Chemistry3 questions Chemical Equilibrium2 questions Ionic Equilibrium2 questions Thermodynamics2 questions D and F Block Elements2 questions Biomolecules1 questions Alcohols Phenols and Ethers1 questions Haloalkanes and Haloarenes1 questions Coordination Compounds2 questions P Block Elements1 questions Chemical Kinetics and Nuclear Chemistry1 questions Electrochemistry1 questions Solutions2 questions Chemical Bonding and Molecular Structure2 questions Structure of Atom2 questions

Q1.In the following sequence of reactions, the alkene affords the compound ‘B’ $C H_{3} - C H = C H - C H_{3}$ $O_{3}$ A $Z n ⟶ H_{2} O$ B The compound B is
Chemistry · Hydrocarbons · MCQ
Q2.Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains
Chemistry · Hydrocarbons · MCQ
Q3.The hydrocarbon which can react with sodium in liquid ammonia is
Chemistry · Hydrocarbons · MCQ
Q4.The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is
Chemistry · Basics of Organic Chemistry · MCQ
Q5.For the following three reactions a, b and c, equilibrium constants are given: a. $C O$ (g) + $H_{2} O$ (g) $⇋$ $C O_{2}$ (g) + $H_{2}$ (g) ; K1 b. $C H_{4}$ (g) + $H_{2} O$ (g) $⇋$ $C O$ (g) + 3 $H_{2}$ (g) ; K2 c. $C H_{4}$ …
Chemistry · Chemical Equilibrium · MCQ
Q6.The pKa of a weak acid, HA, is 4.80. The pKb of a weak base, BOH, is 4.78. The pH of an aqueous solution of the corresponding salt, BA, will be
Chemistry · Ionic Equilibrium · MCQ
Q7.Four species are listed below i. $H C O_{3}^{-}$ ii. $H_{3} O^{+}$ iii. $H S O_{4}^{-}$ iv. $H S O_{3} F$ Which one of the following is the correct sequence of their acid strength?
Chemistry · Ionic Equilibrium · MCQ
Q8.The equilibrium constants KP1 and KP2 for the reactions X $⇋$ 2Y and Z $⇋$ P + Q, respectively are in the ratio of 1 : 9. If the degree of dissociation of X and Z be equal then the ratio of total…
Chemistry · Chemical Equilibrium · MCQ
Q9.Standard entropy of $X_{2}$ , $Y_{2}$ and $X Y_{3}$ are 60, 40 and 50 JK−1 mol−1 , respectively. For the reaction, $\frac{1}{2} X_{2}$ + $\frac{3}{2} Y_{2} \to$ $X Y_{3}$ , $Δ H$ = -30 kJ, to be at equilibrium, the temperature will be :
Chemistry · Thermodynamics · MCQ
Q10.Oxidising power of chlorine in aqueous solution can be determined by the parameters indicated below: $\frac{1}{2} C l_{2} (g)$ $\frac{1}{2} Δ_{d i ss} H^{Θ}$ $C l (g) Δ_{e g} H^{Θ} C l^{-} (g) Δ_{H y d} H^{Θ} C l^{-} (a q)$ …
Chemistry · Thermodynamics · MCQ
Q11.Amount of oxalic acid present in a solution can be determined by its titration with $K M n O_{4}$ solution in the presence of $H_{2} S O_{4} .$ The titration gives unsatisfactory result when carried out in the presence of $H C l,$ because $H C l$ :
Chemistry · D and F Block Elements · MCQ
Q12.The treatment of $C H_{3} M g X$ with $C H_{3} C \equiv C - H$ produces
Chemistry · Hydrocarbons · MCQ
Q13.The absolute configuration of Includes diagram
Chemistry · Basics of Organic Chemistry · MCQ
Q14.The electrophile, $E^{\oplus}$ attacks the benzene ring to generate the intermediate $σ -$ complex. Of the following, which $σ -$ complex is lowest energy?
Chemistry · Basics of Organic Chemistry · MCQ
Q15. $α$ -D-(+)-glucose and $β$ -D-(+)-glucose are
Chemistry · Biomolecules · MCQ
Q16.Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives
Chemistry · Alcohols Phenols and Ethers · MCQ
Q17.The organic chloro compound, which shows complete stereochemical inversion during a SN2 reaction, is
Chemistry · Haloalkanes and Haloarenes · MCQ
Q18.The coordination number and the oxidation state of the element ‘E’ in the complex $[E (e n)_{2} (C_{2} O_{4})]$ $N O_{2}$ (where (en) is ethylene diamine) are, respectively,
Chemistry · Coordination Compounds · MCQ
Q19.In which of the following octahedral complexes of Co (at. no. 27), will the magnitude of $Δ_{o}$ be the highest?
Chemistry · Coordination Compounds · MCQ
Q20.Larger number of oxidation states are exhibited by the actinoids than those by the lanthanoids, the main reason being :
Chemistry · D and F Block Elements · MCQ
Q21.Which one of the following is the correct statement?
Chemistry · P Block Elements · MCQ
Q22.For a reaction $\frac{1}{2} A \to 2 B$ rate of disappearance of ‘A’ is related to the rate of appearance of ‘B’ by the expression
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q23.Given $E_{C r^{3 +} / C r}^{o}$ = -0.72 V; $E_{F e^{2 +} / F e}^{o}$ = -0.42V, The potential for the cell Cr | $C r^{3 +}$ (0.1M) || $F e^{2 +}$ (0.01 M) | Fe is
Chemistry · Electrochemistry · MCQ
Q24.The vapour pressure of water at 20oC is 17.5 mm Hg. If 18 g of glucose ( $C_{6} H_{12} O_{6}$ ) is added to 178.2 g of water at 20oC, the vapour pressure of the resulting solution will be
Chemistry · Solutions · MCQ
Q25.At 80oC, the vapour pressure of pure liquid ‘A’ is 520 mm Hg and that of pure liquid ‘B’ is 1000 mm Hg. If a mixture solution of ‘A’ and ‘B’ boils at 80oC and 1 atm pressure, the amount of ‘A’ in the mixture is (1 atm = 760 mm Hg)
Chemistry · Solutions · MCQ
Q26.Which of the following pair of species have the same bond order?
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q27.The bond dissociation energy of B - F in $B F_{3}$ is 646 kJ mol-1 whereas that of C - F in $C F_{4}$ is 515 kj mol-1. The correct reason for higher B - F bond dissociation energy as compared to that of C - F is
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q28.The ionization enthalpy of hydrogen atom is 1.312 × 106 J mol−1. The energy required to excite the electron in the atom from n = 1 to n = 2 is
Chemistry · Structure of Atom · MCQ
Q29.Which one of the following constitutes a group of the isoelectronic species?
Chemistry · Structure of Atom · MCQ