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Chemistry · 2010 · Shift 0

26 questions from this JEE Main paper

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2010 · Shift 0
Chemistry

Chemistry · 2010 · Shift 0

26 questions from this JEE Main paper

Aldehydes Ketones and Carboxylic Acids1 questions Basics of Organic Chemistry2 questions Ionic Equilibrium3 questions Chemical Equilibrium1 questions Thermodynamics2 questions Biomolecules1 questions Compounds Containing Nitrogen1 questions Hydrocarbons1 questions Haloalkanes and Haloarenes1 questions Alcohols Phenols and Ethers1 questions Coordination Compounds2 questions Practical Organic Chemistry1 questions Chemical Kinetics and Nuclear Chemistry2 questions Electrochemistry2 questions Solutions2 questions Periodic Table and Periodicity1 questions Structure of Atom2 questions

Q1.One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is
Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ
Q2.The correct order of increasing basicity of the given conjugate bases (R = $C H_{3}$ ) is
Chemistry · Basics of Organic Chemistry · MCQ
Q3.Out of the following, the alkene that exhibits optical isomerism is
Chemistry · Basics of Organic Chemistry · MCQ
Q4.Solubility product of silver bromide is 5.0 $\times$ 10–13. The quantity of potassium bromide (molar mass taken as 120g of mol–1) to be added to 1 litre of 0.05 M solution of silver nitrate to start the precipitation of AgBr is :
Chemistry · Ionic Equilibrium · MCQ
Q5.In aqueous solution the ionization constants for carbonic acid are K1 = 4.2 x 10–7 and K2 = 4.8 x 10–11 Select the correct statement for a saturated 0.034 M solution of the carbonic acid.
Chemistry · Chemical Equilibrium · MCQ
Q6.At 25°C, the solubility product of $M g (O H)_{2}$ is 1.0 $\times$ 10–11. At which pH, will $M g^{2 +}$ ions start precipitating in the form of $M g (O H)_{2}$ from a solution of 0.001 M $M g^{2 +}$ ions?
Chemistry · Ionic Equilibrium · MCQ
Q7.Three reactions involving $H_{2} P O_{4}^{-}$ are given below : (i) $H_{3} P O_{4}$ + $H_{2} O$ $\to$ $H_{3} O^{+}$ + $H_{2} P O_{4}^{-}$ (ii) $H_{2} P O_{4}^{-}$ + $H_{2} O$ $\to H P O_{4}^{2 -}$ + $H_{3} O^{+}$ (iii) $H_{2} P O_{4}^{-}$ + $O H^{-}$ $\to$ $H_{3} P O_{4}$ + $O^{2 -}$ In which of the above does $H_{2} P O_{4}^{-}$ …
Chemistry · Ionic Equilibrium · MCQ
Q8.For a particular reversible reaction at temperature T, ∆H and ∆S were found to be both +ve. If Te is the temperature at equilibrium, the reaction would be spontaneous when :
Chemistry · Thermodynamics · MCQ
Q9.The standard enthalpy of formation of $N H_{3}$ is –46.0 kJ mol–1. If the enthalpy of formation of $H_{2}$ from its atoms is –436 kJ mol–1 and that of $N_{2}$ is –712 kJ mol–1, the average bond enthalpy of N–H bond in $N H_{3}$ is :
Chemistry · Thermodynamics · MCQ
Q10.Biuret test is not given by
Chemistry · Biomolecules · MCQ
Q11.In the chemical reactions, the compounds $^{'} A^{'}$ and $^{'} B^{'}$ respectively are Includes diagram
Chemistry · Compounds Containing Nitrogen · MCQ
Q12.The main product of the following reaction is $C_{6} H_{5} C H_{2} C H (O H) C H (C H_{3})_{2} co n c . H_{2} S O_{4} ?$
Chemistry · Hydrocarbons · MCQ
Q13.Consider the following bromides : The correct order of $S_{N} 1$ reactive is Includes diagram
Chemistry · Haloalkanes and Haloarenes · MCQ
Q14.From amongst the following alcohols the one that would react fastest with conc. $H C l$ and anhydrous $Z n C l_{2}$ , is
Chemistry · Alcohols Phenols and Ethers · MCQ
Q15.A solution containing 2.675g of $C o C l_{3}$ . 6 $N H_{3}$ (molar mass = 267.5 g mol–1) is passed through a cation exchanger. The chloride ions obtained in solution were treated with excess of $A g N O_{3}$ to give 4.78 g of $A g C l$ (molar mass = 143.5 g…
Chemistry · Coordination Compounds · MCQ
Q16.Which one of the following has an optical isomer ? (en = ethylenediamine)
Chemistry · Coordination Compounds · MCQ
Q17.29.5 mg of an organic compound containing nitrogen was digested according to Kjeldahl’s method and the evolved ammonia was absorbed in 20 mL of 0.1 M HCl solution. The excess of the acid required 15 mL of 0.1 M NaOH solution for complete…
Chemistry · Practical Organic Chemistry · MCQ
Q18.The time for half life period of a certain reaction A $\to$ products is 1 hour. When the initial concentration of the reactant ‘A’, is 2.0 mol L–1, how much time does it take for its concentration to come from 0.50 to 0.25 mol L–1 if it is…
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q19.Consider the reaction : $C l_{2}$ (aq) + $H_{2} S$ (aq) → $S$ (s) + 2 $H^{+}$ (aq) + 2 $C l^{-}$ (aq) The rate equation for this reaction is rate = k [ $C l_{2}$ ] [ $H_{2} S$ ] Which of these mechanisms is/are consistent with this rate equation? (A) $C l_{2}$ +…
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q20.The Gibbs energy for the decomposition of $A l_{2} O_{3}$ at 500oC is as follows : $\frac{2}{3} A l_{2} O_{3} \to \frac{4}{3} A l + O_{2}$ , $Δ_{r} G$ = + 966 kJ mol–1 The potential difference needed for electrolytic reduction of $A l_{2} O_{3}$ at 500oC…
Chemistry · Electrochemistry · MCQ
Q21.The correct order of $E_{M^{2 +} / M}^{o}$ values with negative sign for the four successive elements Cr, Mn, Fe and Co is :
Chemistry · Electrochemistry · MCQ
Q22.On mixing, heptane and octane form an ideal solution. At 373 K, the vapour pressures of the two liquid components (heptane and octane) are 105 kPa and 45 kPa respectively. Vapour pressure of the solution obtained by mixing 25.0g of heptane…
Chemistry · Solutions · MCQ
Q23.If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, the change in freezing point of water (∆Tf), when 0.01 mol of sodium sulphate is dissolved in 1 kg of water, is (Kf = 1.86 K kg…
Chemistry · Solutions · MCQ
Q24.The correct sequence which shows decreasing order of the ionic radii of the elements is
Chemistry · Periodic Table and Periodicity · MCQ
Q25.Ionisation energy of $H e^{+}$ is 19.6 x 10–18 J atom–1. The energy of the first stationary state (n = 1) of $L i^{2 +}$ is
Chemistry · Structure of Atom · MCQ
Q26.The energy required to break one mole of Cl–Cl bonds in $C l_{2}$ is 242 kJ mol–1. The longest wavelength of light capable of breaking a single Cl – Cl bond is (c = 3 x 108 ms–1 and NA = 6.02 x 1023 mol–1)
Chemistry · Structure of Atom · MCQ