NEET Practice Questions (MCQs) with Answers & Solutions

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Rate of chemical reaction can be kept constant...

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Explanation

none of the above

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The one which is unimolecular reaction is

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Explanation

$ N_2 O_5 \rightarrow N_2 O_4 + { 1 \over 2} O_2 $

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The rate of reaction for $Cl_3 C CHO + NO \rightarrow CHCl_3 + NO + CO $ is given by equation, $ rate = K[Cl_3 C CHO][NO] $ . If concentration is expressed in $ mole litre^{-1} $ , the unit of K are

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Explanation

$ litre mole^{-1} sec ^ {-1} $

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For a reaction $ 2A + B \rightarrow Products $ , the active mass of B is kept constant and that of A is doubled. The rate of reaction will then

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Explanation

increase 4 times

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The conversion of $ A \rightarrow B $ follows second order kinetics. Doubling the concentration of A will increase the rate of formation B by a factor of

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Explanation

$ 4 rate = K [A] ^2 $ $ \therefore rate = K [2A] ^2 = 4.K [A]^ 2 $

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Ethyl acetate is hydrolysed in alkaline medium, its order of a reaction and molecularity are respectively

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Explanation

$ 2 , 2 CH_3 COOC_2H_5 + NaOH \rightarrow CH_3 COONa + C_2 H_5 OH $

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According to the Arrhenius equation a straight line is to be obtained by plotting the logarithm of the rate constant of a reaction against ...

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Explanation

1 /T

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The given reaction $ 2FeCl_3 + Sn Cl_2 \rightarrow 2 FeCl_2 + SnCl_4 $ is an example of ______ reaction

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Explanation

third order

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In the reverable reaction $ 2 NO_2 \rightleftharpoons N_2 O_4 $ , the rate of disappearence of $ NO_2 $ is equal to ….

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Explanation

$ 2 K_1 [NO_2] ^ 2 - 2k_2 [N_2 O_4 ] $ $ For 2 NO_2 \rightleftharpoons N_2 O_4 $ $ Rate = - { 1 \over 2} { d [NO_2] \over dt} = K_1 [NO_2 ]^2 -K_2 [N_2 O_4 ] $ $ \therefore rate = { -d[NO_2 ] \over dt } = 2 K_1 [ NO_2 ]^2 - 2K_2 [N_2 O_4 ] $

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If concentration of reactants is increased by ‘x’, then rate constant K becomes .

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Explanation

K

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