KCET 2021 | Chemical Kinetics Question 10 | Chemistry

The rate of a gaseous reaction is given by the expression $$k[A][B]^2$$. If the volume of vessel is reduced to one half of the initial volume, the reaction rate as compared to original rate is

$$\frac{1}{16}$$

$$\frac{1}{8}$$

KCET 2021

MCQ (Single Correct Answer)

-0

Higher order $$(>3)$$ reactions are rare due to

shifting of equilibrium towards reactants due to elastic collisions

loss of active species on collision

low probability of simultaneous collision of all reacting species

increase in entropy as more molecules are involved

KCET 2020

MCQ (Single Correct Answer)

-0

The time required for $$60 \%$$ completion of a first order reaction is $$50 \mathrm{~min}$$. The time required for $$93.6 \%$$ completion of the same reaction will be

100 min

83.8 min

50 min

150 min

KCET 2020

MCQ (Single Correct Answer)

-0

For an elementary reaction $$2 A+3 B \rightarrow 4 C+D$$ the rate of appearance of $C$ at time '$$T$$' is $$2.8 \times 10^{-3} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~S}^{-1}$$. Rate of disappearance of $$B$$ at '$$t$$' $t$ will be

$$\frac{4}{3}\left(2.8 \times 10^{-3}\right) \mathrm{mol} \mathrm{~L}^{-1} \mathrm{~S}^{-1}$$

$$\frac{3}{4}\left(2.8 \times 10^{-3}\right) \mathrm{mol} \mathrm{~L}^{-1} \mathrm{~S}^{-1}$$

$$2\left(2.8 \times 10^{-3}\right) \mathrm{mol} \mathrm{~L}^{-1} \mathrm{~S}^{-1}$$

$$\frac{1}{4}\left(2.8 \times 10^{-3}\right) \mathrm{mol} \mathrm{~L}^{-1} \mathrm{~S}^{-1}$$

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