NEET 2020 Phase 1 | Chemical Kinetics Question 16 | Chemistry

NEET 2020 Phase 1

MCQ (Single Correct Answer)

-1

An increase in the concentration of the reactants of a reaction leads to change in :

heat of reaction

threshold energy

collision frequency

activation energy

NEET 2020 Phase 1

MCQ (Single Correct Answer)

-1

The rate constant for a first order reaction is 4.606 $$ \times $$ 10^-3 s^-1. The time required to reduce 2.0 g of the reactant to 0.2 g is :

200 s

500 s

1000 s

100 s

NEET 2019

MCQ (Single Correct Answer)

-1

If the rate constant for a first order reaction is k, the time (t) required for the completion of 99 % of the reaction is given by :

$$t = {{4.606} \over k}$$

$$t = {{2.303} \over k}$$

$$t = {{0.693} \over k}$$

$$t = {{6.909} \over k}$$

NEET 2019

MCQ (Single Correct Answer)

-1

For the chemical reaction
N₂(g) + 3H₂(g) ⇌ 2NH₃(g)
the correct option is :

$$ - {{d\left[ {{N_2}} \right]} \over {dt}} = 2{{d\left[ {N{H_3}} \right]} \over {dt}}$$

$$ - {{d\left[ {{N_2}} \right]} \over {dt}} = {1 \over 2}{{d\left[ {N{H_3}} \right]} \over {dt}}$$

$$3{{d\left[ {{H_2}} \right]} \over {dt}} = 2{{d\left[ {N{H_3}} \right]} \over {dt}}$$

$$ - {1 \over 3}{{d\left[ {{H_2}} \right]} \over {dt}} = -{1 \over 2}{{d\left[ {N{H_3}} \right]} \over {dt}}$$

NEET Subjects

Biology

Botany

Zoology