Question

Question 1:  When two reactants , A and B are mixed to give products C and D , the reaction quotient , Q , at the initial stages of the reaction
a)is zero
b)decreases with time
c )is independent of time
d)increases with time

Answer 1

THE ANSWER IS B)DECREASES WITH TIME

Answer 2

Answer:

The reaction quotient Q is zero at the initial stage of the reaction.

(a) is correct.

Explanation:

Given that,

A+B⇄C+D

Initially, the concentration are only of A and B and the concentration of C and D is zero.

Initially, The concentration of A and B are high.

The quotient is

$Q=\dfrac{[C][D]}{[A][B]}$

When the reaction get start , The concentration of A and B get decrease and the concentration of C and D get increase with the time.

So, The reaction quotient Q is zero at the initial stage of the reaction because the concentration of the products C and D is zero.

Hence, The reaction quotient Q is zero at the initial stage of the reaction.