1
NEET 2023 Manipur
+4
-1

For a reaction $$3 \mathrm{~A} \rightarrow 2 \mathrm{~B}$$

The average rate of appearance of $$\mathrm{B}$$ is given by $$\frac{\Delta[B]}{\Delta t}$$. The correct relation between the average rate of appearance of $$\mathrm{B}$$ with the average rate of disappearance of A is given in option :

A
$$\frac{-\Delta[\mathrm{A}]}{\Delta \mathrm{t}}$$
B
$$\frac{-3 \Delta[\mathrm{A}]}{2 \Delta t}$$
C
$$\frac{-2 \Delta[\mathrm{A}]}{3 \Delta \mathrm{t}}$$
D
$$\frac{\Delta[\mathrm{A}]}{\Delta t}$$
2
NEET 2023 Manipur
+4
-1

The correct options for the rate law that corresponds to overall first order reaction is

A
Rate $$=\mathrm{k}[\mathrm{A}]^0[\mathrm{~B}]^2$$
B
Rate $$=\mathrm{k}[\mathrm{A}][\mathrm{B}]$$
C
Rate $$=\mathrm{k}[\mathrm{A}]^{1 / 2}[\mathrm{~B}]^2$$
D
Rate $$=\mathrm{k}[\mathrm{A}]^{-1 / 2}[\mathrm{~B}]^{3 / 2}$$
3
NEET 2023
+4
-1

For a certain reaction, the rate $$=\mathrm{k}[\mathrm{A}]^{2}[\mathrm{~B}]$$, when the initial concentration of A is tripled keeping concentration of $$\mathrm{B}$$ constant, the initial rate would

A
increase by a factor of six
B
increase by a factor of nine
C
increase by a factor of three
D
decrease by a factor of nine
4
NEET 2023
+4
-1

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : A reaction can have zero activation energy.

Reason R : The minimum extra amount of energy absorbed by reactant molecules so that their energy becomes equal to threshold value, is called activation energy.

In the light of the above statements, choose the correct answer from the options given below:

A
Both A and R are true but R is NOT the correct explanation of A.
B
A is true but R is false.
C
A is false but R is true.
D
Both A and R are true and R is the correct explanation of A.
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