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1. Consider the given reaction:
\(A(g) \xrightarrow{k=0.1 M \min ^{-1}} 2 B(\mathrm{~g}) \)
If the initial concentration of A is 0.5 M, which of the following graphs correctly represents the concentration of B over time?

1.		2.
3.		4.

2. The activation energy of one of the reactions in a biochemical process is \(\mathrm{532611~ J~ mol^{–1} .}\) When the temperature falls from \(\mathrm{310~ K}\) to \(\mathrm{300~ K,}\) the change observed in the rate constant is \(\mathrm{k_{300} = x × 10^{–3} k_{310}.}\)
The value of \(\mathrm{x}\) is:
[Given: ln\(\mathrm{10 = 2.3, R = 8.3 ~JK^{–1} mol^{–1}}\)]

1.	1	2.	5
3.	2	4.	8

3. Consider the following first-order reactions:
\(A \rightarrow C ; t_{1/2}=15 \mathrm{~min}, B \rightarrow D ; t_{1/2}=5 \mathrm{~min} \)
The initial concentrations of A and B are 1 molar and 8 molar respectively. The time when the concentration of A and B becomes equal is ‘X’ minutes. The value of 2X is: 
1. 40 min
2. 50 min
3. 45 min
4. 54 min

4.

Select the correct option based on the statements below:

Statement 1:	The overall order of a reaction is the sum of the powers of all the reactants in the rate expression.
Statement 2:	Examples of higher-order reactions (order > 2) are abundant.

 

1.	Both Statement 1 and Statement 2 are true.
2.	Both Statement 1 and Statement 2 are false
3.	Statement 1 is true, but Statement 2 is false.
4.	Statement 1 is false, but Statement 2 is true.

5. Which of the following statements is/are incorrect?

(i)	A catalyst lowers the activation energy of a reaction.
(ii)	A catalyst allows the same rate of reaction to be achieved at a lower temperature.
(iii)	A catalyst mixes with the reactants and increases the overall concentration of reactants in the rate equation.

1. i only
2. i and ii only
3. ii and iii only
4. iii only