1
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

The activation energy for a reaction is $9.0 \mathrm{kcal} / \mathrm{mol}$. The increase in the rate constant when the temperature is increased from 298 K to 308 K is

A

$10 \%$

B

$100 \%$

C

$50 \%$

D

$64 \%$

2
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

6.35 g of copper (Atomic mass $=635 \mathrm{u}$ ) is deposited at the cathode from a $\mathrm{Cu}^{2+}$ solution using a certain quantity of electric charge.

The volume of oxygen gas liberated at STP from water electrolysis using the same quantity of electric charge is

A

5.6 L

B

11.2 L

C

1.12 L

D

2.8 L

3
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

When $\mathrm{H}_2 \mathrm{O}_2$ is added to a solution of acidified sodium dichromate, a deep blue colour is observed due to the formation of a peroxo complex. This change signifies that

A

dichromate ion is oxidised.

B

hydrogen peroxide is reduced.

C

oxidation state of Cr remains same.

D

hydrogen peroxide acts as an oxidising agent.

4
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

How long should water be electrolysed using 50 A current to release enough $\mathrm{H}_2$ gas to completely reduce 8.0 g of CuO ?

$\left(\mathrm{CuO}+\mathrm{H}_2 \longrightarrow \mathrm{Cu}+\mathrm{H}_2 \mathrm{O}\right.$; Atomic mass of $\mathrm{Cu}=635 \mathrm{u}$ )

A

1600 s

B

1930 s

C

2415 s

D

1280 s

VITEEE Papers

All year-wise previous year question papers