1
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

The activation energy for a reaction is $9.0 \mathrm{~K} \mathrm{cal} \mathrm{mol}^{-1}$. The increase in the rate constant when its temperature is increased from 298 K to 308 K is

A
$10 \%$
B
$100 \%$
C
$50 \%$
D
$63 \%$
2
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

4.5 g of aluminium (Atomic mass 27 amu ) is deposited at cathode from $\mathrm{Al}^{3+}$ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from $\mathrm{H}^{+}$ions in the solution by the same quantity of electric charge will be

A
44.8 L
B
11.2 L
C
22.4 L
D
5.6 L
3
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

When diluted $\mathrm{H}_2 \mathrm{SO}_4$ is added to aqueous solution of potassium chromate, yellow colour solution turns to orange colour. This signifies that

A
chromate ions are reduced.
B
chromate ions are oxidised.
C
monocentric complex is converted into dicentric complex.
D
oxygen gel removed from chromate ions.
4
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

How long should water be electrolysed by passing through 100 amperes current so that oxygen released can completely burn 27.66 g of diborane? (Weight of $B=10.8 \mathrm{u}$ )

A
3.2 h
B
1.8 h
C
2 h
D
3.6 h
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