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1
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

2
VITEEE 2024
MCQ (Single Correct Answer)
+4
-1

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)
+4
-1

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
4
VITEEE 2023
MCQ (Single Correct Answer)
+4
-1

The ionic conductance of following cation in a given concentration are in the order.

A
$$\mathrm{Li}^{+}>\mathrm{Na}^{+}>\mathrm{K}^{+}>\mathrm{Rb}^{+}>\mathrm{Cs}^{+}$$
B
$$\mathrm{Li}^{+}<\mathrm{Na}^{+}<\mathrm{K}^{+}<\mathrm{Rb}^{+}<\mathrm{Cs}^{+}$$
C
$$\mathrm{Li}^{+}<\mathrm{Na}^{+}>\mathrm{K}^{+}>\mathrm{Rb}^{+}>\mathrm{Cs}^{+}$$
D
$$\mathrm{Li}^{+}=\mathrm{Na}^{+}<\mathrm{K}^{+}<\mathrm{Rb}^{+}<\mathrm{Cs}^{+}$$
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