1
WB JEE 2022
MCQ (Single Correct Answer)
+1
-0.25
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The metal-pair that can produce nascent hydrogen in alkaline medium is :

A
Zn, Al
B
Fe, Ni
C
Al, Mg
D
Mg, Zn
2
WB JEE 2022
MCQ (Single Correct Answer)
+1
-0.25
Change Language

Which of the following is radioactive?

A
Hydrogen
B
Deuterium
C
Tritium
D
none
3
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
How and why does the density of liquid water change on prolonged electrolysis?
A
Decreases, as the proportion of H2O increases
B
Remains unchanged
C
Increases, as the proportion of D2O increases
D
Increases, as the volume decreases
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