An element X belongs to group II A and another element Y belongs to group V A of the periodic table. Which of the following could be correct?

P. Valency of Y will be 5.

Q. Element X will have 2 valence electrons.

R. Element X belongs to group number 2

1. Only P
2. Q
3. R
4. Both Q and R

The organic compound which undergoes substitution reaction is

1. C₂H₂
2. C₄H₈
3. C₈H₁₄
4. C₅H₁₂

An anode used during the extraction of aluminium is

1. platinum rods
2. carbon rods
3. zinc sulphate
4. copper sulphate

Tetraammine copper (II) sulphate dissolves in ammonia solution to give which colour?

1. Greeen
2. Pink
3. Blue
4. Yellow