Reactivity with Air and Water (Group 2)

Q. Calcium burns in nitrogen to produce a white powder which dissolves in sufficient water to produce a gas (A) and an alkaline solution. The solution on exposure to air produces a thin solid layer of (B) on the surface.
Find out B

1. $CaC{O}_3$
2. $C{a}_3{N}_2$
3. CaO
4. None of these

Q.

The species that does not contain peroxide ions is:

1. $Pb{O}_2$

2. $Sr{O}_2$

3. $Ba{O}_2$

4. $H_2{O}_2$

Q. Calcium burns in nitrogen to produce a white powder which dissolves in sufficient water to produce a gas (A) and an alkaline solution. The solution on exposure to air produces a thin solid layer of (B) on the surface.
The gas A is:

1. None of these
2. $N_2$
3. $N{H}_3$
4. $N_{2}O$

Q.

___________________ does not react with Oxygen even when it is heated.

Q. Define Non-electrolyte.

Q. 0.02 mole of [Co(NH₃)₅Br]Cl₂ and 0.02 mole of [Co(NH₃Cl]SO₄ are present in 200ccof a solution X.The number of moles of the ppts Yand Z that are formed when the solution X is treated with excess silver nitrate and excess barium chloride are resp