The incorrect statement among the following regarding Lithium is that-

1. The hydroxide, carbonate and nitrate decompose to give the oxide on heating.

2. It is the most electronegative element of group IA.

3. The hydrogen carbonate cannot be isolated as a stable solid.

4. It forms superoxide.

Which one of the following is most stable in ether-

(1) $BeC{l}_2$                                           

(2) $CaC{l}_2$

(3) $SrC{l}_2$                                           

(4) None of these

The strongest reducing agent is-

(1) Be                                                   

(2) Mg

(3) Sr                                                   

(4) Ba

The largest value of ${\mathrm{K}}_{\mathrm{sp}}$ among the following is -

1. ${\mathrm{BeSO}}_4$                                           

2. ${\mathrm{MgSO}}_4$

3. ${\mathrm{CaSO}}_4$                                       

4. ${\mathrm{BaSO}}_4$

What are $\alpha$, $\beta$ and $\gamma$ in the following equation

$\alpha K_4\left[Fe{\left(CN\right)}_6\right]+\beta K_{2}C{O}_3+\gamma S\stackrel{heat}{\to }$  Products ?

the products are Fe, $C{O}_2,$KCNO and KSCN.

(A) 1, 2, 3                                               

(B) 2, 1, 5

(C) 1, 1, 5                                               

(D) 2, 2, 3

The correct order of increasing ionic character is –

(1) $BeC{l}_2<MgC{l}_2<CaC{l}_2< BaC{l}_2$

(2) $BeC{l}_2<MgC{l}_2<BaC{l}_2<CaC{l}_2$

(3) $BeC{l}_2<BaC{l}_2<MgCl<CaC{l}_2$

(4) $BaC{l}_2<CaC{l}_2<MgC{l}_2<BeC{l}_2$

The polarising power of Mg is close to that of –

1. Na                                       

2. Cs

3. Li                                         

4. K

Sodium metal cannot be stored under-

(1) Benzene                                         

(2) Kerosene

(3) Alcohol                                           

(4) Toluene

Sodium looses its lustre on exposure to air due to formation of-

(1) $N{a}_{2}O,$NaOH and $N{a}_{2}C{O}_3$                     

(2) $N{a}_{2}O$ and NaOH

(3) $N{a}_{2}O$ and $N{a}_{2}C{O}_3$                                 

(4) NaOH and $N{a}_{2}C{O}_3$

Sodium oxide reacts with water violently forming NaOH. On heating above 400ºC, it produces

(1) Monoxide and peroxide

(2) Monoxide and metallic sodium

(3) Peroxide and metallic sodium

(4) Monoxide and oxygen