Nitrolim (a nitrogenous fertilizer) is a mixture of-

1. Calcium carbide and calcium cyanamide.

2. Calcium oxide and calcium carbide.

3. Calcium cyanamide and carbon.

4. Calcium oxide and carbon.

The strongest base among the following is-

1. $\mathrm{Al}{\left(\mathrm{OH}\right)}_3$                                   

2. $\mathrm{Mg}{\left(\mathrm{OH}\right)}_2$

3. $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2$                                 

4. $\mathrm{Ba}{\left(\mathrm{OH}\right)}_2$

When magnesium ribbon is heated to redness in an atmosphere of nitrogen and subsequently cooled with water, the gas evolved is-

(1) $N_2$                                               

(2) $N{H}_3$

(3) $H_2$                                               

(4) $C{O}_2$

The ion of which of the following metals has least ionic conductivity in the aqueous solution-

(1) Lithium                                           

(2) Sodium 

(3) Potassium                                         

(4) Rubidium

Magnesium hydride can be prepared by the action of-

(1) Lithium hydride on magnesium chloride

(2) Aluminium hydride on magnesium chloride

(3) Lithium aluminium hydride on magnesium chloride

(4) Lithium magnesium hydride on lithium chloride

Which of the following is not the characteristics of alkali metals –

1. Low m.p.                                         

2. Low electronegativity

3. High ionisation energies

4. Their ions are isoelectronic with noble gases

Calcium can be obtained by the electrolysis of-

1. $CaC{l}_2$ and $Ca{F}_2$                     

2. $Ca{\left(OH\right)}_2$

3. $CaC{l}_2$                                   

4. $Ca{F}_2$

The incorrect statement regarding Be(II group) is -

1. It forms an ionic carbide.

2. Its carbonate decomposes on heating.

3. Its halides are covalent.

4. It is easily attacked by water.

The atomic volumes of alkali metals are in the order-

(1) Li > Na > K > Rb > Cs                           

(2) Li > Na = K > Rb > Cs

(3) Li < Na < K < Rb < Cs                           

(4) Li < Na < K < Rb = Cs

Lithium has the minimum tendency to form ${\mathrm{Li}}^{+}$ ion. The aqueous solution of lithium is the:

1. Strongest reducing agent.                      

2. Poorest reducing agent.

3. Strongest oxidising agent.                

4. Poorest oxidising agent.