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.

Alkali metals show-

(1) Only +1 oxidation state

(2) Only –1 oxidation state

(3) +1 and +2 oxidation states

(4) –1 and –2 oxidation states.

Considering greater polarisation in LiCl compared to that in NaCl, which of the following statement is wrong –

(1) The m.p of LiCl is lower than that of NaCl

(2) LiCl dissolves more in organic solvent than NaCl

(3) LiCl will ionise in water more than NaCl

(4) Fused LiCl would be less conducing than fused NaCl

When heated in steam, Mg burns brilliantly producing-

(1) $Mg{\left(OH\right)}_2$                               

(2) $MgO<mspace\; width="1em"></mspace>and<mspace\; width="1em"></mspace>H_2$

(3) $MgO<mspace\; width="1em"></mspace>and<mspace\; width="1em"></mspace>O_2$                         

(4) $MgO<mspace\; width="1em"></mspace>and<mspace\; width="1em"></mspace>O_3$

A chloride dissolves appreciably in cold water. When placed in a platinum wire in Bunsen flame no distinctive colour is noticed. Which cation could be present –

(1) $B{e}^{2+}$                                         

(2) $B{a}^{2+}$

(3) $P{b}^{2+}$                                         

(4) $C{a}^{2+}$