Litharge is:

1. $\mathrm{PbO}$

2. ${\mathrm{PbO}}_2$

3. ${\mathrm{Pb}}_3{\mathrm{O}}_4$

4. $\mathrm{Pb}{\left({\mathrm{CH}}_3\mathrm{COO}\right)}_2$

Red lead is:

1.  $\mathrm{PbO}$

2.  ${{\mathrm{Pb}}_3\mathrm{O}}_4$

3.  ${\mathrm{PbO}}_2$

4.  $\mathrm{HgS}$

White lead or basic lead carbonate is:

1.  $\mathrm{Pb}{\left(\mathrm{OH}\right)}_2·2{\mathrm{PbCO}}_3$

2.  $\mathrm{Pb}{\left(\mathrm{OH}\right)}_2·\mathrm{Pb}{\left({\mathrm{CH}}_3\mathrm{COO}\right)}_2$

3.  ${\mathrm{PbCO}}_3$

4.  ${\mathrm{PbCO}}_3·\mathrm{Pb}{\left(\mathrm{OH}\right)}_2$

Hot and conc. ${\mathrm{HNO}}_3$ react with carbon to form:

1.  ${\mathrm{CO}}_2$

2.  $\mathrm{CO}$

3.  ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COOH}$

4.  ${\mathrm{NO}}_2+{\mathrm{CO}}_2$

${\mathrm{R}}_3\mathrm{SiCl}$ on complete hydrolysis forms:

1.  ${\mathrm{R}}_3\mathrm{SiOH}$

2.  ${\mathrm{R}}_3\mathrm{Si}—\mathrm{O}—{\mathrm{SiR}}_3$

3.  ${\mathrm{R}}_3\mathrm{Si}=\mathrm{O}$

4.  None of the above.

Pyrosilicate ion is:

1.  ${\mathrm{SiO}}_2^{2-}$

2.  ${\mathrm{SiO}}_4^{2-}$

3.  ${\mathrm{Si}}_2{\mathrm{O}}_7^{6-}$

4.  ${\mathrm{Si}}_2{\mathrm{O}}_6^{7-}$

Semi water gas is a mixture of:

1.  water gas and producer gas

2.  water gas and ${\mathrm{CO}}_2$

3.  producer gas and ${\mathrm{CO}}_2$

4.  producer gas and oil gas

Butter of tin is:

1.  ${\mathrm{SnCl}}_2·5{\mathrm{H}}_2\mathrm{O}$

2.  ${\mathrm{SnCl}}_4·5{\mathrm{H}}_2\mathrm{O}$

3.  ${\mathrm{SnBr}}_2·2{\mathrm{H}}_2\mathrm{O}$

4.  ${\mathrm{SnBr}}_4·5{\mathrm{H}}_2\mathrm{O}$

Pewter is an alloy of:

1.  Pb and Sn

2.  Pb, Sb and Sn

3.  Pb, Bi and Sn

4.  sb, Sn and Cu,Bi,Pb

Lead pipes can be used for:

1.  soft water

2.  hard water

3.  both hard and soft water

4.  none of the above