Which element occurs freely in nature?

1. Iodine

2. Sulphur

3. Phosphorus

4. Magnesium

The metal used in storage batteries is:

1. Cu

2. Sn

3. Pb

4. Ni

Silver obtained by argentiferrous lead is purified by:

1. distillation

2. froth floatation

3. cupellation

4. reacting with KCN

Which process is not used in purification of bauxite?

1. Hall's method

2. Baeyer's method

3. Serpek's method

4. Frankland's method

Chloride ore among the following is:

1. malachite

2. magnesite

3. magnetite

4. Karnalite

Chalcogens are: 

1. hydrocarbons 

2. ore forming elements 

3. oxide forming elements

4. those having ability to catenate

Which pair of elements can form alloy?

1. Zn and Cu

2. Fe and Hg

3. Fe and C

4. C and Pt

Cupellation process is used in the metallurgy of:

1. copper

2. silver

3. lead

4. iron

Liquation is used to purify:

1. Pb

2. Sn

3. Bi

4. All

Blood haemoglobin contains:  

1. Al

2. Mg

3. Cu

4. Fe