Question

find odd one out and give reasons also 1. sodium, potassium, phosphorus, and calcium2. copper, magnesium, aluminium and mercury.3. oxygen, nitrogen ,Sulphur and graphite.4. iodine, sulphur, Oxygen and phosphorus5. bronze, brass, steel and German Silver

Answer 1

Answer:

1) Phosphorus

Reason - It is only non metal among the three of them that are metals.

2) Mercury

Reason - It is only liquid at room temperature among the three that are solid at room temperature.

3) Graphite

Reason - It is the mineral form of carbon. All the three are simple forms of elements.

4) Steel

Reason - Rest of them contains copper except steel which does not contain copper in any proportion.

Hope it helps..!!

Answer 2

Answer:

a) Bromine, oxygen, nitrogen, hydrogen -

b) Sodium, potassium, phosphorus, calcium -

c) oxygen ,nitrogen, Sulfur ,graphite -

Explanation:

a- Hydrogen because hydrogen has positive valency.

b- Phosphorus because it is a Non-metal.

c- Graphite because it is a metal

Hope it helps!!

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