Question

1. Give an example of metal which :
(a) is liquid at room temperature.
(b) can be cut with a knife.
(c) is the best conductor of heat
(d) is comparatively a poor conductor of heat.
2. Sodium is kent immersed in kerosang oil Why?​

Answer 1

1. give an example of a metal which is liquid at the room temperature : bromine

give an example of a metal which can be cut with a knife : sodium

give an example of a metal which is the best conductor of heat : copper

give an example of metal which is comparatively a poor conductor of heat : steel

2.

Sodium is a very reactive metal. It is kept in kerosene to prevent it from coming in contact with oxygen and moisture. If this happens, it will react with the moisture present in air and form sodiumhydroxide. ... Because Sodium has an explosive reaction to water and not to kerosene.

Answer 2

Answer:

1. Mercury ( hg)

2. Sodium

3. Silver

4. Lead , stainless steel are all bad conductors of heat.

2. Sodium is highly reactive metal and reacts vigorously with Oxygen , Carbon dioxide and Moisture present in the air such that it may even cause fire . To prevent this explosive reaction , Sodium is kept immersed in Kerosene because Sodium doesn't reacts with kerosene.

Explanation:

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