Question

1. Give an example of a metal which
(i) is a liquid at room temperature.
(ii) can be easily cut with a knife.
iii) is the best conductor of heat.
(iv) is a poor conductor of heat.
2.why is sodium kept immersed in kerosene oil? ​

Answer 1

Answer:

i) mercury

ii) cesium

iii) silver

iv) steel

2 ) Sodium and Potassium are highly reactive metals and react vigorously with the oxygen, carbon dioxide and moisture present in the air such that it may even cause a fire. To prevent this explosive reaction, Sodium is kept immersed in kerosene because Sodium doesn't react with kerosene.

Answer 2

Answer:

(1)mercury

(2)sodium

(3)copper

(4)steel

Explanation:

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