Question

Write an example of each :
(i) A metal which is so soft that it can be cut with a knife and a non-metal which is the hardest natural substance.
(ii) A metal and a non-metal which exists as liquid at room temperature.


CBSE Class X Science SA 1 ( 2 marks)

Answer 1

(I)alkaline metal such as lithium sodium are so soft that it can be cut with a knife
               diamond is the hardest non metal  substance.




(II)bromine is a non metal which exist as liquid at room tempreature

Answer 2

Explanation:

Soft metal - Sodium (Na) It can be cut with a knife Hard non- metal - Diamond It is the hardest substance.