short ans question of metal and non metal class 10
Answers
Answer:
Class 10 Chemistry Chapter 3 Important Questions with Answers Metals and Non-metals
Metals and Non-metals Class 10 Important Questions Very Short Answer Type
Question 1.
Why does a metal not release H2 gas on reacting with dilute nitric acid?
Answer:
As nitric acid acts as a strong oxidising agent and oxidises the released H2 gas to H2O and itself is reduced to either of these gases – N2O, NO2 or NO.
Question 2.
Why is copper used to make hot water tanks whereas steel is not?
Answer:
Copper is a better conductor of heat as compared to steel. Therefore, hot water tanks are made of copper.
Question 3.
Why do the non-metals not displace hydrogen from dilute acids?
Answer:
Non-metals being acceptor of electrons, cannot give electrons to the hydrogen ions of acid to reduce them to hydrogen gas. Hence non-metals do not displace hydrogen from dilute acids.
Question 4.
Give an example of a metal which
(i) can be easily cut with a knife.
(ii) is a liquid at room temperature.
Answer:
(i) Sodium
(ii) Mercury