EASY
10th CBSE
IMPORTANT
Earn 100

Give reason for the following:
Alumina is dissolved in molten cryolite for electrolysis to obtain aluminium metal.

Important Questions on Metals And Non-Metals

EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3D>Q 3
Give reason for the following:
Nitrogen gas is used to preserve food.
EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3D>Q 4
Define the terms, mineral, ore and gangue as used in metallurgical operations.
HARD
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3D>Q 4
Describe with a labelled diagram, the method of concentration of a sulphide ore.
EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3D>Q 4
Differentiate between roasting and calcination.
EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3D>Q 5
What method for concentration of ore is preferred in each of the following cases and why?
(i) The ore has higher density particles interspersed with a large bulk of low density impurities.
(ii) The ore consists of copper sulphide intermixed with clay particles.
EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3D>Q 5
Give an example of amalgam.
EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3D>Q 6
Define the terms "alloy" and "amalgam". Name the alloy used for welding electric wires together. What are its constituents?
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3D>Q 6
Name the constituents of the following alloys: (a) Brass, (b) Stainless steel, (c) Bronze. State one property in each of these alloys that is different from its main constituents.