MEDIUM
10th CBSE
IMPORTANT
Earn 100

Why is cryolite added to bauxite in the extraction of aluminium?

Important Questions on Metals and Nonmetals

EASY
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 5 - Metals and Nonmetals>EXERCISES>Q 19
Define galvanisation.
EASY
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 5 - Metals and Nonmetals>EXERCISES>Q 20

In the molecular formula of sulphur molecule, Sx the value of x can be-

A. x = 4

B. x = 16

C. x = 8

"Enter your correct answer as A, B or C."

MEDIUM
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 5 - Metals and Nonmetals>EXERCISES>Q 21
Name the oxide ore of aluminium. (Cinnabar/ Bauxite)
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 5 - Metals and Nonmetals>EXERCISES>Q 22
Name the constituents of an alloy called German silver.
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 5 - Metals and Nonmetals>EXERCISES>Q 23
A given non-metal forms sulphuric acid on reacting with nitric acid. Identify the non-metal.
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 5 - Metals and Nonmetals>EXERCISES>Q 24
Write one constituent each of brass and bronze that is not common to both.
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 5 - Metals and Nonmetals>EXERCISES>Q 25
Which two major constituents form the alloy ‘duralumin’?
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 5 - Metals and Nonmetals>EXERCISES>Q 26
What would happen to the roadside iron railings if they are not painted? Why does it happen so?