MEDIUM
10th CBSE
IMPORTANT
Earn 100

Why do we make alloys? State any two reasons.

Important Questions on Metals And Non-Metals

MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3D>Q 7
What are the constituents of bronze? Write its two main uses. Name the common constituent of brass and bronze.
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3D>Q 8
Write chemical equations to show what happens when: manganese dioxide is heated with aluminium.
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3D>Q 8
Write chemical equations to show what happens when: cinnabar is roasted in a furnace.
EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3D>Q 9
The oxide X2O3 is unaffected by water. Outline a method by which a sample of metal X can be obtained from its ore. Give one reason as to why have you chosen this method.
EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3D>Q 10
In nature, aluminium is found in the form of its compounds while gold is found in the free state. Give reasons.
EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3D>Q 11
Explain how the following metals are obtained from their compounds by the reduction process.
(i) Metal M, which is in the middle of the reactivity series.
(ii) Metal N, which is high up in the reactivity series.
EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3D>Q 12
The following reaction takes place when aluminium powder is heated with MnO2 ;
3MnO2 (s) + 4 Al(s) → 3Mn (l) + 2 A12O3 (l) + Heat
(a) Is aluminium getting reduced?
(b) Is MnO2 getting oxidised?
EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3D>Q 13
What are the constituents of solder alloy? Which property of solder makes it suitable for welding electrical wires?