Question

A] Name the following:
1. A yellow colour oxide named as litharge.
2. A white oxide which is yellow when hot.
3. A green coloured compound forms a black oxide on heating.
4. A rotten egg smelling gas.
5. An acidic oxide.
6. A basic oxide.
7. An amphoteric oxide.
8. A neutral oxide.
9. A gas known as mixed acid anhydride.
10. Metals reacts with cold water.
11. Metals react with hot water
12. Metals react with steam.
B] Name the gas evolved when:
1. Hydrogen reacts with chlorine.
2. Hydrogen reacts with sulphur.
3. Carbon monoxide reacts with oxygen.
4. Nitric oxide reacts with oxygen.
5. Ammonium chloride on heating.
6. Copper carbonate on heating.
7. Lead nitrate on heating.
8. Zinc nitrate on heating.
9. Potassium nitrate on heating.
10. Zinc carbonate on heating.
11. Sodium reacts with water.
12. Aluminium reacts with steam.
13. Metals react with dil. Hydrochloric acid.
C] What do you observe when:
1. Lead reacts with oxygen.
2. Zinc reacts with oxygen.

3. Copper reacts with oxygen.
4. Ammonia reacts with Hydrogen chloride.
5. Copper carbonate on heating.
6. Lead nitrate on heating.
7. Zinc reacts with copper sulphate.
8. Iron reacts with copper sulphate.
9. Barium chloride reacts with sodium sulphate.
10. sodium chloride reacts with Lead nitrate.
11. Copper sulphate reacts with sodium hydroxide.
12. Ferrric chloride reacts with sodium hydroxide.
D] 1. What will be the valency of Al in Al 2 (SO 4 ) 3 .
2. The valency of iron is 2+ in FeCl 2 , then what would be the valency of
iron in FeCl 3 .
Question bank Chapter 6
Chemical reactions:
1. Write the four types of chemical reactions.
2. Define: Combination reactions, decomposition reactions, Photolysis,
Displacement reactions, Double decomposition, Neutralization reactions,
Precipitation.
3. Distinguish between: Exothermic and endothermic reactions.

Acidic oxide and basic oxide.

4. What is neutral oxide? Give examples.

Answer 1

Answer:

Aluminium oxide is an amphoteric substance, meaning it can react with both acids and bases, such as hydrofluoric acid and sodium hydroxide, acting as an acid with a base and a base with an acid, neutralising the other and producing a salt.

Explanation: