Question

1. Give the scientific reason for the following
i. Gold is used in making ornaments
ii. Sodium and potassium are kept in kerosene
2. write the chemical equation for the following
i. Aluminum reacts with steam
ii. Carbon dioxide dissolves in water​

Answer 1

. Carbon dioxide dissolves in water

Answer 2

Answer:

1)Gold is used in making ornaments.

• They are highly lustrous metals which are resistant to corrosion.
• They are highly malleable and ductile so can be transformed into any shape or design.

2) sodium and potassium are kept in kerosene.

• Sodium and potassium are very reactive metal and readily catches fire in the air. They cannot be kept in water as they react exothermically in water. Therefore they are stored in kerosene.

3) Aluminium reacts with steam.

• 2Al+3H 2 0 ------} Al 2 0 3+3H 2.5

4) Carbon dioxide dissolves in water.

• CO2 (aq) « CO2 (g)

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