Q. Saloni took a piece of burning charcoal and collected the gas evolved in a test tube.
(a) How will she find the acidic/basic nature of the gas?
(b) Write down word equation of all the reactions taking place in this process.

Q. Give reasons for the following:
(a) Aluminium foils are used to wrap food items.
(b) Immersion rods for heating liquids are made up of metallic substances.
(c) Copper cannot displace zinc from its salt solution.
(d) Sodium and potassium are stored in kerosene.

Q. What happens when:
(a) dilute sulphuric acid is poured on a copper plate?
(b) iron nails are placed in copper sulphate solution?
Write word equations of the reactions involved.

Q. State whether following statements are True or False.
(a) Generally, non-metals react with acids.
(b) Sodium is a very reactive metal.
(c) Copper displaces zinc from zinc sulphate solution.
(d) Coal can be drawn into wires.

Q. Fill in the blanks:

Q. Which of the following can be beaten into thin sheets?

1. Zinc
2. Sulphur
3. Phosphorus
4. Oxygen

Q. Some properties are listed in the following table. Distinguish between metals and non-metals based on these properties.

Properties	Metals	Non-metals
1. Appearance
2. Hardness
3. Malleability
4. Ductility
5. Heat Conduction
6. Conduction of Electricity

Q. Match the elements given, in column I correctly with their respective uses given in column II.

Q. Can you store lemon pickle in an aluminium utensil? Explain.

Q. Which of the following statements is correct?

1. All non-metals are ductile.
2. Generally, metals are ductile.
3. Some non-metals are ductile.
4. All metals are ductile.

Q. One day Reeta went to a jeweler's shop with her mother. Her mother gave old gold jewelry to the goldsmith to polish. The next day when they brought the jewelry back, they found that there was a slight loss in its weight. Can you suggest a reason for the loss of weight?