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ICSE Class 7 Chemistry Question 1 of 16

Metals and Non-metals — Question 3

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Question

Question 3

Mention two uses of the following metals and non-metals:

(a) Iron

(b) Aluminium

(c) Gold

(d) Oxygen

(e) Iodine

Answer

(a) Iron is used for:

  1. Construction of power transmission towers.
  2. Making pipes, tanks, cylinders, nails, agricultural tools, railings, wire meshes etc.

(b) Aluminium is used for:

  1. Making utensils, cans for drinks, furniture, window frames etc.
  2. Packaging foodstuffs and wrappers of medicines in the form of aluminium foil.

(c) Gold is used for:

  1. Making jewellery and gold coins.
  2. In dentistry to fill in teeth cavities(in form of alloy with silver).

(d) Oxygen is used for:

  1. Breathing and respiration, in hospitals oxygen cylinders are used for serious patients to help them in breathing.
  2. It is essential for combustion.

(e) Iodine is used for:

  1. Making photographic films in the form of potassium iodide.
  2. Making tincture of iodine and iodex which are used as an antiseptic and pain reliever respectively.