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Q1. Which metal is commonly used to make food packaging materials as it is cheaper, and its thin
sheets can be folded easily into any shape?
(i) Aluminium
(ii) Copper
(iii) Iron
(iv) Gold
Answer: Aluminium is commonly used to make food packaging materials because it is cheap, lightweight,
and its thin sheets can be easily folded into any shape.
Q2. Which of the following metal catches fire when it comes in contact with water?
(i) Copper
(ii) Aluminium
(iii) Zinc
(iv) Sodium
Answer: Sodium catches fire when it comes in contact with water.
Q3. State with reason(s) whether the following statements are True (T) or False (F).
(i) Aluminium and copper are examples of non-metals used for making utensils and statues.
Answer: False. Aluminium and copper are metals, not non-metals. They are used for making utensils and
statues.
(ii) Metals form oxides when combined with oxygen, the solution of which turns blue litmus paper to red.
Answer: False. Metal oxides are generally basic in nature and turn red litmus paper blue.
(iii) Oxygen is a non-metal essential for respiration.
Answer: True. Oxygen is a non-metal and is essential for respiration in living organisms.
(iv) Copper vessels are used for boiling water because they are good conductors of electricity.
Answer: False. Copper vessels are used because they are good conductors of heat, not electricity.
Q4. Why are only a few metals suitable for making jewellery?
Answer: Only a few metals like gold, silver, and platinum are suitable for making jewellery because they are
shiny, do not corrode easily, and are malleable and ductile.
Q5. Match the uses of metals and non-metals given in Column I with the jumbled names of metals
and non-metals given in Column II.
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Q1. Which metal is commonly used to make food packaging materials as it is cheaper, and its thin
sheets can be folded easily into any shape?
(i) Aluminium
(ii) Copper
(iii) Iron
(iv) Gold
Answer: Aluminium is commonly used to make food packaging materials because it is cheap, lightweight,
and its thin sheets can be easily folded into any shape.
Q2. Which of the following metal catches fire when it comes in contact with water?
(i) Copper
(ii) Aluminium
(iii) Zinc
(iv) Sodium
Answer: Sodium catches fire when it comes in contact with water.
Q3. State with reason(s) whether the following statements are True (T) or False (F).
(i) Aluminium and copper are examples of non-metals used for making utensils and statues.
Answer: False. Aluminium and copper are metals, not non-metals. They are used for making utensils and
statues.
(ii) Metals form oxides when combined with oxygen, the solution of which turns blue litmus paper to red.
Answer: False. Metal oxides are generally basic in nature and turn red litmus paper blue.
(iii) Oxygen is a non-metal essential for respiration.
Answer: True. Oxygen is a non-metal and is essential for respiration in living organisms.
(iv) Copper vessels are used for boiling water because they are good conductors of electricity.
Answer: False. Copper vessels are used because they are good conductors of heat, not electricity.
Q4. Why are only a few metals suitable for making jewellery?
Answer: Only a few metals like gold, silver, and platinum are suitable for making jewellery because they are
shiny, do not corrode easily, and are malleable and ductile.
Q5. Match the uses of metals and non-metals given in Column I with the jumbled names of metals
and non-metals given in Column II.
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