NCERT Solutions for Class 8 Science Materials Metals and Non – Metals [Old Book]
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Page 1
NCERT
SOLUTIONS
CLASS - 8TH
aglase .co
SOLUTIONS
CLASS - 8TH
aglase .co
Page 2
Book : Science Ncert Solutions | Chapter-4 Science
Class : 8th
Subject : Science
Chapter : 4
Chapter Name : MATERIAL : Metals And Non-Metals
Q1 Which of the following can be beaten into thin sheets?
(a) Zinc
(b) Phosphorus
(c) Sulphur
(d) Oxygen
Answer. (a) Zinc
Page : 53 , Block Name : Exercise
Q2 Which of the following statements is correct?
(a) All metals are ductile.
(b) All non-metals are ductile.
(c) Generally, metals are ductile.
(d) Some non-metals are ductile.
Answer. (c) Generally, metals are ductile.
However, mercury metal—a liquid at room temperature — cannot be drawn into wires and is not ductile.
Page : 53 , Block Name : Exercise
Q3 Fill in the blanks.
(a) Phosphorus is a very________ non-metal.
(b) Metals are _________ conductors of heat and ________ .
(c) Iron is ___________ reactive than copper.
(d) Metals react with acids to produce _________ gas.
Answer. (a) Phosphorus is a very reactive non-metal.
(b) Metals are good conductors of heat and electricity
(c) Iron is more reactive than copper.
(d) Metals react with acids to produce hydrogen gas.
Page : 53 , Block Name : Exercise
Q4 Mark ‘T’ if the statement is true and ‘F’ if it is 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.( )
Answer. (i) Generally, non-metals react with acids.(F)
Page 1 of 4 Aglasem Schools
Class : 8th
Subject : Science
Chapter : 4
Chapter Name : MATERIAL : Metals And Non-Metals
Q1 Which of the following can be beaten into thin sheets?
(a) Zinc
(b) Phosphorus
(c) Sulphur
(d) Oxygen
Answer. (a) Zinc
Page : 53 , Block Name : Exercise
Q2 Which of the following statements is correct?
(a) All metals are ductile.
(b) All non-metals are ductile.
(c) Generally, metals are ductile.
(d) Some non-metals are ductile.
Answer. (c) Generally, metals are ductile.
However, mercury metal—a liquid at room temperature — cannot be drawn into wires and is not ductile.
Page : 53 , Block Name : Exercise
Q3 Fill in the blanks.
(a) Phosphorus is a very________ non-metal.
(b) Metals are _________ conductors of heat and ________ .
(c) Iron is ___________ reactive than copper.
(d) Metals react with acids to produce _________ gas.
Answer. (a) Phosphorus is a very reactive non-metal.
(b) Metals are good conductors of heat and electricity
(c) Iron is more reactive than copper.
(d) Metals react with acids to produce hydrogen gas.
Page : 53 , Block Name : Exercise
Q4 Mark ‘T’ if the statement is true and ‘F’ if it is 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.( )
Answer. (i) Generally, non-metals react with acids.(F)
Page 1 of 4 Aglasem Schools
Page 3
Book : Science Ncert Solutions | Chapter-4 Science
(ii) Sodium is a very reactive metal.(T)
(iii) Copper displaces zinc from zinc sulphate solution.(F)
(iv) Coal can drawn into wires.(F)
Page : 54 , Block Name : Exercise
Q5 Some properties are listed in the following Table.
Distinguish between metals and non-metals on the basis of these properties.
Answer.
Page : 54 , Block Name : Exercise
Q6 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.
Answer. (a) Aluminium foils are used to wrap food items because aluminium metal is malleable. Therefore,
it can be beaten into thin foils.
Page 2 of 4 Aglasem Schools
(ii) Sodium is a very reactive metal.(T)
(iii) Copper displaces zinc from zinc sulphate solution.(F)
(iv) Coal can drawn into wires.(F)
Page : 54 , Block Name : Exercise
Q5 Some properties are listed in the following Table.
Distinguish between metals and non-metals on the basis of these properties.
Answer.
Page : 54 , Block Name : Exercise
Q6 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.
Answer. (a) Aluminium foils are used to wrap food items because aluminium metal is malleable. Therefore,
it can be beaten into thin foils.
Page 2 of 4 Aglasem Schools
Page 4
Book : Science Ncert Solutions | Chapter-4 Science
(b) Metals are good conductors of heat and electricity. Therefore, immersion rods for heating liquids are
made of metallic substances.
(c) A metal can displace a less reactive metal from its salt in an aqueous solution. But zinc is more reactive
than copper. Therefore, copper cannot displace zinc from its salt solution.
Cu(s) + ZnS04 (aq) No reaction
(d) Sodium and potassium are stored in kerosene because they are highly reactive elements.
They can easily catch re even when in contact with air.
Page : 54 , Block Name : Exercise
Q7 Can you store lemon pickle in an aluminium utensil? Explain.
Answer. Lemon pickle cannot be stored in aluminium utensils because lemon pickle contains acids, which
can react with aluminium (metal) liberating hydrogen gas. This can lead to the spoiling of the pickle.
Page : 54 , Block Name : Exercise
Q8 Match the substances given in Column A with their uses given in Column B.
Answer.
Page : 54 , Block Name : Exercise
Q9 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.
Page 3 of 4 Aglasem Schools
(b) Metals are good conductors of heat and electricity. Therefore, immersion rods for heating liquids are
made of metallic substances.
(c) A metal can displace a less reactive metal from its salt in an aqueous solution. But zinc is more reactive
than copper. Therefore, copper cannot displace zinc from its salt solution.
Cu(s) + ZnS04 (aq) No reaction
(d) Sodium and potassium are stored in kerosene because they are highly reactive elements.
They can easily catch re even when in contact with air.
Page : 54 , Block Name : Exercise
Q7 Can you store lemon pickle in an aluminium utensil? Explain.
Answer. Lemon pickle cannot be stored in aluminium utensils because lemon pickle contains acids, which
can react with aluminium (metal) liberating hydrogen gas. This can lead to the spoiling of the pickle.
Page : 54 , Block Name : Exercise
Q8 Match the substances given in Column A with their uses given in Column B.
Answer.
Page : 54 , Block Name : Exercise
Q9 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.
Page 3 of 4 Aglasem Schools
Page 5
Book : Science Ncert Solutions | Chapter-4 Science
Answer. (a) When dilute sulphuric acid is poured on a copper plate, the copper metal reacts with sulphuric
acid to liberate hydrogen gas.
(Cu) + Sulphuric acid (H2 SO4 ) → Copper sulphate (CuSO4 ) + Hydrogen gas (H2 )
(b) Iron being more reactive displaces copper from copper sulphate solution. In this reaction, the
blue colour of copper sulphate fades and there is deposition of copper on the iron nail.
(Fe) + Copper sulphate (CuSO ) → Iron sulphate (FeSO ) + Copper (Cu)
4 4
Page : 55 , Block Name : Exercise
Q10 Saloni took a piece of burning charcoal and collected the gas evolved in a test tube.
(a) How will she nd the nature of the gas?
(b) Write down word equations of all the reactions taking place in this process.
Answer. (a) Add a few drops of water in the test tube containing gas. Now, cover the test tube and shake it
well. After shaking, test the solution with blue litmus and red litmus. It will turn blue litmus red. Thus, the
gas is acidic in nature.
(b) Charcoal reacts with oxygen to form carbon dioxide gas.
Carbon dioxide reacts with water to form carbonic acid, which turns blue litmus paper red.
Page : 55 , Block Name : Exercise
Q11 One day Reeta went to a jeweller’s shop with her mother. Her mother gave an old gold jewellery to the
goldsmith to polish. Next day when they brought the jewellery back, they found that there was a slight loss
in its weight. Can you suggest a reason for the loss in weight?
Answer. To polish a gold ornament, it is dipped in a liquid called aquaregia (a mixture of hydrochloric acid
and nitric acid). On getting the environment of aquaregia, the outer layer of gold dissolves and the inner
shiny layer appears. The dissolving of the layer causes a reduction in the weight of the jewellery.
Page : 55 , Block Name : Exercise
Page 4 of 4 Aglasem Schools
Answer. (a) When dilute sulphuric acid is poured on a copper plate, the copper metal reacts with sulphuric
acid to liberate hydrogen gas.
(Cu) + Sulphuric acid (H2 SO4 ) → Copper sulphate (CuSO4 ) + Hydrogen gas (H2 )
(b) Iron being more reactive displaces copper from copper sulphate solution. In this reaction, the
blue colour of copper sulphate fades and there is deposition of copper on the iron nail.
(Fe) + Copper sulphate (CuSO ) → Iron sulphate (FeSO ) + Copper (Cu)
4 4
Page : 55 , Block Name : Exercise
Q10 Saloni took a piece of burning charcoal and collected the gas evolved in a test tube.
(a) How will she nd the nature of the gas?
(b) Write down word equations of all the reactions taking place in this process.
Answer. (a) Add a few drops of water in the test tube containing gas. Now, cover the test tube and shake it
well. After shaking, test the solution with blue litmus and red litmus. It will turn blue litmus red. Thus, the
gas is acidic in nature.
(b) Charcoal reacts with oxygen to form carbon dioxide gas.
Carbon dioxide reacts with water to form carbonic acid, which turns blue litmus paper red.
Page : 55 , Block Name : Exercise
Q11 One day Reeta went to a jeweller’s shop with her mother. Her mother gave an old gold jewellery to the
goldsmith to polish. Next day when they brought the jewellery back, they found that there was a slight loss
in its weight. Can you suggest a reason for the loss in weight?
Answer. To polish a gold ornament, it is dipped in a liquid called aquaregia (a mixture of hydrochloric acid
and nitric acid). On getting the environment of aquaregia, the outer layer of gold dissolves and the inner
shiny layer appears. The dissolving of the layer causes a reduction in the weight of the jewellery.
Page : 55 , Block Name : Exercise
Page 4 of 4 Aglasem Schools
Document Details
| Board / Org | NCERT |
| Exam | Class 8 |
| Type | Solution |
| Pages | 5 |
| Language | english |
| Updated | 30 Apr 2026 |