NCERT Solutions | Class 8 Science Chapter 4 | Materials: Metals and Non

CBSE Solutions | Science Class 8

Check the below NCERT Solutions for Class 8 Science Chapter 4 Materials: Metals and Non Pdf free download. NCERT Solutions Class 8 Science were prepared based on the latest exam pattern. We have Provided Materials: Metals and Non Class 8 Science NCERT Solutions to help students understand the concept very well.

NCERT | Class 8 Science

NCERT Solutions Class 8 Science
Book:	National Council of Educational Research and Training (NCERT)
Board:	Central Board of Secondary Education (CBSE)
Class:	8th
Subject:	Science
Chapter:	4
Chapters Name:	Materials: Metals and Non
Medium:	English

Materials: Metals and Non | Class 8 Science | NCERT Books Solutions

You can refer to MCQ Questions for Class 8 Science Chapter 4 Materials: Metals and Non to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

NCERT TEXTBOOK EXERCISES

ncert science class 8 book, Question 1.

Which of the following can be beaten into thin sheets?
(a) Zinc
(b) Phosphorus
(c) Sulphur
(d) Oxygen

cbse science class 8 solutions, Answer :

(a) Zinc.

ncert science class 8 Chapter 4, Question 2.

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.

ncert class 8 science Chapter 4 question answer, Answer :

(c) Generally, metals are ductile.

ncert science class 8 pdf free download, Question 3.

Fill in the blanks.

Phosphorus is a very ……… non-metal.
Metals are ……….. conductors of heat and
Iron is …….. reactive than copper.
Metals react with acids to produce ………………. gas.

cbse science class 8 solutions, Answer :

reactive
good, electricity
more
hydrogen.

ncert science class 8 solutions, Question 4.

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. [ ]

ncert class 8 science Chapter 4 question answer, Answer :

(a) F
(b) T
(c) F
(d) F.

ncert science class 8 textbook pdf, Question 5.

Some properties are listed in the following Table. Distinguish between metals and non-metals on the basis of these properties.

Properties

Metals

Non-metals

1. Appearance

2. Hardness

3. Malleability

4. Ductility

5. Heat Conduction

6. Conduction of Electricity

cbse science class 8 solutions, Answer :

Properties	Metals	Non-metals
1. Appearance	have metallic luster	dull
2. Hardness	hard	soft
3. Malleability	malleable	non-malleable
4. Ductility	ductile	non-ductile
5. Heat Conduction	good conductors	bad conductors
6. Conduction of Electricity	good conductors	bad conductors/insulators

NCERT Solutions for Class 8 Science, Question 6.

Give reasons for the following.

Aluminium foils are used to wrap food items.
Immersion rods for heating liquids are made up of metallic substances.
Copper cannot displace zinc from its salt solution,
Sodium and potassium are stored in kerosene.

ncert class 8 science Chapter 4 question answer, Answer :

It maintains the temperature of food items intact as it is a good conductor of heat.
Metals are good conductors of electricity. That is why immersion rods are made up of metals.
It is because copper is less reactive than zinc.
It is because sodium and potassium react vigorously when coming in contact with air or water.

NCERT Solutions for Class 8 Science Chapter 4, Question 7.

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

cbse science class 8 solutions, Answer :

Aluminium is a metal. Metals are more reactive to acids. That is why acidic foodstuffs like lemon pickles must not be stored in aluminium utensils.

science class 8 Chapter 4, Question 8.

Match the substances given in Column A with their uses given in Column B.

Column A	Column B
(i) Gold	(a) Thermometers
(ii) Iron	(b) Electric wire
(iii) Aluminium	(c) Wrapping food
(iv) Carbon	(d) Jewellery
(v) Copper	(e) Machinery
(vi) Mercury	(f) Fuel

ncert class 8 science Chapter 4 question answer, Answer :

Column A	Column B
(i) Gold	(d) Jewellery
(ii) Iron	(e) Machinery
(iii) Aluminium	(c) Wrapping food
(iv) Carbon	(f) Fuel
(v) Copper	(b) Electric wire
(vi) Mercury	(a) Thermometers

science class 8 pdf, Question 9.

What happens when
(1) Dilute sulphuric acid is poured on a copper plate?
(2) Iron nails are placed in copper sulphate solution?
Write word equations of the reactions involved.

cbse science class 8 solutions, Answer :

Copper sulphate is formed and hydrogen gas is released.
Copper + dil. sulphuric acid → Copper sulphate + Hydrogen (gas)
Brown coating is deposited on the iron nails. This is because of the displacement of copper from copper sulphate solution by iron.
Iron + Copper sulphate (solution) → Iron sulphate (solution) + Copper

cbse class 8 science book, Question 10.

Saloni took a piece of burning charcoal and collected the gas evolved in a test tube.
(1) How will she find the nature of the gas?
(2) Write down word equations of all the reactions taking place in this process.

ncert class 8 science Chapter 4 question answer, Answer :

She will bring a wet litmus paper in contact with the gas. If the gas turns wet blue litmus paper into red, the gas will be acidic.
1. Carbon + Oxygen → Carbon dioxide.
2. Carbon dioxide + Water → Carbonic acid.

cbse class 8 science Chapter 4, Question 11.

One day Reeta went to a jeweller’s shop with her mother. Her mother gave old gold jewellery to the goldsmith to polish. The 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?

cbse science class 8 solutions, Answer :

In polishing, the jeweller put the gold jewellery in a mild acidic solution, which in reaction with acid goes into the solution. So, in this process, a certain amount of gold is lost to the acidic solution.