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MCQ Questions for Class 8 Science Chapter 4 Materials: Metals and Non-Metals with Answers

 

Materials: Metals and Non-Metals Class 8 MCQs Questions with Answers

I. Choose the correct option.

Question 1.
Metals are
(a) shiny
(b) hard
(c) sonorous
(d) all of these

Answer

Answer: (d) all of these


Question 2.
Non-metals are
(a) non-ductile
(b) non-sonorous
(c) non-malleable
(d) all of these

Answer

Answer: (d) all of these


Question 3.
Which of the following is a non-metal?
(a) Aluminium
(b) Oxygen
(c) Iron
(d) Silver

Answer

Answer: (b) Oxygen


Question 4.
Metalloids possess the properties of
(a) metals
(b) non-metals
(c) both metals and non-metals
(d) none of these

Answer

Answer: (c) both metals and non-metals


Question 5.
The most reactive metal is
(a) copper
(b) zinc
(c) potassium
(d) gold

Answer

Answer: (c) potassium


Question 6.
Non-metals are
(a) generally gases
(b) generally liquids
(c) generally solids
(d) generally solid and gases

Answer

Answer: (d) generally solid and gases


Question 7.
Which of the following metal is stored in kerosene?
(a) Sodium
(b) Magnesium
(c) Phosphorus
(d) Zinc

Answer

Answer: (a) Sodium


Question 8.
Metal oxides are
(a) neutral
(b) basic
(c) acidic
(d) all of these

Answer

Answer: (b) basic


Question 9.
The non-metal which is liquid at room temperature is
(a) bromine
(b) chlorine
(c) iodine
(d) carbon

Answer

Answer: (a) bromine


Question 10.
Which substance is used for making pencil lead?
(a) Sulphur
(b) Silicon
(c) Graphite
(d) Aluminium

Answer

Answer: (c) Graphite


Question 11.
Which non-metal is used in making glass?
(a) Graphite
(b) Sulphur
(c) Silica
(d) None of these

Answer

Answer: (c) Silica


Question 12.
Which metal is used in wrapping materials?
(a) Aluminium
(b) Zinc
(c) Copper
(d) None of these

Answer

Answer: (a) Aluminium


Question 13.
The metal found in liquid state is
(a) mercury
(b) silver
(c) calcium
(d) sodium

Answer

Answer: (a) mercury


Question 14.
The most ductile metal is
(a) silver
(b) gold
(c) copper
(d) aluminium

Answer

Answer: (b) gold


Question 15.
Non-rpetals
(a) react with water
(b) do not react with water
(c) both (a) and (b)
(d) none of these

Answer

Answer: (b) do not react with water


Question 16.
Which of the following metals are soft enough to be even cut with a knife?
(a) Sodium
(b) Potassium
(c) Lithium
(d) All of these

Answer

Answer: (d) All of these


Question 17.
Which is the hardest substance?
(a) Gold
(b) Diamond
(c) Aluminium
(d) None of these

Answer

Answer: (b) Diamond


Question 18.
Metals react with acids to produce respective salts with evolution of
(a) hydrogen gas
(b) oxygen gas
(c) CO2 gas
(d) none of these

Answer

Answer: (a) hydrogen gas


Question 19.
In displacement reactions
(a) a more reactive metal displaces a less reactive metal.
(b) a less reactive metal displaces a more reactive metal.
(c) both (a) and (b)
(d) none of these

Answer

Answer: (a) a more reactive metal displaces a less reactive metal.


Question 20.
Which of the following non-metals are used in fertilisers?
(a) Nitrogen
(b) Phosphorus
(c) Both (a) and (b)
(d) None of these

Answer

Answer: (c) Both (a) and (b)


II. Fill in the Blanks

Question 1.
Metals are ______of heat and

Answer

Answer: good conductors, electricity


Question 2.
Iodine is a ______having lustre.

Answer

Answer: non-metal


Question 3.
______ and ______ are kept in kerosene to avoid explosion.

Answer

Answer: Sodium, potassium


Question 4.
Non-metal oxides are ______ in nature.

Answer

Answer: acidic


Question 5.
_______ is more reactive than copper.

Answer

Answer: Zinc


Question 6.
Sulphur forms _______ oxides.

Answer

Answer: acidic


Question 7.
Magnesium forms ______ oxides.

Answer

Answer: basic


Question 8.
_______ is less reactive than iron.

Answer

Answer: Copper


Question 9.
All metals are hard except _______ and ______

Answer

Answer: sodium, potassium


Question 10.
Metals have generally ______melting and boiling points.

Answer

Answer: high


Question 11.
_______ are used in medicines as antiseptic.

Answer

Answer: Non-metals


Question 12.
The only liquid metal is ______

Answer

Answer: mercury


Question 13.
______ is non-metal used in breathing by all living beings.

Answer

Answer: Oxygen


Question 14.
The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxide solution is ______

Answer

Answer: aluminium


Question 15.
_______ reacts with cold water vigorously.

Answer

Answer: Sodium


III. True or False

Question 1.
Metals are non-sonorous.

Answer

Answer: False


Question 2.
Metals react with water.

Answer

Answer: True


Question 3.
Non-metals cannot be converted into wires.

Answer

Answer: True


Question 4.
The only liquid metal is bromine.

Answer

Answer: False


Question 5.
Sodium and potassium do not react vigorously with water and oxygen.

Answer

Answer: False


Question 6.
Basic solution turns red litmus into blue.

Answer

Answer: True


Question 7.
Graphite is a good conductor of electricity.

Answer

Answer: True


Question 8.
Generally, metallic oxides are basic and non-metallic oxides are acidic in nature.

Answer

Answer: True


Question 9.
Chlorine is not a non-metal.

Answer

Answer: False


Question 10.
Phosphorus is kept in water.

Answer

Answer: True


Question 11.
All metals exist in solid form at room temperature.

Answer

Answer: False


Question 12.
Rust formed on iron object is acidic in nature.

Answer

Answer: False


Question 13.
Aluminium is more reactive than copper.

Answer

Answer: True


Question 14.
Non-metals react with water to form a gas which burns with a ‘pop’ sound.

Answer

Answer: False


Question 15.
All the gases are non-metals.

Answer

Answer: True


IV. Natch the following

Column IColumn II
1. Malleable(a) Can be transformed into wire
2. Ductile(b) For making crackers
3. Oxygen(c) Give sheets on hammering
4. Copper(d) For disinfecting water
5. Sulphur(e) All living beings inhale during breathing
6. Diamond(f) For making electric wires
7. Sonority(g) For making rails
8. Iron(h) Hardest non-metal
9. Chlorine(i) Ringing of bells
10. Platinum(j) Used in making ornaments
Answer

Answer:

Column IColumn II
1. Malleable(c) Give sheets on hammering
2. Ductile(a) Can be transformed into wire
3. Oxygen(e) All living beings inhale during breathing
4. Copper(f) For making electric wires
5. Sulphur(b) For making crackers
6. Diamond(h) Hardest non-metal
7. Sonority(i) Ringing of bells
8. Iron(g) For making rails
9. Chlorine(d) For disinfecting water
10. Platinum(j) Used in making ornaments


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