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

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

Solving the Materials: Metals and Non-Metals Multiple Choice Questions of Class 8 Science Chapter 4 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Materials: Metals and Non-Metals Class 8 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 4 Science Class 8 and cross-check your answers during preparation.

Question 1.
The metal having fastest rate of formation of bubbles of hydrogen with dil. HCl is
(a) zinc
(b) copper
(c) magnesium
(d) silver

Answer

(c) magnesium
Magnesium is higher in reactivity series therefore the rate of formation of bubbles of hydrogen with dil HC1 is fastest.


Question 2.
The non-metal which has very high melting point is:
(a) sulphur
(b) iodine
(c) phosphorus
(d) graphite

Answer

(d) graphite
Graphite is a non-metal having very high melting point.


Question 3.
The non-metal which is good conductor of electricity is:
(a) sulphur
(b) iodine
(c) phosphorus
(d) graphite

Answer

(d) graphite
Graphite is the only non-metal which is a good conductor of electricity.


Question 4.
The non-metal which is liquid at room temperature is:
(a) chlorine
(b) bromine
(c) iodine
(d) carbon

Answer

(b) bromine
Bromine is the non-metal which is liquid at room temperature.


Question 5.
The colour of chlorine is:
(a) yellow
(b) white
(c) green
(d) yellowish green

Answer

(d) yellowish green
The colour of chlorine is yellowish green.


Question 6.
The metal which cannot be stored in packets is:
(a) sodium
(b) calcium
(c) magnesium
(d) zinc

Answer

(a) sodium
Sodium cannot be stored in packets because it will catch fire.


Question 7.
The metal which is poorest conductor of heat is:
(a) mercury
(b) zinc
(c) lead
(d) copper

Answer

(c) lead
Lead is the metal which is poorest conductor of heat.


Question 8.
Property of producing sound by metals is called:
(a) malleability
(b) sonority
(c) ductility
(d) none of these

Answer

(b) sonority
Sonority is the property of producing sound by metals.


Question 9.
The metal which develops a protective layer over its surface by reaction with air is:
(a) zinc
(b) aluminium
(c) iron
(d) silver

Answer

(b) aluminium
Aluminium metal develops a protective layer of aluminium oxide over its surface by reaction with air.


Question 10.
The metal not corroded by air, water and acid is :
(a) copper
(c) gold
(b) zinc
(d) aluminium

Answer

(c) gold
Gold metal is not corroded by air, water and acid because one of the least reative metals reactivity series.


Question 11.
The metal which is soft is:
(a) sodium
(c) silver
(b) gold
(d) copper

Answer

(a) sodium
Sodium metal is soft whereas gold, silver and copper are solids.


Question 12.
The correct statement is:
(a) all metals are ductile
(c) generally, metals are ductile
(b) all non-metals are ductile
(d) some non-metals are ductile

Answer

(c) generally, metals are ductile
Generally, metals are ductile. Sodium, potassium, calcium etc. are not ductile.


Question 13.
When copper is added to iron sulphate solution:
(a) iron is displaced
(b) S04 is displaced
(c) no reaction takes place
(d) non of these

Answer

(c) no reaction takes place
When copper is added to iron sulphate solution then no reaction takes place because copper is below iron in reactivity series.


Question 14.
Arrange the following in the order of their decreasing chemical activity: magnesium, potassium, iron and gold.
(a) magnesium, potassium, iron, gold
(b) magnesium, iron, potassium, gold
(c) potassium, magnesium, iron, gold
(d) none of these

Answer

(c) potassium, magnesium, iron, gold
Potassium, magnesium, iron, gold.


Question 15.
Which of the following is true about metals:
(a) metals generally have low melting point
(b) metal generally have a shiny appearance
(c) metals are poor conductors of heat and electricity
(d) metals are non-malleable and non-ductiles

Answer

(b) metal generally have a shiny appearance
Metals generally have a shiny appearance. They have high melting point, are good conductors of heat and electricity. They are malleable and ductile.


Question 16.
Which one of the following is most ductile:
(a) Aluminium
(b) Copper
(c) Silver
(d) Gold

Answer

(d) Gold
Gold is most ductile.


Question 17.
Which one of the following metals is most reactiVe and stored in kerosene oil:
(a) Iron
(b) Gold
(c) Copper
(d) Sodium

Answer

(d) Sodium
Sodium is most reactive and stored in kerosene oil. Sodium reacts with air and water at room temperature.


Question 18.
Which one of the following metals will not liberate hydrogen gas when attacked by dilute hydrochloric acid:
(a) magnesium
(b) zinc
(c) copper
(d) aluminium

Answer

(c) copper
Copper will not liberate hydrogen gas when attacked by dilute hydrochloric acid because it is very low in reactivity series.


Question 19.
For rusting of iron:
(a) only moisture is required
(b) only air is required
(c) both moisture and air is required
(d) neither moisture nor air is required

Answer

(c) both moisture and air is required
Both moisture and air is required for rusting of iron.


Question 20.
The property of metals by virtue of which metal can be hammered into very thin sheets is called:
(a) ductility
(b) malleability
(c) lustre
(d) sonorus

Answer

(b) malleability
Malleability is the property of metals by virtue of which metals can be hammered into very thin sheets.


Question 21.
Non-metals react with oxygen and form:
(a) natural oxides
(b) acidic oxides
(c) basic oxides
(d) none of these

Answer

(b) acidic oxides
Non-metals react with oxygen and forms non-metallic oxides which are acidic in nature.


Question 22.
Metals react with oxygen to form:
(a) basic oxides
(c) acidic oxides
(b) neutral oxides
(d) none of these

Answer

(c) acidic oxides
Metals react with oxygen and form metallic oxides which are Basic in nature.


Question 23.
Metals can form long wires. This property of metals is known as:
(a) sonorous
(c) malleability
(b) ductility
(d) none of these

Answer

(b) ductility
Ductility is the property of metal to form long wires.


Question 24.
The best electrical conductor is:
(a) gold
(b) silver
(c) copper
(d) aluminium

Answer

(b) silver
Silver is the best conductor of electricity.


Question 25.
Which of the following can be beaten into thin sheets ?
(a) oxygen
(b) carbon
(c) aluminium
(d) phosphorus

Answer

(c) aluminium
Aluminium can be beaten into thin sheets because it is a metal whereas oxygen, carbon and phosphorus are non-metals.


Question 26.
The metal which reacts violently with cold water is:
(a) zinc
(b) aluminium
(c) sodium
(d) copper

Answer

(c) sodium
Sodium reacts violently with cold water because it is high in the reactivity series.


Question 27.
A liquid metal is:
(a) bromine
(c) iodine
(b) nitrogen
(d) mercury

Answer

(d) mercury
Mercury is liquid metal. Bromine, nitrogen and iodine are non-metals.


Question 28.
The gas produced when metals react with sodium hydroxide is:
(a) nitrogen
(c) oxygen
(b) hydrogen
(d) water vapour

Answer

(b) hydrogen
Hydrogen gas is produced when metals react with sodium hydroxide.


Question 29.
The gas produced when metals reacts with dilute acids is:
(a) nitrogen
(b) carbon dioxide
(c) oxygen
(d) hydrogen

Answer

(d) hydrogen
Hydrogen gas is produced when metals react with dilute acids.


Question 30.
Sulphur reacts with hot concentrated nitric acid and produces:
(a) sulphur dioxide
(b) sulphur trioxide
(c) nitrogen dioxide
(d) sulphur dioxide and Nitrogen dioxide

Answer

(d) sulphur dioxide and Nitrogen dioxide
Sulphur reacts with hot concentrated nitric acid and produces sulphur dioxide, nitrogen dioxide and water


Match the Column-A with Column-B:

Question 1.

Column-A Column-B
(a) Metal which is liquid at room temperature (i) Iodine
(b) Non-metal which is liquid at room temperature (ii) Sodium
(c) Non-metal which is solid at room temperature (iii) Mercury
(d) Metal which is poor conductor of heat (iv) Bromine
(e) A soft metal (v) Lead
Answer
Column-A Column-B
(a) Metal which is liquid at room temperature (iii) Mercury
(b) Non-metal which is liquid at room temperature (iv) Bromine
(c) Non-metal which is solid at room temperature (i) Iodine
(d) Metal which is poor conductor of heat (v) Lead
(e) A soft metal (ii) Sodium

Question 2.

Column-A Column-B
(a) Gallium (i) Gas at room temperature
(b) Potassium (ii) Best condutor of heat
(c) Silver (iii) Solid non-metal at room temperature
(d) Iodine (iv) Soft metal
(e) Helium (v)  Melts on our palm
Answer
Column-A Column-B
(a) Gallium (v) Melts on our palm
(b) Potassium (iv) Soft metal
(c) Silver (ii) Best condutor of heat
(d) Iodine (iii) Solid non-metal at room temperature
(e) Helium (i) Gas at room temperature

Question 3.

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

State whether the following statements are True or False:

Question 1.
Aluminium foils are used to wrap food items.

Answer

True


Question 2.
Immersion rods for heating liquids are made up of non-metallic substances.

Answer

False


Question 3.
Copper can displace zinc from its salt solution.

Answer

False


Question 4.
Sodium and potassium are stored in kerosene.

Answer

True


Question 5.
The surface of most metals have shiny appearance.

Answer

True


Question 6.
Lemon pickle can be stored in an aluminium utensil.

Answer

False


Question 7.
Copper is used for electrical wiring.

Answer

True


Question 8.
Gold is not found hi the free state.

Answer

False


Question 9.
Sodium does not occur in the free state.

Answer

True


Question 10.
Iron is used to construct bridges and houses.

Answer

True


Question 11.
Sodium reacts violently with cold water forming sodium hydroxide.

Answer

True


Question 12.
Less reactive metals displace more reactive metals from their compounds in aqueous solutions.

Answer

False


Question 13.
Non-metals react with oxygen to produce non-metallic oxides which are acidic in nature.

Answer

False


Question 14.
‘Pop’ sound indicates the presence of hydrogen gas.

Answer

True


Question 15.
The sulphurous acid turns red litmus blue.

Answer

False


Fill in the blanks:

Question 1.
All metals except ………………….. are solids at room temperature.

Answer

mercury


Question 2.
Melting point of most of the metals is ………………….. than non-metals.

Answer

more


Question 3.
Gold is at the ………………….. of the reactivity scries of metals.

Answer

bottom


Question 4.
Iron needs ………………….. and ………………….. to rust.

Answer

water and air


Question 5.
The property which allows metals to be hammered into thin sheets is ……………………

Answer

malleable


Question 6.
Non-metals are ………………….. conductors of heat and electricity.

Answer

poor


Question 7.
Metals react with oxygen to produce ………………….. oxides.

Answer

basic


Question 8.
Zinc is ………………….. reactive than copper.

Answer

more


Question 9.
Iron displaces ………………….. from copper sulphate solution.

Answer

copper


Question 10.
Phosphorus is a very ………………….. non-metal.

Answer

reactive


Question 11.
Copper sulphate + Zinc → ………………….. + …………………..

Answer

Zinc sulphate + Copper


Question 12.
………………….. is the property of metals by which it can be drawn into wires.

Answer

Ductility


Question 13.
………………….. substances when hammered break into small pieces.

Answer

Brittle


Question 14.
Acid oxides are oxides which turn ………………….. litmus paper to ……………………

Answer

blue, red


Question 15.
Basic oxides are oxides which turn ………………….. litmus paper to ……………………

Answer

red, blue


Question 16.
The shiny appearance on the cut surface of metals is called …………………..

Answer

metallic lustre


Question 17.
Coal is ………………….. conductor of electricity.

Answer

poor


Question 18.
Metals react with acid to produce ………………….. gas.

Answer

hydrogen


Question 19.
………………….. reactive metals displace ………………….. reactive metals from their compounds in aqueous solutions.

Answer

More, less


Question 20.
Phosphorus is stored in …………………..

Answer

water


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