Here we are providing Class 8 Science Objective Chapter – 4 Materials: Metals and Non-Metals because its very important for Class 8 students as we all know that every board exam question has MCQs so that students should practice these questions so that students can get good marks in board. Class 8 Science Objective Chapter – 4 Materials: Metals and Non-Metals is an extremely important and its also a year in which students learn the fundamentals of concepts that help them lay a solid foundation for their higher education. Here we are providing in Class Class 8 Science Objective Chapter – 4 Materials: Metals and Non-Metals Wastewater Story 100+ questions so that students practice more and more. If you want class wise Notes Then Click Here
Class 8 Science Objective Chapter – 4 Materials: Metals and Non-Metals
1.The metal having fastest rate of formation of bubbles of hydrogen with dil. HCl is
( A ) zinc
( B ) copper
( C ) magnesium
( D ) silver
Ans – ( C )
2.Which of the following is a liquid at room temperature?
( A ) Iron
( B ) Bromine
( C ) Iodine
( D ) Phosphorus
Ans – ( B )
3.The non-metal which has very high melting point is:
( A ) sulphur
( B ) iodine
( C ) phosphorus
( D ) graphite
Ans – ( D )
4.The most reactive metal is
( A ) copper
( B ) silver
( C ) potassium
( D ) calcium
Ans – ( C )
5.The non-metal which is good conductor of electricity is:
( A ) sulphur
( B ) iodine
( C ) phosphorus
( D ) graphite
Ans – ( D )
6.The metal which is liquid at room temperature is
( A ) sodium
( B ) bromine
( C ) calcium
( D ) mercury
Ans – ( D )
7.The non-metal which is liquid at room temperature is:
( A ) chlorine
( B ) bromine
( C ) iodine
( D ) carbon
Ans – ( B )
8.Which one of the following metals is the most ductile?
( A ) Aluminium
( B ) Copper
( C ) Silver
( D ) Gold
Ans – ( D )
9.The colour of chlorine is:
( A ) yellow
( B ) white
( C ) green
( D ) yellowish green
Ans – ( D )
10.Which one of the following metals is the most reactive and stored in kerosene?
( A ) Iron
( B ) Gold
( C ) Copper
( D ) Potassium
Ans – ( D )
11.The property of a metal by which it can be drawn into wires is called
( A ) conductivity
( B ) malleability
( C ) ductility
( D ) flexibility
Ans – ( C )
12.The metal which cannot be stored in packets is:
( A ) sodium
( B ) calcium
( C ) magnesium
( D ) zinc
Ans – ( A )
13.Name the gas evolved when magnesium reacts with dilute hydrochloric acid
( A ) Chlorine
( B ) Oxygen
( C ) hydrogen
( D ) Nitrogen
Ans – ( C )
14.The metal which is poorest conductor of heat is:
( A ) mercury
( B ) zinc
( C ) lead
( D ) copper
Ans – ( C )
15.The metal which is not corroded by air, water and acid is
( A ) copper
( B ) zinc
( C ) aluminium
( D ) gold
Ans – ( D )
16.Property of producing sound by metals is called:
( A ) malleability
( B ) sonority
( C ) ductility
( D ) none of these
Ans – ( B )
17.Metals are
( A ) soft and brittle
( B ) hard and solid
( C ) liquid
( D ) generally liquid
Ans – ( B )
18.The metal which develops a protective layer over its surface by reaction with air is:
( A ) zinc
( B ) aluminium
( C ) iron
( D ) silver
Ans – ( B )
19.Materials having qualities of both metals and non-metals are
( A ) alloys
( B ) metalloids
( C ) noble metals
( D ) none of these
Ans – ( B )
20.The metal not corroded by air, water and acid is :
( A ) copper
( C ) gold
( B ) zinc
( D ) aluminium
Ans – ( C )
21.Which metal reacts readily with cold water?
( A ) Gold
( B ) Silver
( C ) Magnesium
( D ) Calcium
Ans – ( D )
22.The metal which is soft is:
( A ) sodium
( C ) silver
( B ) gold
( D ) copper
Ans – ( A )
23.The best electrical conductor is
( A ) gold
( B ) copper
( C ) silver
( D ) aluminium
Ans – ( C )
24.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
Ans – ( C )
25.Iron is galvanised by coating it with
( A ) chromium
( B ) sodium
( C ) magnesium
( D ) zinc
Ans – ( D )
26.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
Ans – ( C )
27.Out of these, which one is more reactive with water?
( A ) Sodium
( B ) Magnesium
( C ) Iron
( D ) Copper
Ans – ( A )
28.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
Ans – ( C )
29.Boron is
( A ) metal
( B ) metalloid
( C ) non-metal
( D ) alkali
Ans – ( B )
30.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
Ans – ( B )
31.A mineral from which. a metal can be extracted on the commercial scale, economically is called
( A ) ore
( B ) metalloid
(e) corrosion
( D ) metal
Ans – ( A )
32.Which one of the following is most ductile:
( A ) Aluminium
( B ) Copper
( C ) Silver
( D ) Gold
Ans – ( D )
33. Metalloids possess the properties of
( A ) metals
( B ) non-metals
( C ) both metals and non-metals
( D ) none of these
Ans – ( C )
34.Which one of the following metals is most reactiVe and stored in kerosene oil:
( A ) Iron
( B ) Gold
( C ) Copper
( D ) Sodium
Ans – ( D )
35. Non-metals are
( A ) generally gases
( B ) generally liquids
( C ) generally solids
( D ) generally solid and gases
Ans – ( D )
36.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
Ans – ( C )
37. Which of the following metal is stored in kerosene?
( A ) Sodium
( B ) Magnesium
( C ) Phosphorus
( D ) Zinc
Ans – ( A )
38.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
Ans – ( C )
39.Which of the following is a non-metal?
( A ) Aluminium
( B ) Oxygen
( C ) Iron
( D ) Silver
Ans – ( B )
40.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
Ans – ( B )
41.Metal oxides are
( A ) neutral
( B ) basic
( C ) acidic
( D ) all of these
Ans – ( B )
42.Non-metals react with oxygen and form:
( A ) natural oxides
( B ) acidic oxides
( C ) basic oxides
( D ) none of these
Ans – ( B )
43.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
Ans – ( D )
44.Metals react with oxygen to form:
( A ) basic oxides
( C ) acidic oxides
( B ) neutral oxides
( D ) none of these
Ans – ( C )
45.Which is the hardest substance?
( A ) Gold
( B ) Diamond
( C ) Aluminium
( D ) None of these
Ans – ( B )
46.Metals can form long wires. This property of metals is known as:
( A ) sonorous
( C ) malleability
( B ) ductility
( D ) none of these
Ans – ( B )
47.Metals react with acids to produce respective salts with evolution of
( A ) hydrogen gas
( B ) oxygen gas
( C ) CO2 gas
( D ) none of these
Ans – ( A )
48.The best electrical conductor is:
( A ) gold
( B ) silver
( C ) copper
( D ) aluminium
Ans – ( B )
49.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
Ans – ( A )
50.Which of the following can be beaten into thin sheets ?
( A ) oxygen
( B ) carbon
( C ) aluminium
( D ) phosphorus
Ans – ( C )
51.Which of the following non-metals are used in fertilisers?
( A ) Nitrogen
( B ) Phosphorus
( C ) Both ( A ) and (b)
( D ) None of these
Ans – ( C )
52.The metal which reacts violently with cold water is:
( A ) zinc
( B ) aluminium
( C ) sodium
( D ) copper
Ans – ( C )
53.When non-metal reacts with water
( A ) hydrogen gas is formed
( B ) carbon dioxide gas is formed
( C ) non-metals generally do not react with water.
( D ) none of these.
Ans – ( C )
54.A liquid metal is:
( A ) bromine
( C ) iodine
( B ) nitrogen
( D ) mercury
Ans – ( D )
55.The property of metals by which they can be beaten into thin sheets is called
( A ) malleability
( B ) ductility
( C ) conduction
( D ) expansion
Ans – ( A )
56.The gas produced when metals react with sodium hydroxide is:
( A ) nitrogen
( C ) oxygen
( B ) hydrogen
( D ) water vapour
Ans – ( B )
57.Which one of the following is a metal?
( A ) C
( B ) N
( C ) Na
( D ) O
Ans – ( C )
58.The gas produced when metals reacts with dilute acids is:
( A ) nitrogen
( B ) carbon dioxide
( C ) oxygen
( D ) hydrogen
Ans – ( D )
59.Which of the following does not show the property of malleability?
( A ) Iron
( B ) Graphite
( C ) Aluminium
( D ) Silver
Ans – ( B )
60.Sulphur reacts with hot concentrated nitric acid and produces:
( A ) sulphur dioxide
( B ) sulphur trioxide
( C ) nitrogen dioxide
( D ) sulphur dioxide and Nitrogen dioxide
Ans – ( D )