Class 8 Materials Metals And Non Metals CBSE Questions & Answers

Class 8 · Materials Metals And Non Metals

This is Science Class 8 Materials Metals and Non Metals CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Select synonymous word to metal in free state :
  • A
    native
    Correct
  • B
    reactive
  • C
    indigenous
  • D
    combined
2
Desired characteristics can be obtained by :
  • A
    combining different ratios of metals
  • B
    both making alloys & combining different ratios of metals
    Correct
  • C
    making compounds of metals
  • D
    making alloys
3
Steel is an alloy of :
  • A
    iron and tin
  • B
    iron and carbon
    Correct
  • C
    iron and copper
  • D
    iron and bronze
4
This image shows a liquid non-metal it is :
Question 4 figure 1
  • A
    Iodine
  • B
    Helium
  • C
    Bromine
    Correct
  • D
    Chlorine
5
Two non metals of greatest significance to life on earth are :
  • A
    nitrogen & oxygen
  • B
    iodine & oxygen
  • C
    sulphur & oxygen
  • D
    hydrogen & oxygen
    Correct
6
An element shown in the image is :
Question 6 figure 1
  • A
    Sulphur
    Correct
  • B
    Germanium
  • C
    Uranium
  • D
    Gold
7
The process of coating a thin layer of Zinc on surface of iron object can be called :
  • A
    Both galvanisation & alloying
  • B
    galvanisation
    Correct
  • C
    alloying
  • D
    electroplating
8
Nowadays base metal is used for making :
  • A
    coal
  • B
    coins
    Correct
  • C
    debris
  • D
    notes
9
Which non metal is required for proper functioning of thyroid :
  • A
    Sulphur
  • B
    Chlorine
  • C
    Bromine
  • D
    Iodine
    Correct
10
Read the following statements :i) All ores are minerals.ii) Not all minerals are ores.
  • A
    both are correct
    Correct
  • B
    both are wrong
  • C
    statement i) is correct but ii) is wrong.
  • D
    statement ii) is correct but i) is wrong.
11
It is the best source of Iodine, it is :
Question 11 figure 1
  • A
    iodine powder
  • B
    iodine extracted from sea food
  • C
    iodized salt
    Correct
  • D
    crystals of iodine
12
Copper and Zinc mixture forms :
  • A
    Steel
  • B
    Stainless steel
  • C
    Brass
    Correct
  • D
    Bronze
13
The element shown in the image is :
Question 13 figure 1
  • A
    silver
  • B
    steel
  • C
    lead
    Correct
  • D
    stainless steel
14
Wrought iron is the :
  • A
    impure form of iron
  • B
    alloy of iron
  • C
    waste produced during extraction of iron
  • D
    pure form of iron
    Correct
15
This food is rich source of :
Question 15 figure 1
  • A
    phosphorus
  • B
    sodium
  • C
    calcium
  • D
    iron
    Correct