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
Gold : metal :: Silicon : _____
  • A
    non metal
  • B
    semi non metal
  • C
    metalloid
    Correct
  • D
    metal
2
Mineral is :
  • A
    both natural and artificial
  • B
    artificial material
  • C
    natural material
    Correct
  • D
    only pure element
3
Non metal that conducts electricity is :
  • A
    coal
  • B
    diamond
  • C
    iodine
  • D
    graphite
    Correct
4
Metals are :
  • A
    neutral
  • B
    electronegative
  • C
    none of the above
  • D
    electropositive
    Correct
5
Rust formation is called :
  • A
    aberration
  • B
    corrosion
    Correct
  • C
    deformation
  • D
    illusion
6
A metal is characterised by :
  • A
    low electrical conductivity
  • B
    non sonorosity
  • C
    high electrical conductivity
    Correct
  • D
    non malleability
7
Non metals occur as:
  • A
    solid
  • B
    all of these
    Correct
  • C
    gas
  • D
    liquid
8
Metals that react with both acids and bases are called:
  • A
    amphiteric
  • B
    amphitamine
  • C
    amphibian
  • D
    amphoteric
    Correct
9
Metalloids are also known as :
  • A
    impure metals
  • B
    minerals
  • C
    semi metals
    Correct
  • D
    alloys
10
Metals are solid except :
  • A
    iodine
  • B
    mercury
    Correct
  • C
    gallium
  • D
    sodium
11
Metal oxides are :
  • A
    meteoroids
  • B
    basic oxides
    Correct
  • C
    acidic oxides
  • D
    neutral oxides
12
Bases turn :
  • A
    red litmus green
  • B
    red litmus blue
    Correct
  • C
    green litmus red
  • D
    blue litmus red
13
Iron + oxygen + _____ => iron oxide
  • A
    acid
  • B
    alkali
  • C
    salt
  • D
    water
    Correct
14
The metal which can form a barrier layer of oxide on its surface is :
  • A
    Aluminium
    Correct
  • B
    Sodium
  • C
    Barium
  • D
    Carbon
15
Metal are hard but _____ can be cut with a knife
  • A
    potassium
    Correct
  • B
    magnesium
  • C
    mercury
  • D
    iron