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
Which of the following metal/s is/are not ductile?
  • A
    Sodium & Iron
  • B
    Barium & Boron
  • C
    arsenic & antimony
    Correct
  • D
    Copper
2
Metal used for galvanisation process is :
  • A
    Zinc
    Correct
  • B
    Gold
  • C
    Iron
  • D
    Copper
3
If we add Iron to solution of Zinc Sulphate reaction will form :
  • A
    quick reaction will occur to form Iron Sulphate
  • B
    slow reaction will occur to form Iron Sulphate
  • C
    there will not be any reaction
    Correct
  • D
    mixture of Zinc & Iron sulphates
4
Metal having low melting point is :
  • A
    Magnesium
  • B
    Potassium
    Correct
  • C
    Aluminium
  • D
    Cadmium
5
Solder, an alloy used in electrical circuits is made up of :
  • A
    copper & tin
  • B
    lead and tin
    Correct
  • C
    zinc & tin
  • D
    zinc, copper & tin
6
Name of that property of a metal by virtue of which it can be hammered into sheets is :
  • A
    conductivity
  • B
    sonorosity
  • C
    ductility
  • D
    malleability
    Correct
7
Process by which metal can be isolated from its ore is called :
  • A
    displacement
  • B
    galvanisation
  • C
    metallurgy
    Correct
  • D
    electroplating
8
The property of electrical conductivity of metals is due to presence of :
  • A
    atom bound electrons
  • B
    free nuclei
  • C
    free electrons
    Correct
  • D
    free shells
9
A zinc
  • A
    solder
  • B
    bell metal
  • C
    brass
  • D
    bronze
    Correct
10
The metal amphoteric in nature is/are :
  • A
    Zn & Mg
  • B
    Si & Ga
  • C
    Na & K
  • D
    Zn & Al
    Correct
11
Platinum being unreactive is a :
  • A
    semi metal
  • B
    nobel metal
  • C
    noble metal
    Correct
  • D
    non metal
12
Metals have tendency to loose electrons and therefore they form :
  • A
    semi positive ions
  • B
    positive ions
    Correct
  • C
    semi negative ions
  • D
    negative ions
13
Which of the following metal will not react will atmosphere at all?
  • A
    Calcium
  • B
    Palladium
    Correct
  • C
    Copper
  • D
    Magnesium
14
To prevent corrosion a metal should be coated with :
  • A
    less reactive metal
  • B
    all the above
  • C
    more reactive metal
    Correct
  • D
    non metal
15
Sodium is highly reactive therefore occurs as :
  • A
    free element
  • B
    metalloid
  • C
    uncombined
  • D
    compound
    Correct