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
Oxides of non-metals are :
  • A
    acidic
    Correct
  • B
    metalloid
  • C
    basic
  • D
    absolute amphoteric
2
Metal oxides react with water to produce :
  • A
    oxygen gas
  • B
    all the metal
  • C
    hydroxides of metal
    Correct
  • D
    hydrogenated metal
3
If metallic Zinc is added to copper sulphate solution :
  • A
    Copper displaces Zinc from solution
  • B
    Sulphur is displaced
  • C
    Zinc displaces copper from solution
    Correct
  • D
    no reaction takes place
4
Gas evolved when Calcium oxide reacts with water is/are :
  • A
    both hydrogen & oxygen
  • B
    hydrogen
    Correct
  • C
    oxygen
  • D
    carbon dioxide
5
Metals that react with oxygen include :
  • A
    copper
  • B
    all of these
    Correct
  • C
    iron
  • D
    aluminium
6
Calcium disappears into water forming :
  • A
    transparent water
  • B
    oxygen gas
  • C
    Calcium carbonate
  • D
    milky water
    Correct
7
Metals that react with both acids and bases are called :
  • A
    amphibian
  • B
    amphitamine
  • C
    amphoteric
    Correct
  • D
    amphiteric
8
Metal that reacts with steam only is/are :
  • A
    Zinc
  • B
    both Zinc & Iron
    Correct
  • C
    Iron
  • D
    Sodium
9
Brass is an alloy of :
  • A
    copper – tin
  • B
    zinc – copper
    Correct
  • C
    zinc – tin
  • D
    zinc – copper- tin
10
Zinc reacts with hydrochloric acid to form :
  • A
    Hydrogen gas
  • B
    Oxygen gas
  • C
    Zinc Chloride
  • D
    both Zinc Chloride & Hydrogen gas
    Correct
11
When Silver is added to Copper Nitrate solution result is :
  • A
    formation of alloy
  • B
    formation of Silver Nitrate
  • C
    no reaction
    Correct
  • D
    formation Silver Nitrite
12
Rust formation is called:
  • A
    deformation
  • B
    corrosion
    Correct
  • C
    aberration
  • D
    illusion
13
That property of a metal by virtue of which it can be drawn into wires is :
  • A
    conductivity
  • B
    ductility
    Correct
  • C
    malleability
  • D
    density
14
The metal alloyed with gold for making jewellery :
  • A
    silver
  • B
    copper
    Correct
  • C
    aluminium
  • D
    zinc
15
The magnesium oxide reacts with sulphuric acid to form :
  • A
    magnesium sulphate & hydrogen gas
  • B
    magnesium chloride & oxygen gas
  • C
    magnesium sulphate & water
    Correct
  • D
    magnesium sulphite & hydrogen gas