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
Bronze alloy is made with :
  • A
    Copper & Tin
    Correct
  • B
    Copper & Aluminium
  • C
    Copper & Iron
  • D
    Copper & Zinc
2
Read the following statements :i) Solder is an alloy of Aluminium & Tin.ii) It has very high melting point.
  • A
    statement i) is correct but ii) is wrong
  • B
    both are correct
  • C
    statement ii) is correct but i) is wrong
  • D
    both are wrong
    Correct
3
This element is :
Question 3 figure 1
  • A
    Bromine
  • B
    Aluminium sheet
  • C
    Sodium
  • D
    Mercury
    Correct
4
Read the following statements :i) Calcium turns water milky.ii) Calcium is insoluble in water.
  • A
    both are wrong
  • B
    both are correct
  • C
    statement i) is correct but ii) is wrong
    Correct
  • D
    statement ii) is correct but i) is wrong
5
The fruit shown in the image is a rich source of :
Question 5 figure 1
  • A
    Calcium
  • B
    Manganese
    Correct
  • C
    Potassium
  • D
    Magnesium
6
Find the correct matched pair :
  • A
    electroplating iron
    Correct
  • B
    galvanising iron
  • C
    electroplating iron
  • D
    galvanising iron
7
This image shows :
Question 7 figure 1
  • A
    Sulphur
  • B
    Magnesium
  • C
    Phosphorus
    Correct
  • D
    Soil
8
Plutonium is :
  • A
    all of these
    Correct
  • B
    used to make pacemaker of heart
  • C
    a rare metal
  • D
    used to make nuclear bomb
9
This element shown in image is a pale yellow green gas at room temperature :
Question 9 figure 1
  • A
    Oxygen
  • B
    Chlorine
    Correct
  • C
    Fluorine
  • D
    Sulphur
10
Which reaction is not feasible?
  • A
    $Zn{\text{ }} + {\text{ }}{H_{\mathbf{2}}}S{O_{\mathbf{4}}} = {\text{ }}ZnS{O_{\mathbf{4}}} + {\text{ }}{H_{\mathbf{2}}}$
  • B
    $NaOH{\text{ }} + {\text{ }}HCl{\text{ }} = {\text{ }}NaCl{\text{ }} + {\text{ }}{H_{\mathbf{2}}}O$
  • C
    $Zn{\text{ }} + {\text{ }}FeS{O_{\mathbf{4}}} = {\text{ }}ZnS{O_{\mathbf{4}}} + {\text{ }}Fe$
  • D
    $Fe{\text{ }} + {\text{ }}ZnS{O_{\mathbf{4}}} = {\text{ }}FeS{O_{\mathbf{4}}} + {\text{ }}Zn$
    Correct
11
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
12
The reaction X + Y => XY indicates that :
  • A
    non metals combine among themselves
    Correct
  • B
    metalloids combine among themselves
  • C
    carbon molecules combine making diamond
  • D
    metals combine among themselves
13
This alloy is :
Question 13 figure 1
  • A
    Bronze
  • B
    Solder
    Correct
  • C
    Brass
  • D
    Alumina
14
Stainless steel has composition that includes :
  • A
    iron, chromium, nickel
    Correct
  • B
    iron, copper, tin
  • C
    iron, carbon
  • D
    iron, zinc, nickel
15
Match the following :Element………………….propertyi) Silicon………………….a) inert gasii) Helium…………………b) solid semi metaliii) Aluminium…………….c) occurs as liquidiv) Bromine………………d) noble metalv) Silver………………….e) amphoteric
  • A
    i.c,ii.e,iii.d, iv.a, v.b
  • B
    i.b,ii.d,iii.e, iv.c, v.a
  • C
    i.b,ii.a,iii.e, iv.c, v.d
    Correct
  • D
    i.d,ii.a,iii.b, iv.e, v.c