Class 8 Coal And Petroleum CBSE Questions & Answers

Class 8 · Coal And Petroleum

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

Questions & Answers

1
Read the following statements :i) Conservation is maintaining the quality of resources.ii) Conservation is preventing wastage of resources.
  • 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
2
The energy of fossil fuels is derived :
  • A
    directly from dead plant & animals
  • B
    indirectly from sun
    Correct
  • C
    directly from sun
  • D
    indirectly from dead plant & animals
3
Read the following statements :i) Fuel is a substance which burns to give off heat.ii) Fuel can be used to produce heat at an unreasonable cost.
  • A
    both are wrong
  • B
    both are correct
  • C
    statement ii) is correct but i) is wrong
  • D
    statement i) is correct but ii) is wrong
    Correct
4
Coke is better fuel than coal because :
  • A
    it burns without smoke
    Correct
  • B
    it burns with useful smoke
  • C
    it burns to produce heat
  • D
    it is used for domestic cooking
5
Read the following statements :i) Destructive distillation of coal is carried out in the presence of air.ii) Destructive distillation of coal is carried out in the absence of air.
  • A
    statement i) is correct but ii) is wrong
  • B
    both are correct
  • C
    both are wrong
  • D
    statement ii) is correct but i) is wrong
    Correct
6
Coke is used in the manufacture of :i) producer gas by passing air through red hot cokeii)water gas by passing steam over white hot coke
  • A
    both are wrong
  • B
    statement ii) is correct but i) is wrong
  • C
    statement i) is correct but ii) is wrong
  • D
    both are correct
    Correct
7
This product of distillation was earlier used for domestic cooking and lighting but not much used now, it is?
  • A
    coal tar
  • B
    coke
  • C
    coal gas
    Correct
  • D
    charcoal
8
Crude oil is obtained by drilling through earth and :
  • A
    porous rocks
  • B
    non porous rocks
  • C
    impervious rocks
  • D
    both non porous rocks & impervious rocks
    Correct
9
Petroleum is a mixture of hydrocarbons and boiling point of hydrocarbon increases with :
  • A
    decrease in the number of carbon atoms
  • B
    decrease in the number of hydrogen atoms
  • C
    increase in the number of hydrogen atoms
  • D
    increase in the number of carbon atoms
    Correct
10
The components of petroleum which are separated during refining can be called :
  • A
    constituents
  • B
    residues
  • C
    volatile parts
  • D
    fraction
    Correct
11
All statements about natural gas are correct except :
  • A
    it is a non polluting fuel
  • B
    it cannot be transported through pipes
    Correct
  • C
    it can be stored under high pressure
  • D
    it is chiefly made up of methane
12
_____ is the household coal.
  • A
    bituminous (
    Correct
  • B
    peat
  • C
    anthracite
  • D
    lignite
13
All are natural sources of energy except :
  • A
    all the above
  • B
    Wind energy
  • C
    Electrical energy
    Correct
  • D
    Solar energy
14
We can prevent energy crisis by using :
  • A
    not using energy at all
  • B
    unreasonable use of energy
  • C
    energy judiciously
    Correct
  • D
    only biogas as fuel
15
The ultimate source of fossil fuels is :
  • A
    cyclone
  • B
    sun
    Correct
  • C
    wind
  • D
    earthquake