Chemistry Practice Question and Answer

Q:

Which of the following reactions always have pairs together?

813 0

  • 1
    combination and dissolution
    Correct
    Wrong
  • 2
    precipitation and displacement
    Correct
    Wrong
  • 3
    neutralization and displacement
    Correct
    Wrong
  • 4
    Oxidation and degradation
    Correct
    Wrong
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Answer : 4. "Oxidation and degradation"

Q:

Gas is produced by the reaction of steam on iron?

812 0

  • 1
    Hydrogen gas
    Correct
    Wrong
  • 2
    Oxygen gas
    Correct
    Wrong
  • 3
    ammonia gas
    Correct
    Wrong
  • 4
    Nitrogen gas
    Correct
    Wrong
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Answer : 1. "Hydrogen gas"

Q:

On heating copper powder in air, a layer of copper oxide accumulates on its surface. What is the color of this layer?

808 0

  • 1
    Black
    Correct
    Wrong
  • 2
    White
    Correct
    Wrong
  • 3
    Yellow
    Correct
    Wrong
  • 4
    Brown
    Correct
    Wrong
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Answer : 1. "Black"

Q:

In which state of matter, the distance between the molecules is minimum ?

808 0

  • 1
    Solid
    Correct
    Wrong
  • 2
    Liquid
    Correct
    Wrong
  • 3
    Gas
    Correct
    Wrong
  • 4
    Plasma
    Correct
    Wrong
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Answer : 1. "Solid"

Q:

Herbs- The decomposition of vegetables into compost is an example of which reaction?

803 0

  • 1
    endothermic
    Correct
    Wrong
  • 2
    exothermic
    Correct
    Wrong
  • 3
    substitution
    Correct
    Wrong
  • 4
    Amphibian
    Correct
    Wrong
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Answer : 2. "exothermic"

Q:

Which of the following laws suggest a direct relationship between Temperature and Volume of a gas?

803 0

  • 1
    Avogadro rule
    Correct
    Wrong
  • 2
    Charles rule
    Correct
    Wrong
  • 3
    Boyle rule
    Correct
    Wrong
  • 4
    None of these
    Correct
    Wrong
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Answer : 2. "Charles rule"

Q:

What type of chemical reaction is combustion of natural gas?

801 0

  • 1
    combination reaction
    Correct
    Wrong
  • 2
    decomposition reaction
    Correct
    Wrong
  • 3
    exothermic reaction
    Correct
    Wrong
  • 4
    dissolution reaction
    Correct
    Wrong
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Answer : 3. "exothermic reaction"

Q:

The alloy of lead and tin is called?

799 0

  • 1
    Steel
    Correct
    Wrong
  • 2
    metalloids
    Correct
    Wrong
  • 3
    Gun Maton
    Correct
    Wrong
  • 4
    solder
    Correct
    Wrong
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Answer : 4. "solder"

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