Chemistry General Knowledge Questions Practice Question and Answer

Q:

The tendency to give up electrons is called-

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  • 1
    Oxidation
    Correct
    Wrong
  • 2
    Reduction
    Correct
    Wrong
  • 3
    Catalysis
    Correct
    Wrong
  • 4
    Motivation
    Correct
    Wrong
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Answer : 1. "Oxidation "

Q:

What is the common name of CaoCl2?

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  • 1
    Washing Soda
    Correct
    Wrong
  • 2
    Bleaching Powder
    Correct
    Wrong
  • 3
    Baking Powder
    Correct
    Wrong
  • 4
    Baking Soda
    Correct
    Wrong
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Answer : 2. "Bleaching Powder "

Q:

The catalyst is a substance through which the rates of chemical reactions ________.

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  • 1
    Decreases
    Correct
    Wrong
  • 2
    Changes
    Correct
    Wrong
  • 3
    Increases
    Correct
    Wrong
  • 4
    None of these
    Correct
    Wrong
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Answer : 3. "Increases "

Q:

A radio-active substance has a half life of six months. Three-fourth of the substance will decay in____.

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  • 1
    Six months
    Correct
    Wrong
  • 2
    Ten months
    Correct
    Wrong
  • 3
    Twelve months
    Correct
    Wrong
  • 4
    Twenty four months
    Correct
    Wrong
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Answer : 3. "Twelve months"

Q:

Nowadays yellow lamps are being used in abundance in street lights. Which of the following gas are used in these lamps?

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  • 1
    Sodium
    Correct
    Wrong
  • 2
    Neon
    Correct
    Wrong
  • 3
    Hydrogen
    Correct
    Wrong
  • 4
    Nitrogen
    Correct
    Wrong
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Answer : 1. "Sodium"

Q:

Water in case of HCl acts as a/an ___________, in case of ammonia acts as a/an ________

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  • 1
    Base, base
    Correct
    Wrong
  • 2
    Base, acid
    Correct
    Wrong
  • 3
    Acid, base
    Correct
    Wrong
  • 4
    Acid, acid
    Correct
    Wrong
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Answer : 2. "Base, acid "

Q:

In which process is a protective zinc coating applied on iron to prevent it from rusting?

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  • 1
    Galvanisation
    Correct
    Wrong
  • 2
    Annealing
    Correct
    Wrong
  • 3
    Smelting
    Correct
    Wrong
  • 4
    Welding
    Correct
    Wrong
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Answer : 1. "Galvanisation"

Q:

Which of the following has the least melting point?

1210 1

  • 1
    Carbon
    Correct
    Wrong
  • 2
    Silver
    Correct
    Wrong
  • 3
    Mercury
    Correct
    Wrong
  • 4
    Gold
    Correct
    Wrong
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Answer : 3. "Mercury "

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