Chemistry GK Practice Question and Answer

Q:

An acid must contain mainly one atom which reacts with the metal to produce a gas.

806 0

  • 1
    Hydrogen
    Correct
    Wrong
  • 2
    oxygen
    Correct
    Wrong
  • 3
    Nitrogen
    Correct
    Wrong
  • 4
    Ammonia
    Correct
    Wrong
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Answer : 1. "Hydrogen"

Q:

What type of acid is found in curd?

978 0

  • 1
    lactic acid
    Correct
    Wrong
  • 2
    citric acid
    Correct
    Wrong
  • 3
    Oxalic acid
    Correct
    Wrong
  • 4
    Others
    Correct
    Wrong
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Answer : 1. "lactic acid"

Q:

What is the pH value of sodium hydroxide?

1083 0

  • 1
    11
    Correct
    Wrong
  • 2
    12
    Correct
    Wrong
  • 3
    13
    Correct
    Wrong
  • 4
    14
    Correct
    Wrong
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Answer : 4. "14"

Q:

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

816 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:

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

824 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:

What type of chemical reaction is combustion of natural gas?

814 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:

Which of the following is the softest?

1214 0

  • 1
    Sodium
    Correct
    Wrong
  • 2
    Copper
    Correct
    Wrong
  • 3
    Iron
    Correct
    Wrong
  • 4
    Aluminum
    Correct
    Wrong
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Answer : 1. "Sodium"

Q:

There is abundant available metal in the crust?

922 0

  • 1
    SI
    Correct
    Wrong
  • 2
    FE
    Correct
    Wrong
  • 3
    AL
    Correct
    Wrong
  • 4
    CU
    Correct
    Wrong
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Answer : 3. "AL"

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