Chemistry Questions Practice Question and Answer

Q:

A pungent small often present near the urinals is due to

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  • 1
    Ammonia
    Correct
    Wrong
  • 2
    Urea
    Correct
    Wrong
  • 3
    Sulphur- di-oxide
    Correct
    Wrong
  • 4
    Chlorine
    Correct
    Wrong
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Answer : 1. "Ammonia "

Q:

The substances used for artificial rain is

2014 0

  • 1
    Silver iodide
    Correct
    Wrong
  • 2
    Silver bromide
    Correct
    Wrong
  • 3
    Ammonium nitrate
    Correct
    Wrong
  • 4
    All of the above
    Correct
    Wrong
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Answer : 1. "Silver iodide "

Q:

If the pH value of a substance is lower than 7, it would be considered as–

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  • 1
    Neutral
    Correct
    Wrong
  • 2
    Base
    Correct
    Wrong
  • 3
    Acid
    Correct
    Wrong
  • 4
    Ion
    Correct
    Wrong
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Answer : 3. "Acid"

Q:

Which of the following is the most common kidney stone-forming compound?

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  • 1
    Calcium oxalate
    Correct
    Wrong
  • 2
    Magnesium oxide
    Correct
    Wrong
  • 3
    Sodium bicarbonate
    Correct
    Wrong
  • 4
    Magnesium citrate
    Correct
    Wrong
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Answer : 1. "Calcium oxalate"

Q:

What is the mass number of an element, the atom of which contains two Protons, two neutrons and two electrons? 

1225 0

  • 1
    2
    Correct
    Wrong
  • 2
    4
    Correct
    Wrong
  • 3
    6
    Correct
    Wrong
  • 4
    8
    Correct
    Wrong
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Answer : 2. "4 "

Q:

The air is the example of:

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  • 1
    The solution of solid in the gas
    Correct
    Wrong
  • 2
    The solution of gas in the gas
    Correct
    Wrong
  • 3
    The solution of liquid in the gas
    Correct
    Wrong
  • 4
    The solution of liquid in the solid
    Correct
    Wrong
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Answer : 2. "The solution of gas in the gas"

Q:

In which of the following chlorine has + 1 oxidation number?

1186 0

  • 1
    Zinc chloride
    Correct
    Wrong
  • 2
    Chlorine
    Correct
    Wrong
  • 3
    Hypochlorous acid
    Correct
    Wrong
  • 4
    Hydrochloric acid
    Correct
    Wrong
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Answer : 3. "Hypochlorous acid"

Q:

What is the role of a positive catalyst in a chemical reaction? 

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  • 1
    It increases the rate of reaction
    Correct
    Wrong
  • 2
    It decreases the rate of reaction
    Correct
    Wrong
  • 3
    It increases the yield of the products
    Correct
    Wrong
  • 4
    It provides better purity of the products
    Correct
    Wrong
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Answer : 1. "It increases the rate of reaction "

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