Chemistry Questions Answers

  • 85. What is the chemical name of table salt ?

    1. Sodium nitrate
    2. Ammonium chloride
    3. Sodium chloride
    4. Calcium chloride
    Answer And Explanation

    Answer: Option C

  • 86. Why is phosphorus kept under water ?

    1. to make it wet
    2. to make it durable
    3. water forms a protective coating on it
    4. to save it from catching fire when exposed to dry air
    Answer And Explanation

    Answer: Option D

  • 87. What is extracted from Bauxite ?

    1. Mica
    2. Aluminium
    3. Copper
    4. Tin
    Answer And Explanation

    Answer: Option B

  • 88. Brass is an alloy of ?

    1. Copper and Tin
    2. Copper and Zinc
    3. Copper and Aluminium
    4. Iron and Copper
    Answer And Explanation

    Answer: Option B

  • 89. Contact lenses are made from ?

    1. Polyvinyl chloride
    2. Teflon
    3. Polystyrene
    4. Lucite
    Answer And Explanation

    Answer: Option A

  • 90. Which gas is filled in refrigerators ?

    1. Chlorofluorocarbon
    2. Acetylene
    3. Methane
    4. Butane
    Answer And Explanation

    Answer: Option A

  • 91. The single acid which dissolves gold is ?

    1. Aqua regia
    2. Hydrochloric acid
    3. Nitric acid
    4. Selenic acid
    Answer And Explanation

    Answer: Option A