Chemistry Quiz for Class 10

  • Question of

    When an acid reacts with metal carbonate, the products are ______.

    • salt
    • water
    • carbon dioxide
    • all of the above
  • Question of

    Phenolphthalein in acidic solution is ______.

    • colorless
    • pink colored
    • yellow colored
    • orange colored
  • Question of

    The process in which acids (H+) and bases (OH-) react to form salts and water is called ______.

    • neutralization
    • hydrogenation
    • halogenation
    • sublimation
  • Question of

    Strand of RNA is made of ______.

    • ribose sugar
    • phosphate unit
    • nitrogen base
    • all of the above
  • Question of

    Which of the following activates more than 100 different enzymes?

    • vitamin A
    • vitamin B
    • vitamin C
    • vitamin D
  • Question of

    Which of the following is not included in fat-soluble vitamins?

    • vitamin A
    • vitamin B
    • vitamin E
    • vitamin D
  • Question of

    How many replaceable H-atoms are present in Carbonic acid?

    • 2
    • 3
    • 4
    • 5
  • Question of

    Na2SO4 is a/an ______.

    • normal salt
    • acid salt
    • basic salt
    • common salt
  • Question of

    Art that uses acid to crave patterns into a metal, glass and other materials is called ______.

    • painting
    • etching
    • calligraphy
    • acid art
  • Question of

    In equilibrium constant expression, the concentration of products is taken in/on the ______.

    • right side
    • left side
    • numerator
    • denominator
  • Question of

    The rate at which the reaction proceeds is directly proportional to the product of the active masses of ______.

    • products
    • reactants
    • catalysts
    • none of the above
  • Question of

    Which of the following is the correct representation for “active mass”?

    • ( )
    • { }
    • [ ]
    • none of the above
  • Question of

    Ore of iron is called ______.

    • hematite
    • chalcopyrite
    • bauxite
    • halite
  • Question of

    Ore of silicon is called ______.

    • galena
    • zinc blende
    • Cassiterite
    • silica
  • Question of

    The boiling point of fuel oil is _______.

    • 270 °C to 340 °C
    • 350 °C to 500 °C
    • 500 °C to 600 °C
    • more than 600 °C
  • Question of

    What is the source of lead compounds?

    • Aerosol sprays foams
    • Exhaust fumes of motor vehicles
    • Incomplete burning of wood
    • None of the above
  • Question of

    The atmosphere is divided into how many layers?

    • 2
    • 3
    • 4
    • 5
  • Question of

    Percentage of hydrogen in the air is ______.

    • 0.99
    • 0.8
    • 0.5
    • 0.25
  • Question of

    The hardness that cannot be removed by boiling is called ______.

    • temporary hardness
    • permanent hardness
    • semi temporary hardness
    • semi permanent hardness
  • Question of

    The density of water becomes maximum at ______.

    • 10 °C
    • 4 °C
    • 5 °C
    • 3 °C
  • Question of

    Which of the following is the most abundant salt in seawater?

    • Magnesium chloride
    • Calcium chloride
    • Sodium chloride
    • Sodium nitrate
  • Question of

    When two carbon atoms share two electron pairs then they form ______.

    • single bond
    • double bond
    • triple bond
    • none of the above
  • Question of

    All are wrong about alkenes, but that they are _______.

    • saturated hydrocarbons
    • soluble in water
    • unsaturated hydrocarbons
    • insoluble in organic solvents
  • Question of

    What is the physical state of the first four alkanes?

    • Solid
    • Liquid
    • Gas
    • Plasma
  • Question of

    As compared to its parent alkane, an alkyl radical contains one ______.

    • less carbon
    • less hydrogen
    • more carbon
    • more hydrogen
  • Question of

    The self-linking ability of carbon is called ______.

    • catenation
    • sublimation
    • hydrogenation
    • carbonation
  • Question of

    Almost 95% of compounds are of carbon because they can form ______.

    • single bonds
    • double bonds
    • triple bonds
    • multiple bonds
  • Question of

    The atmosphere is divided into ______.

    • 1 layers
    • 2 layers
    • 3 layers
    • 4 layers
  • Question of

    The mass of atmosphere contained in the troposphere is about ________.

    • 10-20%
    • 75-80%
    • 90-100%
    • 50-60%
  • Question of

    The maximum amount of ozone (O3) is present in _______.

    • troposphere
    • stratosphere
    • mesosphere
    • thermosphere

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