CHEMISTRY

    1.       Oxygen family is -------- group.

a)      16^th

b)      15^th

c)       18^th

d)      17^th

    2.       Noble gases belong to ------- group

a)      18^th

b)      17^th

c)       16^th

d)      15^th

    3.       Which among the following is a metalloid?

a)      Carbon

b)      Silicon

c)       Germanium

d)      All of these

    4.       The most abundant element in plants:

a)      Oxygen

b)      Iron

c)      Carbon

d)      Hydrogen

    5.       The constituent of all protein molecules:

a)      Hydrogen

b)      Nitrogen

c)       Calcium

d)      Iron

    6.       Colour of liquid oxygen:

a)      Yellow

b)      Blue

c)       Red

d)      Green

    7.       Example of the neutral solution:

a)      Chloroform

b)      Vinegar

c)       Water

d)      Urine

    8.       The chemical property of a substance is determined by:

a)      Protons

b)      Neutrons

c)      Electrons

d)      None of these

    9.       The raw material for the manufacture of glass:

a)      Sand

b)      Clay

c)       Mica

d)      Salt

    10.   Which is not a pure metal?

a)      Mercury

b)      Gold

c)       Silver

d)      Bronze

    11.   Wax is soluble in:

a)      Benzene

b)      Water

c)      Alcohol

d)      Iodine

    12.   Acid contained in onion:

a)      Oxalic acid

b)      Citric acid

c)       Malic acid

d)      Prussic acid

    13.   Element obtained from seaweeds:

a)      Chlorine

b)      Calcium

c)       Iodine

d)      Magnesium

    14.   What is added to gold to make ornaments?

a)      Copper

b)      Tin

c)       Lead

d)      Aluminium

    15.   Element essential for the functioning of Thyroid gland:

a)      Vanadium

b)      Chlorine

c)       Iodine

d)      Magnesium

    16.   What is known as “Fool’s Gold”?

a)      Iron oxide

b)      Iron Pyrites

c)       Silicon dioxide

d)      Copper sulphate

    17.   Among the following metal which one will float in water?

a)      Aluminium

b)      Zinc

c)       Mercury

d)      Sodium

    18.   The gas obtained from cow dung:

a)      Methane

b)      Chlorine

c)       Ozone

d)      Ammonia

    19.   The most abundant organic compound in nature:

a)      Glucose

b)      Cellulose

c)       Sugar

d)      Benzene

    20.   The water in which soap does not lather easily because of the presence of certain chemicals, known as:

a)      Hard water

b)      Heavy water

c)       Contaminated water

d)      Soft water

    21.   The rarest element:

a)      Rhodium

b)      Platinum

c)       Astatine

d)      Radon

    22.   The setting of plaster of Paris involves which among the following process?

a)      Oxidation

b)      Dehydration

c)       Reduction

d)      None of these

    23.   The glass used to make windshields of motor vehicles:

a)      Flint glass

b)      Safety glass

c)       Pyrex glass

d)      None of these

    24.   Alcohol obtained through the ---------- of sugar solution is Ethanol:

a)      Fermentation

b)      Reduction

c)       Ionisation

d)      None of these

    25.   --------% Acetic acid is known as Glacial Acetic acid:

a)      50

b)      10

c)       25

d)      100