General Science-68

      1.    The three abundant elements in the earth’s crust are aluminium, oxygen and silicon. The correct order of their abundance is:

a.    oxygen, aluminium, silicon

b.    aluminium, silicon, oxygen

c.    oxygen, silicon, aluminium

d.    silicon, oxygen, aluminium

       2.    Penicillin is widely used as:

a.    an antiseptic

b.    a disinfectant

c.    an antibiotic

d.    an insecticide

      3.    Which of the following is the lightest metal?

a.    Mercury

b.    Silver

c.    Lithium

d.    Lead

      4.    The most important ore of Aluminium is:

a.    Bauxite

b.    Calamine

c.    Calcite

d.    Galena

      5.    The element present in the largest amount in rocks and minerals is:

a.    Carbon

b.    Silicon

c.    Hydrogen

d.    Aluminium

      6.    An alloy used in making heating elements for electric heating devices is

a.    Solder

b.    Alloysteel

c.    Nichrome

d.    German Silver

      7.    German Silver is an alloy of :

a.    Copper, Silver & Nickel

b.    Silver, Copper & Aluminium

c.     Zinc, Copper & Nickel

d.    Silver, Zinc & Nickel

      8.    Air is a/an:

a.    Compound

b.    Element

c.    Mixture

d.    Electrolyte

      9.    Which of the following is the best conductor of Electricity?

a.    Ordinary water

b.    Sea water

c.    Boiled water

d.    Distilled water

     10. Balloons are filled with:

a.    Helium

b.    Oxygen

c.    Nitrogen

d.    Argon

     11. The charcoal used to decolourise raw sugar is:

a.    Animal charcoal

b.    Sugar charcoal

c.    Cocoanut charcoal

d.    Wood charcoal

     12. The most abundant metal in the earth’s crust is;

a.    Zinc

b.    Copper

c.    Aluminium

d.    Iron

      13. The gas used to extinguish fire is:

a.    Neon

b.    Nitrogen

c.    Carbon dioxide

d.    Carbon Monoxide

     14. In which of the following activities Silicon Carbide is used?

a.    Making cement and glass

b.    Disinfecting water and ponds

c.    Making castes for statues

d.    Cutting very hard substances

     15. The element common to all acids is:

a.    Oxygen

b.    Hydrogen

c.    Nitrogen

d.    Sulphur

     16. Gobar gas contains mainly:

a.    Methane

b.    Carbon dioxide

c.    Butane

d.    Carbon Monoxide

     17. The most malleable metal is :

a.    Silver

b.    Gold

c.    Aluminium

d.    Sodium

     18. Tetraethyl lead is used as:

a.    Mosquito repellent

b.    Pain Killer

c.     Fire extinguisher

d.    Petrol additive

     19. Which of the following is used in beauty parlours for hair setting?

a.    Phosphorus

b.    Sulphur

c.    Chlorine

d.    Silicon

     20. Which of the following is a non-metal that remains liquid in room temperature?

a.    Bromine

b.    Chlorine

c.    Helium

d.    Phosphorus