General Science-109

1.       Which of the following gas is not known as green house gas?

a.       Methane

b.      Carbon dioxide

c.       Nitrous oxide

d.      CFC

2.       Which of the following is not a neutral oxide?

a.       Carbon Monoxide

b.      Sulphur Dioxide

c.       Water

d.      Nitric Oxide

3.       Which of the following is used in making smoke bombs?

a.       Sulphur

b.      Phosphorus

c.       Hydrogen

d.      Carbon

4.       Caustic Soda is:

a.       Nacl

b.      Na2CO3

c.       NaOH

d.      NaHCO3

5.       Chemical formula of Water glass is:

a.       Na2SiO3

b.      Al2O3

c.       NaAlO2

d.      CaSiO3

6.       Which of the following is not a bleaching agent?

a.       Sulpher dioxide

b.      Carbon dioxide

c.       Sodium hypochlorite

d.      Chlorine

7.       Heavy water is:

a.       Tritium oxide

b.      Deuterium oxide

c.       Rain water

d.      Water at 4°C

8.       The gases used in different types of welding would include:

a.       Oxygen & Hydrogen

b.      Oxygen, acetylene & argon

c.       Oxygen & acetylene

d.      Oxygen, hydrogen & nitrogen

9.       Which of the following alloys is used for making magnets?

a.       Duralumin

b.      Stainless Steel

c.       Alnico

d.      Magnelium

10.  Which of the following is the lightest metal ?

a.       Mercury

b.      Silver

c.       Lithium

d.      Lead

11.  The most important ore of Aluminium is:

a.       Bauxite

b.      Calamine

c.       Calcite

d.      Galena

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

a.       Carbon

b.      Silicon

c.       Hydrogen

d.      Aluminium

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

a.       Solder

b.      Alloysteel

c.       Nichrome

d.      German Silver

14.  German Silver is an alloy of:

a.       Copper, Silver & Nickel

b.      Silver, Copper & Aluminium

c.       Zinc, Copper & Nickel

d.      Silver, Zinc & Nickel

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

a.       Ordinary water

b.      Sea water

c.       Boiled water

d.      Distilled water

16.  The most abundant metal in the earth’s crust is:

a.       Zinc

b.      Copper

c.       Aluminium

d.      Iron

17.  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

18.  The element common to all acids is:

a.       Oxygen

b.      Hydrogen

c.       Nitrogen

d.      Sulphur

19.  Gobar gas contains mainly:

a.       Methane

b.      Carbon dioxide

c.       Butane

d.      Carbon Monoxide

20.  The most malleable metal is:

a.       Silver

b.      Gold

c.       Aluminium

d.      Sodium