General Science-69

     1.    From which mineral is radium obtained:

a.    Limestone

b.    Haematitie

c.    Pitchblende

d.    Rutile

     2.    What is laughing gas?

a.    Carbon dioxide

b.    Sulphur dioxide

c.    Nitrogen Dioxide

d.    Nitrous oxide

     3.    Which of the following is used as a material for making protective windows in space probes?

a.    Steel

b.    Graphite

c.    Tungsten

d.    Diamond

     4.    Which form of phosphorus is used in safety metals?

a.    Red Phosphorus

b.    White Phosphorus

c.    Yellow Phosphorus

d.    Black Phosphorous

     5.    Stainless steel is an alloy of :

a.    Iron, Carbon and Nickel

b.    Iron and Manganese

c.    Iron, Chromium and Zinc

d.    Iron, Chromium and Nickel

     6.    Which of the following is not correctly matched?

a.    Galena : Lead Sulphide

b.    Green vitriol : Copper sulphate

c.    Plaster of Paris : Calcium sulphate

d.    Calomel : Mercurous Chloride

     7.    Which of the following metals forms an amalgum with other metals?

a.    Lead

b.    Tin

c.    Zinc

d.    Mercury

     8.    Which of the following is not an ore of Aluminium?

a.    Felsper

b.    Bauxite

c.    Cryolite

d.    Azurite

     9.    Most soluble in water is:

a.     Camphor

b.    Sugar

c.    Sulphur

d.    Common Salt

     10.  Bromine is:

a.    colourless gas insoluble in water

b.    A highly inflammable gas

c.    A Black solid.

d.    A red liquid.

     11.  The metal used in storage batterie:

a.    Iron

b.    Copper

c.    Lead

d.    Zinc

     12.  Water has maximum density at:

a.    :4°C

b.    0°C

c.    4°C

d.    100°C

     13.  The chemial name of Uria is:

a.    Aneurin

b.    Chloroetane

c.    Carbamide

d.    None of these

     14.  Permanent hardness of water can be removed by adding:

a.    Potassium Permanganate

b.    Chlorine

c.    Bleaching Powder

d.    Washing Soda

     15.  The formula of Plaster of Paris is:

a.    CaSO₄

b.     CaSO₄, 2H₂O

c.     2CaSO₄, 4H₂O

d.     2CaSO₄, H₂O

      16.  Which of the following substance is a bad conductor of electricity but a good conductor of heat?

a.    Asbestos

b.    Celluloid

c.    Purspecks

d.     Mica

     17.  Carborandum is:

a.    Silicon Dioxide

b.    Silicon Carbide

c.    Silicon Nitride

d.    Silicon Phosphide

     18.  Which of the following is the best conductor of electricity?

a.    Copper

b.    Mica

c.    Zinc

d.    Silver

     19.  Washing soda is the common name of:

a.    Calcium Carbonate

b.    Calcium Bi-Carbonate

c.    Sodium Carbonate

d.    Sodium Bi-Carbonate

     20.  The filament of electric bulb is made of:

a.    Iron

b.    Nichrome

c.    Tungsten

d.    Graphite