CSS Past Papers Everyday Science 2011 Test - 3

CSS Past Papers
Everyday Science 2011
Test - 3

1. The density of water is greatest at?

a) 32°C
b) 0°C
c) 4°C
d) 100°C
e) None of these

2. 21.Which one of the following statements is true?

a) Gases do not conduct heat
b) The best conductors are non-metals
c) Conduction currents occur only in liquids
d) A vacuum cannot conduct heat
e) None of the statements is true+.

3. Ice can be changed to water by?

a) Adding more water molecules
b) Changing the motion of the water molecules
c) Rearranging the atoms in water molecules
d) Destroying the atoms in water molecules
e) None of these

4. The building blocks of elements are called?

a) Atoms
b) Molecules
c) Compounds
d) Isotopes
e) None of these

5. Boiling of an egg is a change which is?

a) Physical
b) Chemical
c) Physiological
d) Morphological
e) None of these

6. The temperature of liquid nitrogen is?

a) -32°C
b) -80°C
c) -100°C
d) -196°C
e) None of these

7. Which one of the following is an alkali?

a) water
b) vinegar
c) lemon juice
d) slaked lime
e) None of these

8. If an alkali is slowly added to an acidic solution, the pH of the acidic solution will?

a) Increase
b) Decrease
c) Increase to 7 and then decrease
d) Decrease to 7 and then increase
e) Will remain same

9. The usual raw material for ceramics, generally found beneath the top soil is?

a) Sand
b) Slit
c) Clay
d) Plaster of Paris
e) Melamine

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