1711. Which of the following statements is true ?

A. Gases doesnot conduct beat
B. The best conductors are non metals
C. Conduction currents occurs only in liquids
D. A vaccum cannot conduct heat
E. None of the statement above *

1712. 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. None of these

1713. The building block of elements are called :

A. Atoms *
B. Molecules
C. Physiological
D. Morphological
E None of these

1714. Boiling of an egg is a change which is :

A. Physical *
B. Chemical
C. Physiological
D. Mrophphological

1715. The temperature of liquid nitrogen is :

A. -32 Degree centigrade
B. -80 Degree centigrade
C. -100 Degree centigrade
D. -196 Degree centigrade *

1716. Which one of the following is an al Kali ?

A. Water
B. Vinegar
C. lemon juice
D. Slaked line *

1717. If an alkali is slowly mixed 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

1718. The usual raw material for ceramics generally found beneath the top soil is ?

A. Sand
B. Silt
C. Clay *
D. Plaster of paris

1719. Polyamides are synthetic polymers commonly known as :

A. Synthetic rubber
B. Nylon *
C. Cellulose
D. Protein

1720. Telephone was invented in 1876 in America by :

A. Marconi
B. Galileo
C. John Beard
D. Graham Bell *