Penicillin was invented by:

• Christian Bernard
• Alexander Fleming
• Mc Collum
• William Harvey
Correct Option: B  [ Alexander Fleming ]

Remark:

Who invented Dynamite?

• J B Dunlop
• Alfred Nobel
• James Simons
• Peter Hargreaves
Correct Option: B  [ Alfred Nobel ]

Remark:

Which of the following compounds is used in fire extinguishers ?

• Sodium carbonate
• Sodium bicarbonate
• Sodium nitrate
• Sodium sulphate
Correct Option: B  [ Sodium bicarbonate ]

Remark:

Acid rain is caused due to the pollution of environment by:

• Carbondioxide and Nitrogen
• Carbon monoxide and Carbondioxide
• Ozone and Methane
• Some oxide of Nitrogen and Sulpher
Correct Option: D  [ Some oxide of Nitrogen and Sulpher ]

Remark: Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air

The disease caused by Asbestos is

• Paralysis
• Dysentery
• Emphysema
• Diarrhea
Correct Option: C  [ Emphysema ]

Remark:

In the eye colour vision is effected by the presence of

• Rods
• Choroid coat
• Cones
• Sclerotic coat
Correct Option: C  [ Cones ]

Remark:

Sericuluture is a rearing practice of :

• Fishes
• Silk worm
• Honey bees
• Earth worm
Correct Option: B  [ Silk worm ]

Remark:

The first nuclear test conducted by India under the code name of "Smiling Buddha" was in the year:

• 1973
• 1974
• 1975
• 1976
Correct Option: B  [ 1974 ]

Remark:

Angora wool is extracted from

• rabbit
• sheep
• fox
• goat
Correct Option: A  [ rabbit ]

Remark:

Brass gets discoloured in air due to constant exposure in presence of:

• Aluminium sulphide
• Aluminium phosphide
• Hydrogen sulphide
• Hydrogenated wafers
Correct Option: C  [ Hydrogen sulphide ]

Remark: