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Nitrogen constitutes nearly- % of the atmosphere.

1. A 42
2. B 57
3. C 65
4. D 79

Main cause of night blindness is deficiency of Vitamin---

1. A A
2. B B
3. C C
4. D E

Study of earthquakes is known as--

1. A Ecology
2. B Numismatic
3. C Physiology
4. D Seismology

"To every action there is an equal and oposite reaction"-- this theory has been given by--

1. A Alexander
2. B Archimedes
3. C Copernicus
4. D Newton

Wher is the headquarters of the UN Security council located at?

1. A New York
2. B Paris
3. C Tokyo
4. D Washington

Among the following which is the purest form of iron?

1. A grey cast iron
2. B steel
3. C white cast iron
4. D wrought iron

Albert Eainstein was born in which country?

1. A Germany
2. B Italy
3. C Russia
4. D USA

How many colors the sunlight spectrum has?

1. A five
2. B four
3. C seven
4. D three

Which of the following can be used both as an oxidizing agent and as a reducing agent?

1. A sodium nitrate
2. B sodium nitrite
3. C sodium sulphide
4. D sodium thiosulphate

What type of iron is obtained from blast furnace?

1. A cast iron
2. B pig iron
3. C soft iron
4. D wrought iron

Which one is a renewable energy source?

1. A Coal
2. B Gas
3. C Petroleum
4. D Wind

The credit of developing the polio vaccine goes to--

1. A Alb E. Sabin
2. B John Sleeman
3. C Jonas Salk
4. D Selman Waksman