Q: A heavy stone appears to be lighter in water. This is due to

A: Upward pressure of water

B: Downward pressure of water

C: Lateral pressure of water

D: None of these



Upward pressure of water


Q: Usually OMR sheets are used in most of the competitive examinations. The full form of OMR is :

A: Optical Mark Response

B: Optical and Magnetic Reader

C: Optical and Magnetic Record

D: Optical Mark Recognition



Optical Mark Recognition


Q: The virus infection causes AIDS is known as

A: HIV

B: HID

C: DIV

D: None of theses



HIV


Q: Which of the following is a source of non-conventional energy?

A: Firewood

B: Diesel

C: Petrol

D: Biogas



Biogas


Q: The animal group that is not found in marine water:

A: Mammals

B: Amphibia

C: Reptiles

D: Aves



Aves


Q: Who discovered electromagnetic nature of light?

A: Young

B: Snell

C: Newton

D: Maxwell



Maxwell


Q: Which is an example of pollution-free energy?

A: Coal

B: Wind energy

C: Mineral oil

D: None of these



Wind energy


Q: Who had discovered oxygen?

A: Rutherford

B: William Harvey

C: Priestly

D: Galileo



Priestly


Q: Hydro?uoric acid is not kept in glass bottles because it reacts with:

A: visible light

B: sodium oxide of glass

C: aluminium oxide of glass

D: silicon dioxide of glass



silicon dioxide of glass


Q: Indian Space Research Organisation (ISRO) is located in :

A: Bombay

B: Hyderabad

C: Bangalore

D: Trombay



Bangalore
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