The sky looks blue due to:
- (A) The scattering of sunlight by the atmosphere
- (B) The presence of water vapors in the air
- (C) Absorption of blue light by the atmosphere
- (D) Presence of CO2 in the atmosphere
- (A) The scattering of sunlight by the atmosphere
Which is the nearest planet to the sun?
- (A) Mercury
- (B) Venus
- (C) Mars
- (D) Neptune
- (A) Mercury
The S.I unit of radioactivity is:
- (A) Joule
- (B) Becquerel
- (C) Watt
- (D) Decibel
- (B) Becquerel
One light-year is approximately equal to:
- (A) 6.46 trillion km
- (B) 7.46 trillion km
- (C) 8.46 trillion km
- (D) 9.46 trillion km
- (D) 9.46 trillion km
Electric field lines of force are:
- (A) Imaginary lines
- (B) Physically existed
- (C) Depended upon case
- (D) Existed positive charges
- (A) Imaginary lines
All among the following contribute to pollution, EXCEPT:
- (A) Thermal power plants
- (B) Automobiles
- (C) Nuclear power plants
- (D) Hydro-electric power plant
- (D) Hydro-electric power plant
Which of the following is not a contagious disease?
- (A) Typhoid
- (B) Hysteria
- (C) Measles
- (D) Influenza
- (B) Hysteria
Soil pollution is caused by:
- (A) Aerosol
- (B) Ozone
- (C) Acid rain
- (D) All of these
- (D) All of these
Alfred Nobel is associated with the great invention of:
- (A) Cosmic rays
- (B) Dynamite
- (C) Dynamo
- (D) Penicillin
- (B) Dynamite
The part of cell which is essential for protein synthesis is:
- (A) Chloroplast
- (B) Ribosome
- (C) Golgi bodies
- (D) Chromosomes
- (B) Ribosome
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