Question Number: 81-90

81- The three primary colours are
(a) Green, Yellow, Red
(b) Blue, Yellow, Red
(c) Blue, Red, Green
(d) Blue, Yellow, Green

Ans.: (b)

82- The smallest unit of computer data is
(a) Bit
(b) Byte
(c) Mega byte
(d) Kilo byte

Ans.: (a)
83- Wi MAX is related to which one of the following?
(a) Biotechnology
(b) Space technology
(c) Missile technology
(d) Communication technology

Ans.: (d)

84- Acid Rain is caused due to the presence of the following gases in the air?
(a) N2 and O3
(b) NH3 and Cl2
(c) SO2 and NO2
(d) O3 and N2

Ans.: (c)
85- The sky appears blue due to
(a) Refraction
(b) Reflection
(c) Scattering
(d) Dispersion

Ans.: (c)

86- Which one of the following radio active elements is found in large amounts in India?
(a) Radium
(b) Thorium
(c) Plutonium
(d) Uranium

Ans.: (b)
87- The number of Chromosome pairs in human body is
(a) 23
(b) 42
(c) 46
(d) None of the above

Ans.: (a)

88- A Jet engine works on the Principle of Conservation of
(a) Energy
(b) Mass
(c) Linear momentum
(d) Angular momentum

Ans.: (c)
 
89- Which one of the following is the best conductor of heat
(a) Water
(b) Mercury
(c) Wood
(d) Leather

Ans.: (b)

90- Heavy Water is
(a) ice
(b) water at 4.C
(c) solution of sugar in water
(d) deuterium oxid

Ans.: (d)

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