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116. Lamberts law is related to

A. Reflection

B. Refraction

C. Interference

D. Illumination

Explanation:

117. Cyclotron is a device to produce high speed ions. It was developed by

A. Lawrence and Livingston

B. Davisson and Germer

C. Hess and Anderson

D. Cockroft and Walton

Explanation:

118. Sodium thiosulphate is used in photography because

A. it is an oxidising agent.

B. it is a reducing agent.

C. it reacts with light.

D. it helps in fixing the photograph.

Explanation:

119. Hargobind Khurana is credited for the discovery of

A. synthesis of proteins

B. synthesis of genes

C. synthesis of nitrogenous bases

D. None of these

Explanation:

120. Which of the following pairs of discovery and discoveres is not correct ?

A. Fountain Pen - Waterman

B. Safety Rozor - Gillette

C. Paper - Tilghman

D. Safety pin - Hunt

Explanation:

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