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Inventions and Discoveries


13. 

Match List I correctly with List II and select your answer using the codes given below:

List I List II
a) Ionosphere 1) Volta
b) Black holes 2) S.Chandrasekar
c) Electric battery 3) E.V.Appleton
d) Electro magnetic waves 4) Hertz

Answer : D. a-3 ,b-2 ,c-1 ,d-4

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14. 

Match List I correctly with List II and select your answer using the codes given below:

List I List II
a) Radium 1) Roentgen
b) X-ray 2) Alexander Flemming
c) Penicillin 3) Einstein
d) Relativity 4) Madam Curie

Answer : C. a-4 ,b-1 ,c-2 ,d-3

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15. 

Einstein was awarded Nobel Prize for

Answer : B. Photo electric effect

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16. 

Wave theory was proposed by

Answer : B. Huygen

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17. 

Printing for the blind was introduced by

Answer : B. Louis Braille

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18. 

Chadwick discovered

Answer : D. neutron

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