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Q:

A  photon  of  X-ray  has  energy  of  1  keV.  A photon of visible radiation has energy of 3 eV.  In  this  context,  which  one  of  the following statements is not correct?

A) The wavelength of X-ray photon is less than the wavelength of visible radiation photon. B) Both    the    photons    have    different energies.
C) The  speeds  of  both  the  photons  in vacuum are different D) The   frequency   of   X-ray   photon   is higher  than  the  frequency  of  visible radiation photon.
 
Answer & Explanation Answer: C) The  speeds  of  both  the  photons  in vacuum are different

Explanation:

The speed of all the electromagnetic radiation are always   same   and   equal   to   the numerical value 3 x 10^8m/sec.

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Filed Under: Physics
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Q:

Which of the following sources has the largest share in power generation in India?

A) Atomic power B) Thermal power
C) Hydro power D) Wind power
 
Answer & Explanation Answer: B) Thermal power

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Filed Under: General Science
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Q:

The _________ keeps the average temperature of the Earth fairly steady.

A) biosphere B) heliosphere
C) atmosphere D) photosphere
 
Answer & Explanation Answer: C) atmosphere

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Q:

In the 42nd Constitutional Amendment 1976, which word was added to the Preamble?

A) Democratic B) Equality
C) Secular D) Socialist
 
Answer & Explanation Answer: C) Secular

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Filed Under: Indian Politics

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Q:

Who was the first Indian to be elected as the leader of the Communist International?

A) Jawaharlal Nehru B) P.C. Joshi
C) Sardar Vallabhai Patel D) M.N Roy
 
Answer & Explanation Answer: D) M.N Roy

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Q:

First Leader of opposition in Lokshabha was _____.

A) B. R. Ambedkar B) A. K. Gopalan
C) S Radhakrishnan D) Vallabhbhai Patel
 
Answer & Explanation Answer: B) A. K. Gopalan

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Q:

Which of the following is usually not an air­pollutant?

A) Hydrocarbons B) Sulphur dioxide
C) Carbon dioxide D) Nitrous oxide
 
Answer & Explanation Answer: D) Nitrous oxide

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Filed Under: Chemistry

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Q:

Beryl is an ore/mineral of

A) Nickel B) Beryllium
C) Lead D) Tin
 
Answer & Explanation Answer: B) Beryllium

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Filed Under: Chemistry
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