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. The gas used in a refrigerator to cool water is :
(a) Nitrogen
(b) Carbon dioxide
(c) Methane
(d) Ammonia
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Answer / mohib sec
Actually Freon is used in Refrigerator but now there use Tetrafluoroethane in refrigerator which dose not deplete the ozone layer. But in your options it may be ammonium gas
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The principle of Conservation of Energy refers to the fact that: (A) it is essential not to waste natural gas and oil for these are limited in supply (B) solar heating makes use of the Sun?s energy, which would otherwise have been wasted (C) energy can neither be created nor be destroyed (D) nuclear power plants recycle spent fuel
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Who amongst the following prepares the estimates of the national income in India? 1 National Centre for policy Research 2 Reserve bank of India 3 National Sample Survey 4 Central Statistical Organisation
5 Answers BBAU Babasaheb Bhimrao Ambedkar University, Delhi University, Police Exam, RBI, SSC,
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which is the largest state in india?
0 Answers BPCL Bharat Petroleum,
UPSC 
