Q.

1 g of hydrogen is converted into 0.993 g of helium in a thermonuclear reaction. The energy released is

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a

63 x 107 J

b

63 x 1010 J

c

63 x 1014J

d

63 x 1020J

answer is B.

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Detailed Solution

Δm=1−0.993=0.007gm∴E=Δmc2=0.007×10−33×1082                               =63×1010J
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1 g of hydrogen is converted into 0.993 g of helium in a thermonuclear reaction. The energy released is