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Q.

Which of the following is the strongest bond?

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a

Sn—Sn

b

Ge—Ge

c

Si—Si

d

C—C

answer is A.

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Detailed Solution

Bond energies (kJ mol-1 ) are : C—C 348; Si—Sf 297; Ge—Ge 260; Sn—Sn 240

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