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Q.

Given below are two statements. 

Statement I : The presence of weaker π- bonds make alkenes less stable.
Statement II : The strength of the double bond is greater than that of carbon-carbon single bond. 

In the light of the above statements, choose the correct answer from the options given below.

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a

Statement I is correct but Statement II is incorrect.

b

Statement I is incorrect but Statement II is correct.

c

Both Statement I and Statement II are correct.

d

Both Statement I and Statement II are incorrect.

answer is A.

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Detailed Solution

As we know that C-C needs an energy of around 80 kcal/mole and pi bond needs around 60. Hence C=C needs around 140 and C-C only 80. Note: The values are general not specific.

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Given below are two statements. Statement I : The presence of weaker π- bonds make alkenes less stable.Statement II : The strength of the double bond is greater than that of carbon-carbon single bond. In the light of the above statements, choose the correct answer from the options given below.