Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 12 - Electronic Effects & Applications>EXERCISE>Q 25

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Stability order of the following carbocations is:

(I) $C_{6} H_{5} \overset{\oplus}{C} H_{2}$

(II) $C_{6} H_{5} {CH}_{2} \overset{\oplus}{C} H_{2}$

(III) $C_{6} H_{5} \overset{\oplus}{C} {HCH}_{3}$

(IV) $C_{6} H_{5} \overset{\oplus}{C} {({CH}_{3})}_{2}$

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 12 - Electronic Effects & Applications>EXERCISE>Q 26

Among the following the correct order of basicity is:

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 12 - Electronic Effects & Applications>EXERCISE>Q 27

Which of the following carbocations is most stable?

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 12 - Electronic Effects & Applications>EXERCISE>Q 28

Which of the following intermediates have the complete octet around the carbon atom?

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 12 - Electronic Effects & Applications>EXERCISE>Q 29

Which one of the following carbanions is the least stable?

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 12 - Electronic Effects & Applications>EXERCISE>Q 30

Which has the highest

{pK}_{b}

value?

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 12 - Electronic Effects & Applications>EXERCISE>Q 31

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 12 - Electronic Effects & Applications>EXERCISE>Q 32

The correct order of acidity of the three groups (marked $X, Y, Z$ ) in the given species is:

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 12 - Electronic Effects & Applications>EXERCISE>Q 33

Which will be the least stable resonating structure: