alleryStart learning →What is the hybridisation of the positively charged carbon in a carbocation?
- sp
- sp3
- dsp2
- sp2
Show answer and solution
Correct answer: D. sp2
The carbocation carbon is sp2 hybridised with trigonal planar geometry and an empty p orbital.
MHT-CET Basic Principles of Organic Chemistry — practice questions — page 2
Explore 48 free Basic Principles of Organic Chemistry questions in MHT-CET Chemistry. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 31–48 of 48.
What is the hybridisation of the positively charged carbon in a carbocation?Read the answer and worked solution →Which orbital on a carbocation carbon is vacant?Read the answer and worked solution →Which order of carbocation stability is correct?Read the answer and worked solution →Which of these is an electrophile?Read the answer and worked solution →What is the nucleophilic centre of the nucleophile H2O?Read the answer and worked solution →In AlCl3, which atom is the electrophilic centre?Read the answer and worked solution →A bond between carbon and a more electronegative atom like chlorine is what type?Read the answer and worked solution →Polarity induced in adjacent C-C bonds by a polar bond is called which effect?Read the answer and worked solution →Which of these groups shows a -I effect?Read the answer and worked solution →Which halogen has the strongest -I effect?Read the answer and worked solution →Resonance theory applies to a system having which feature?Read the answer and worked solution →A single resonance structure of a molecule is considered to be what?Read the answer and worked solution →Which resonance structure is more stable and important?Read the answer and worked solution →What does the +R effect do to electron density at certain positions?Read the answer and worked solution →The -R effect develops what at certain positions in a molecule?Read the answer and worked solution →Hyperconjugation involves delocalisation of which electrons?Read the answer and worked solution →Hyperconjugation is also called what?Read the answer and worked solution →A larger number of alpha hydrogens gives what effect on stability?Read the answer and worked solution →
Worked practice questions
Which orbital on a carbocation carbon is vacant?
- 2s
- pz
- sp2
- 1s
Show answer and solution
Correct answer: B. pz
The three sp2 orbitals form sigma bonds, leaving the unhybridised pz orbital empty and perpendicular to the plane.
Which order of carbocation stability is correct?
- Primary > secondary > tertiary
- Tertiary > secondary > primary
- Secondary > tertiary > primary
- Tertiary > primary > secondary
Show answer and solution
Correct answer: B. Tertiary > secondary > primary
More alkyl groups stabilise the positive charge, so (CH3)3C+ is more stable than secondary and primary.
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