Chemistry MCQs for NEET — Practice Questions with Answers

Practice free Chemistry NEET multiple-choice questions online with instant answers and detailed explanations. No login required.

All Physics Chemistry Botany Zoology
Register free to filter questions

Many organic compounds are prepared by using PCl5 because:

You've reached today's free limit of 20 questions. Log in to keep practising for free.
Explanation

Substitution of -OH group from a substrate can be easily made by PCl5

Common oxidizing agents used in organic chemistry are;

You've reached today's free limit of 20 questions. Log in to keep practising for free.
Explanation

(d) All these are oxidizing reagents

In E2 elimination, some compounds follow Hofmann's rule which means:

You've reached today's free limit of 20 questions. Log in to keep practising for free.
Explanation

(d) Follow elimination rules.

The hydrolysis of alkyl halides by aqueous NaOH is best termed as:

You've reached today's free limit of 20 questions. Log in to keep practising for free.
Explanation

(d) R-XNaOHR-OH+NaXR-XOH-R-OH+X-this is a nucleophilic substitution reaction

SN1 reaction on optically active substrates mainly gives:

You've reached today's free limit of 20 questions. Log in to keep practising for free.
Explanation

(c) SN1 mechanism gives rise to 50% inversion as it involves front seat as well as back seat substitution. this leads to racemic products

"The negative part of the addendum adds on the carbon atom joined to the least number of hydrogen atoms." This statement is called as:

You've reached today's free limit of 20 questions. Log in to keep practising for free.
Explanation

(a) it is Markownikoff's rule

Hydrolysis of propane gives:

You've reached today's free limit of 20 questions. Log in to keep practising for free.
Explanation

(c) CH3CH2CH3HeterolysisC-H3+CH3C+H2,CH3C+H2  is more stable than CH3-C-H2 due to dispersal of +ve charge on ethylium ion on account of +ve inductive effect.Thus, propane will not give C+H3 and CH3C-H2

Amongst the following which of the above are true for SN2 reaction?

(i) The rate of reaction is independent of the concentration of the nucleophile

(ii) the nucleophile attacks the carbon atom on the side of the molecule opposite to the group being displaced.

(iii) The reaction proceeds with simultaneous bond formation and bond rupture.

You've reached today's free limit of 20 questions. Log in to keep practising for free.
Explanation

(d) Follow characteristics of SN2 mechanism

Carbanions initiate:

You've reached today's free limit of 20 questions. Log in to keep practising for free.
Explanation

Carbanions are nucleophilic species that can initiate both addition and substitution reactions. They can attack electrophilic centers in molecules, leading to addition reactions, or displace leaving groups, resulting in substitution reactions.

Ease of abstraction of hydrogen is greater when attached to:

You've reached today's free limit of 20 questions. Log in to keep practising for free.
Explanation

(c)The reactivity order for H atom is 3°>2°>1°;Neocarbon doesnot have H atom.

Ready to ace NEET?

Free access · No credit card required

Frequently Asked Questions

Yes. You can attempt every Chemistry question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.

No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.

The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.