Blog Log in Get Started Free

NEET Practice Questions (MCQs) with Answers & Solutions

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

All Physics Chemistry Botany Zoology

● ● ● ● ●

Acetamide is treated with the following reagents separately. Which one of these would yield methyl amine?

NaOH-Br₂

Sodalime

Hot conc. H₂SO₄

PCl₅

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

Explanation

key idea: the reagent which can convert -CONH2 group into -NH2 group is used for this reaction. among the given reagents only NaOH/Br convert -CONH₂ group into -NH₂ group. Thus, it is used for converting acetamide to methyl amine. This reaction is called Hofmann bromamide reaction.

${CH}_{3} {CONH}_{2} + NaOH = {Br}_{2}^{} \to \underset{methyl amine}{{CH}_{3} {NH}_{2}} + NaBr + {Na}_{2} {CO}_{3} + H_{2} O$

● ● ● ● ●

Consider the following reaction,

$Phenol \overset{Zn dust}{\to} X \to_{Anhydrous {AlCl}_{3}}^{{CH}_{3} Cl} Y \overset{Alkaline {KMnO}_{4}}{\to} Z,$

the product, Z, is

toluene

benzaldehyde

benzoic acid

benzene

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

Explanation

The given reaction sequence involves: 1) Conversion of phenol to benzene using Zn dust (reduction). 2) Friedel-Crafts acylation of benzene with acetyl chloride (CH3COCl) using anhydrous AlCl3 catalyst to give acetophenone. 3) Oxidation of acetophenone with alkaline KMnO4 to give benzoic acid (Z).

● ● ● ● ●

Which one of the following on reduction with lithium aluminium hydride yields a secondary amine?

nitroethane

methylisocyanide

acetamide

methylcyanide

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

Explanation

The reduction of methylisocyanide (CH3NC) with lithium aluminium hydride (LiAlH4) yields methylamine, which is a secondary amine. Nitroethane and acetamide yield primary amines, while methylcyanide forms a primary amine on reduction with LiAlH4.

● ● ● ● ●

Which of the compounds with molecular formula C₅H₁₀ yields acetone on ozonolysis?

2-methyl-2-butene

3-methyl-1-butene

cyclopentene

2-methyl-1-butene

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

● ● ● ● ●

The third name in trinomial nomenclature is

Species

Subgenus

Subspecies

Ecotype

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

Explanation

Trinomial nomenclature

Genus - Species - Subspecies

● ● ● ● ●

The suffix-phyta indicates

Family

Order

Class

Division

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

Explanation

suffix is a term that is kept after the root word of a word, phyta is used as a suffix, it indicates division.

● ● ● ● ●

Two or more species occupying same or overlapping areas are

Sympatric

Sibling

Subspecies

Allopatric

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

Explanation

Two or more species occupying the same or overlapping areas are termed as sympatric. Allopatric species are those that occupy completely separate geographic areas without any overlap.

● ● ● ● ●

An attribute found in plants but not animals is

Metabolism

Sexual reproduction

Autotrophy

Asexual reproduction

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

Explanation

Plants are autotrophs. Animals are not.

Also some simple animals reproduce by asexual reproduction so that option (4) can't be right, because asexual reproduction found in both simple animals & plants . (NCERT, Chapter: "Reproduction In Organisms" , Page No. 5)

● ● ● ● ●

Consider the following two statements:

I. In the single-celled organisms, we are not very clear about the usage of the two terms – growth and reproduction.

II. When it comes to unicellular organisms like bacteria, unicellular algae or amoeba, reproduction is synonymous with growth, i.e., increase in number of cells.

Both I and II are true and II explains I

Both I and II are true but II does not explain I

I is true but II is false

Both I and II are false

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

Explanation

Cell division leads to growth in multicelluular organisms, in unicellular organisms it leads to both (growth & reproduction).

● ● ● ● ●

The most obvious & complicated feature of all living organisms is:

The ability to sense their surroundings or environment and respond to these environmental stimuli.

Reproduction - sexual or asexual - for production of progeny of own kind.

The ability to growth in size due to cell division.

Presence of complex organs systems such as digestive and nervous system.

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

Explanation

The most obvious and complicated feature of all living organisms is their ability to sense their surroundings or environment and respond to these environmental stimuli. This ability to perceive and respond to external stimuli is a fundamental characteristic of life.

Ready to ace NEET?

Free access · No credit card required

Browse All Questions Create Free Account

Frequently Asked Questions

Yes. You can attempt every NEET 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.