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NEET Practice Questions (MCQs) with Answers & Solutions

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Incorrect statement regarding ${BF}_{2} {NH}_{2}$ molecule is :

FBF bond angle $< 120 %$

HNH bond angle $> 109 ° 28'$

Exhibits intermolecular H-bond

Hybridization of N-atom is ${sp}^{3}$

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The bond having minimum bond energy is :

$C — C$

$O — O$

$S — S$

$P — P$

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Explanation

(b) Due to inter electronic repulation between lone pairs on both oxygen atoms bond energy of $O — O$

bond is less.

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Which gas should not be collected over water because of its high solubility in water?

$H_{2}$

$N_{2}$

$C H_{4}$

HCl

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Explanation

(d) HCL is highly in water because it ionise in water and form ion-dipole interaction with water

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The correct increasing order of extent of hydrolysis is :

${CCl}_{4} < {MgCl}_{2} < {AlCl}_{3} < {SiCl}_{4} < {PCl}_{5}$

${CCl}_{4} < {AlCl}_{3} < {MgCl}_{2} < {PCl}_{5} < {SiCl}_{4}$

${CCl}_{4} < {SiCl}_{4} < {PCl}_{5} < {AlCl}_{3} < {mgCl}_{2}$

${CCl}_{4} < {PCl}_{5} < {SiCl}_{4} < {AlCl}_{3} < {MgCl}_{2}$

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Explanation

(a) Aqueous hydrolysis of ${CCl}_{4}$ is not possible due to absence of vacant ortibal on carbon, while

hybrolysis of ${MgCl}_{2} < {AlCl}_{3} < {SiCl}_{4} < {PCl}_{5}$ is possible. Extent of hydrolysis is proportional to the

amount of positive formation charge present on the atomic site prone to attack of $H_{2} O$

molecules. ${CCl}_{4} < {MgCl}_{2} < {AlCl}_{3} < {SiCl}_{4} < {PCl}_{5}$

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Low melting point is expected for soild:

Ionic soild

metallic solid

molecular soild

covalent soild

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Explanation

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Inorganic benzene reacts with HCl to form a compound $B_{3} N_{3} H_{9} {Cl}_{3}$ . The protonation occurs at:

B-atom

N-atom

First at B-atom then rearrangers into N-atom

First N-atom then rearrangers into B-atom

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Given the correct order of initials T or F for the following statements. Use T if staement is true and F if it is false:

(i) $({CH}_{3})_{2} P ({CF}_{3})_{3}$ is non-polar $({CH}_{3})_{3} P ({CF}_{3})_{2}$ is polar molecule

(ii) ${CH}_{3} \hat{P} {CH}_{3}$ bond angles are equal in $({CH}_{3})_{3} P ({CF}_{3})_{2}$ molecule

(iii) ${PF}_{3}$ will be more soluble in polar solvent than ${SiF}_{4}$

TTF

FFT

FFF

FTT

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Which substance has the strongest London dispersion forces?

$S i H_{4}$

$C H_{4}$

$S n H_{4}$

$G e H_{4}$

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Explanation

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Which of the following compounds has the lowest boiling point?

HCl

HBr

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Explanation

(b) HCl has least boiling point among all halogen acids because it contains V.W. force never contains H-bond HCl < HBr < HI < HF .

Only HF has hydrogen bonding rest all have V.W. force of attraction.

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Select correct statement about hydrolysis of ${BCl}_{3}$ and ${NCl}_{3}$ :

${NCl}_{3}$ is hydrolysed and gives $HOCl$ but ${BCl}_{3}$ is not hydrolysed

Both ${NCl}_{3}$ and ${BCl}_{3}$ on hydrolysis gives $HCl$

${NCl}_{3}$ on hydrolisis gives $HOCl$ but ${BCl}_{3}$ gives $HCl$

Both ${NCl}_{3}$ and ${BCl}_{3}$ on hydrolysis gives $HOCl$

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Explanation

NCl3 is a covalent compound and undergoes hydrolysis to form HOCl (hypochlorous acid). However, BCl3 is a Lewis acid and undergoes hydrolysis to form HCl (hydrochloric acid). The difference in behavior arises from the difference in their electronic configurations and bonding.

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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.