Chemistry NEET Questions — Free MCQ Practice

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Chemistry MCQs for NEET — Practice Questions with Answers

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Which of the following are isoelectronic and isostructural?

${NO}_{3}^{-}, {CO}_{3}^{- 2}, {ClO}_{3}^{-}, {SO}_{3}$

${NO}_{3}^{-}, {CO}_{3}^{- 2}$

${SO}_{3}, {NO}_{3}^{-}$

${ClO}_{3}^{-}, {CO}_{3}^{- 2}$

${CO}_{3}^{- 2}, {ClO}_{3}^{-}$

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Which of the following has largest bond angle.

H₂O

F₂O

Cl₂O

H₂S

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Explanation

Cl₂0 = 110.9

F₂O = 102

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In the molecular orbital diagram for $O_{2}^{+}$ ion. the HOMO is :-

$σ$ MO orbital

π MO orbital

π^* MO orbital

$\overset{*}{σ}$ MO orbital

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Explanation

last electron enter in anti bonding M.O

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Which of the following have a three dimensional network structure?

SiO₂

(BN)_y

P₄(white)

1 and 2 both

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Explanation

Both SiO2 (quartz) and (BN)y (boron nitride) have a three-dimensional network structure. In SiO2, each silicon atom is tetrahedrally bonded to four oxygen atoms, forming a continuous network. Similarly, in (BN)y, boron and nitrogen atoms are covalently bonded in a hexagonal network.

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The correct order of strength of H-bond in the following compound :-

H₂O > H₂O₂ > HF > H₂S

HF > H₂O₂ > H₂O > H₂S

HF > H₂O > H₂S > H₂O₂

HF > H₂O > H₂O₂ > H₂S

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Explanation

The boiling point of water is $100^{\circ} C$ while that of hydrogen peroxide is about $150^{\circ} C$ . Here is a list of factors that might contribute to this difference (adapted from source)

Stronger dispersion forces in $H_{2} O_{2}$ (larger molar mass)
Higher dipole moment in $H_{2} O_{2}$
More hydrogen bond acceptors in $H_{2} O_{2}$

As for the number of hydrogen bonds, if we look at the structure of ice, each hydrogen atom of water is involved in a hydrogen bond (each oxygen is involved in two). But peroxide has a larger number of hydrogen bonds.

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Which of the following pair of species have identical shapes ?

NO₂⁺ and NO₂^-

PCl₅ and BeF₅

XeF₄ and ICI₄^-

TeCl₄ and XeO₄

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Which of the following is correct :-

Extent of hydration is PCl₅ > SiCl₄ and BCl₃ < CCl₄

K⁺ ion will be more Hydrated than Li⁺

In BCl₃ there are no vacant d-orbitals but still it can undergo expansion

None

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Explanation

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Carbon atom in C₂(CN)₄ are

sp hybridised

sp² hybridised

sp and sp² hybridised

sp, sp² and sp³ hybridised

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Explanation

CN is having sp and C=C has sp2

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The correct order in which the O-O bond length increases in the following is

H₂O₂ < O₂ < O₃

O₃ < H₂O < O₂

O₂ < O₃< H₂O₂

O₂ < H₂O₂ < O₃

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Explanation

In H₂O₂, O-O bond is present. In O₂ O=O bond is present and in O₃, resonance is present so, bond length is in between single and double bond.

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Carbon suboxide (C₃O₂) has

Linear structure

Bent structure

Trigonal structure

Disorted tetrahedral structure

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Explanation

The structure of C₃O₂ is O=C=C=C=O

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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.