Chemical Bonding and Atomic Structure NEET Questions — Free MCQ Practice

Chemical Bonding and Atomic Structure MCQs for NEET — Chemistry Questions with Answers

Practice free Chemical Bonding and Atomic Structure (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.

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Which has highest bond angle ?

NH₃

H₂O

H₂S

PH₃

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Explanation

Fact, 2nd period element having min lone pair ,is having max bond angle

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Which is mismatched regarding the shape ?

XeF₄ = Square planar

XeOF₄ = Square Pyramidal

XeF₆ = Distorted Octahedral

XeO₃ = Bent Shape

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Explanation

XeO₃ = Pyramidal shape

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The isostere pair is

CO₂ and N₂O

CO and N₂

O₂ and NO₂

Both (1) and (2)

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Explanation

Isostere pairs are those in which total number of atom and total number of e^-s are same

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Which of the following exhibits H-bonding?

CH₄

H₂Se

N₂H₄

H₂S

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Explanation

N2H4 (hydrazine) exhibits hydrogen bonding due to the presence of N-H bonds. Hydrogen bonding occurs when a hydrogen atom is covalently bonded to a highly electronegative atom like N, O, or F, allowing it to form a weak attractive interaction with another electronegative atom.

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Amongst $H_{2} O, H_{2} S, H_{2} Se and H_{2} Te$ the one with highest boiling point is:

H₂O because of H-bonding

H₂Te because of higher molecular weight

H₂S because of H-bonding

H₂Se because of lower molecular weight

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Explanation

H₂O has highest boiling point due to H-bonding

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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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