Match the physical quantities with their correct SI units. List-I List-II (A) Planck's constant (I) kg m s - 2 (B) Torque (II) kg - 1 m 3 (C) Weight (III) m 2 kg s - 1 (D) Specific volume (IV) kg m 2 s - 2 The correct match is

A = III , B = IV , C = I , D = II

A = II , B = IV , C = I , D = III

A = IV , B = I , C = II , D = III

A = II , B = III , C = I , D = IV

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Important Questions on Chemical Bonding and Molecular Structure

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

After understanding the assertion and reason, choose the correct option.

Assertion: In the bonding molecular orbital (MO) of

H_{2},

electron density is increased between the nuclei.
Reason: The bonding MO is

ψ_{A} + ψ_{B}

, which shows destructive interference of the combining electron waves.

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Decreasing order of stability of $O_{2}, O_{2}^{-}, O_{2}^{+}$ and $O_{2}^{2 -}$ is:

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Match the physical quantities with their correct $SI$ units.

	List-I		List-II
(A)	Planck's constant	(I)	$kg m s^{- 2}$
(B)	Torque	(II)	${kg}^{- 1} m^{3}$
(C)	Weight	(III)	$m^{2} kg s^{- 1}$
(D)	Specific volume	(IV)	$kg m^{2} s^{- 2}$

The correct match is

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

The number and type of bonds in

C_{2}^{2 -}

ion in

{CaC}_{2}

are:

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Which of the following pairs of compounds is isoelectronic and isostructural?

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

The number of sigma

(σ)

and pi

(π)

bonds in pent-

2

-en-

4

-yne is:

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

The units nanometer and picometer are related as,

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Which of the following molecules represents the order of hybridization

{sp}^{2}, {sp}^{2}, sp, sp

from left to right atoms?

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Draw the shape of the following molecule:

${BrF}_{3}$

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Draw the shape of the following molecule:

${XeOF}_{4}$

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Which of the following conversions involves change in both shape and hybridisation?

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

{sp}^{3} d^{2}

hybridization is not displayed by

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

According to molecular orbital theory, which of the following is true with respect to

{Li}_{2}^{+}

and

{Li}_{2}^{-}

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

What will be the bond order of the diatomic species with the elemental electronic configuration :

1 s^{2} 2 s^{2} 2 p^{5}

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Use molecular orbital theory to explain why the

B e_{2}

molecule does not exist.

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Which of the following species has unpaired electrons?

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Which of the following pairs will have same bond order?

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Compare the relative stability of the following species and indicate their magnetic properties:

O_{2}, O_{2}^{+}, O_{2}^{-}

(superoxide),

O_{2}^{2 -}

(peroxide)

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Which of the following molecule is paramagnetic in nature?

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Paramagnetism is shown by the molecules which have

What does IGST stand for in the context of GST?

Important Questions on Chemical Bonding and Molecular Structure

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