Match the species in Column I with the type of hybrid orbitals in Column II. Column I Column II (i) SF 4 (a) sp 3 d 2 (ii) IF 5 (b) d 2 sp 3 (iii) NO 2 + (c) sp 3 d (iv) NH 4 + (d) sp 3 (e) sp

(i) SF 4 -----(c) sp 3 d S is surrounded by 4 bond pairs and 1 lone pair ( sp 3 d hybridisation). (ii) IF 5 -----(a) sp 3 d 2 I is surrounded by 5 bond pairs and 1 lone pair ( sp 3 d 2 hybridisation) (iii) NO 2 + -----(e) sp N has 2 bond pairs and no lone pair ( sp hybridisation) (iv) NH 4 + -----(d) sp 3 N has 4 bond pairs and no lone pair ( sp 3 hybridisation). (i) → (c) (ii) → (a) (iii) → (e) (iv) → (d) Column I Column II (i) SF 4 (c) sp 3 d (ii) IF 5 (a) sp 3 d 2 (iii) NO 2 + (e) sp (iv) NH 4 + (d) sp 3

Match the species in Column I with the geometry/shape in Column II. Column I Column II (i) H 3 O + (a) Linear (ii) HC ≡ CH (b) Angular (iii) ClO 2 - (c) Tetrahedral (iv) NH 4 + (d) Trigonal bipyramidal (e) Pyramidal

(i) H 3 O + -----(e)Pyramidal Oxygen has 3 bond pairs and 1 lone pair (pyramidal shape). (ii) HC ≡ CH -----(a)Linear In the formation of ethyne molecule, both the carbon atoms undergo sp -hybridisation having two unhybridised orbital. It forms linear molecules with an angle of 180 ° . (iii) ClO 2 - -----(b)Angular Chlorine has 2 bond pairs and 2 lone pairs (Angular shape). (iv) NH 4 + -----(c)Tetrahedral Nitrogen has 4 bond pairs and no lone pair (Tetrahedral). Column I Column II (i) H 3 O + (e) Pyramidal (ii) HC ≡ CH (a) Linear (iii) ClO 2 - (b) Angular (iv) NH 4 + (c) Tetrahedral

E M B I B E

NCERT Exemplar Chemistry - Class 11>Chapter 4 - Chemical Bonding and Molecular Structure>Short Answer Type>Q 46

HARD

11th CBSE

IMPORTANT

Earn 100

Group the following as linear and non-linear molecules :

$H_{2} O, HOCl, {BeCl}_{2}, {Cl}_{2} O$

Important Questions on Chemical Bonding and Molecular Structure

MEDIUM

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 4 - Chemical Bonding and Molecular Structure>Short Answer Type>Q 47

Elements $X, Y$ and $Z$ have $4, 5$ and $7$ valence electrons respectively.

(i) Write the molecular formula of the compounds formed by these elements individually with hydrogen.

EASY

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 4 - Chemical Bonding and Molecular Structure>Short Answer Type>Q 48

Elements $X, Y$ and $Z$ have $4, 5$ and $7$ valence electrons respectively.

Which of these compounds will have the highest dipole moment?

HARD

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 4 - Chemical Bonding and Molecular Structure>Short Answer Type>Q 48

Draw the resonating structure of

Ozone molecule

HARD

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 4 - Chemical Bonding and Molecular Structure>Short Answer Type>Q 49

Predict the shapes of the following molecules on the basis of hybridisation.

$BC l_{3}, {CH}_{4}, {CO}_{2}, {NH}_{3}$

HARD

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 4 - Chemical Bonding and Molecular Structure>Short Answer Type>Q 50

All the

C — O

bonds in carbonate ion

({CO}_{3}^{2 -})

are equal in length. Explain.

HARD

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 4 - Chemical Bonding and Molecular Structure>Short Answer Type>Q 51

What is meant by the term average bond enthalpy? Why is there a difference in bond enthalpy of

O — H

bond in ethanol

(C_{2} H_{5} OH)

and water?

HARD

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 4 - Chemical Bonding and Molecular Structure>Matching Type>Q 52

Match the species in Column I with the type of hybrid orbitals in Column II.

	Column I		Column II
(i)	${SF}_{4}$	(a)	${sp}^{3} d^{2}$
(ii)	${IF}_{5}$	(b)	$d^{2} {sp}^{3}$
(iii)	${NO}_{2}^{+}$	(c)	${sp}^{3} d$
(iv)	${NH}_{4}^{+}$	(d)	${sp}^{3}$
		(e)	$sp$

HARD

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 4 - Chemical Bonding and Molecular Structure>Matching Type>Q 53

Match the species in Column I with the geometry/shape in Column II.

	Column I		Column II
(i)	$H_{3} O^{+}$	(a)	Linear
(ii)	$HC \equiv CH$	(b)	Angular
(iii)	${ClO}_{2}^{-}$	(c)	Tetrahedral
(iv)	${NH}_{4}^{+}$	(d)	Trigonal bipyramidal
		(e)	Pyramidal