Which of the following is a polar molecule?

(a) BF3

(b) SF4

(c) SiF4

(d) XeF4

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Which one of he following pairs is isostructural (i.e., having the same shape and hybridization)?
(a) [BCl3 and BrCl3]

(b) [NH3 and NO3-]

(c) [NF3 and BF3]

(d) [BF4- and NH4+]

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Types of Bonding
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Bond order of 1.5 is shown by

(a) O2+      (b) O2-        (c) O22-     (d) O2

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Which of the following species contains three bond pairs and one lone pair around the central atom?

(a) H2O                            (b) BF3

(c) NH2-                            (d) PCl3

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The pair of species with the same bond order is:

(a) O22-, B2

(b) O2+, NO-

(c) NO, CO

(d) N2, O2

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Considering the state of hybridisation of carbon atoms, find out the molecule among the following which is linear.

(a) HC≡CH

(b) CH2 = CH—CH2—C = CH

(c) CH3 — CH2 — CH2 — CH3

(d) CH3—CH = CH—CH3

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The correct order of increasing bond length of 

C-H, C-O, C-C and C=C is

(a) C-C<C=C<C-O<C-H

(b) C-O<C-H<C-C<C=C

(c) C-H<C-O<C-C<C=C

(d) C-H<C=C<C-O<C-C

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Covalent Bonding
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Which of the following compounds has the lowest melting point?

(a) CaBr2

(b) CaI2

(c) CaF2

(d) CaCl2

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Lattice/Hydration Energy
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Which of the following has the minimum bond length?

(a) O2-

(b) O22-

(c) O2

(d) O2+

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In which of the following pairs of molecules/ions, the central atoms have sp2 hybridisation?

(a) NO2- and NH3                    (b) BF3 and NO2-(c) NH2- and H2O                     (d) BF3 and NH2-

Concept Questions :-

Hybridisation
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