The tendency of BF3, BCl3, and BBr3 to behave as Lewis acid decreases in the sequence

(a) BCl3 > BF3 > BBr3

(b) BBr3 > BCI3 > BF3

(c) BBr3 > BF3 > BCl3

(d) BF3 > BCl3 > BBr3

Concept Questions :-

Covalent Bonding
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The state of hybridisation of C2, C3, C5 and C6 of the hydrocarbon,

is in the following sequence
(a) sp, sp3, sp2 and sp3
(b) sp3, sp2, sp2 and sp
(c) sp, sp2, sp2 and sp3
(d) sp, sp2 sp3 and sp2

Concept Questions :-

Hybridisation
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In which of the following molecules/ions BF3, NO2-, NH2- and H2O, the central atom is sp2 hybridised?
(a) NO2- and NH2-
(b) NH2- and H2O
(c) NO2- and H2O
(d) BF3, and NO2-

Concept Questions :-

Hybridisation
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What is the dominant intermolecular force on bond that must be overcome in converting liquid CH3OH to a gas?

(a) Hydrogen bonding

(b) Dipole-dipole interaction

(c) Covalent bonds

(d) London dispersion force

Concept Questions :-

Hydrogen Bonding
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The angular shape of ozone molecule (O3) consists of

(a) 1 sigma and 2 pi bonds

(b) 2 sigma and 2 pi bonds

(c) 1 sigma and 1 pi bonds

(d) 2 sigma and 1 pi bonds

Concept Questions :-

Types of Bonding
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The correct order of increasing bond angles in the following triatomic species is

(a) NO2- < NO2+ < NO2

(b) NO2- < NO2   < NO2+

(c) NO2< NO2   <NO2-

(d) NO2+ < NO2< NO2

Concept Questions :-

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In the hydrocarbon

     CH3-CH=CH-CH2-CCH

     6      5     4   3      2    1

The state of hybridisation of carbons 1,3 and 5 are in the following sequence

(a) sp2, sp, sp3                       (b) sp, sp3, sp2

(c) sp, sp2, sp3                       (d) sp3, sp2, sp

Concept Questions :-

Hybridisation
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In which of the following molecules are all the bonds not equal ?

(a) ClF3

(b) BF3

(c) AlF3

(d) NF3

Concept Questions :-

Hybridisation
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The correct order of electronegativity of hybrid orbitals of carbon is:

(a) sp>sp2<sp3              (b) sp>sp2>sp3

(c) sp<sp2>sp3              (d) sp<sp2<sp3

Concept Questions :-

Hybridisation
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Which of the following species has a linear shape?

(a) NO2-          (b) SO2            (c) NO2+              (d) O3

Concept Questions :-

Hybridisation
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