Acetylene molecule has carbon in:

• sp -hybridization

• sp² -hybridization

• sp³ -hybridization

• sp³d -hybridization

In which of the following compound sp² hybridisation is absent ?

• CH ≡ C - CH = CH₂

• CH ≡ C - CH₂ - CH₃

• CH₃ - CH = CH₂

• CH₂ = CH - CH₂ - CH₃

423.

How many electron pairs are present in valence shell of oxygen in water molecule ?

• 4

• 1

• 2

• 3

C - Cl bond is stronger than C - I bond because

• C - Cl bond is more ionic than C - I

• C - Cl bond is more ionic than C - I

• C -Cl bond is more covalent than C - I

• C - Cl bond length is longer than C - I

Bond energy of hydrogen gas is - 433 kJ. How much is the bond dissociation energy of 0.5 mole of hydrogen gas ?

• -433 kJ

• +433 kJ

• -216 kJ

• +216 kJ

Which one of the following has lowest bond dissociation energy ?

• Cl - Cl

• F - F

• Br - Br

• I - I

Geometry of ammonia molecule and the hybridisation of nitrogen involved in it are

• sp³-hybridisation and tetrahedral geometry

• sp³-hybridisation and distorted tetrahedral geometry

• sp²-hybridisation and triangular geometry

• None of the above

Be in BeCl₂ undergoes

• diagonal hybridisation

• trigonal hybridisation

• tetrahedral hybridisation

• no hybridisation

In 1- butene number of σ-bonds is

• 8

• 10

• 11

• 12

The catenation tendency of C, Si and Ge is in the order Ge < Si < C. The bond energies (in kJ mol^-1) of C-C, Si-Si and Ge-Ge bonds, respectively are

• 167, 180, 348

• 180, 167, 348

• 348, 167, 180

• 348, 180, 167