Acetylene molecule has carbon in: from Chemistry Chemical Bondin

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 Multiple Choice QuestionsMultiple Choice Questions

151.

Paramagnetism of oxygen is explained on the basis of its electronic configuration of

  • (π*2px)1(π2py)1

  • (π*2py)1(π*2pz)1

  • (σ*2s)1(π2py)1

  • (σ*2s)1(π2py)1


152.

Which of the following overlaps leads to bonding?


153.

Which of the following statements is correct ?

  • All carbon to carbon bonds contain a σ-bond and one or more π-bonds

  • All carbon to hydrogen bonds are π-bonds

  • All oxygen to hydrogen bonds are hydrogen bonds

  • All carbon to hydrogen bonds are π-bonds


154.

An example of a polar covalent compound is :

  • KCl

  • NaCl

  • CCl4

  • HCl


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155.

Acetylene molecule has carbon in:

  • sp -hybridization

  • sp2 -hybridization

  • sp3 -hybridization

  • sp3d -hybridization


A.

sp -hybridization

Carbon of CH≡CH or C2H2 has sp- hybridization.


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156.

In which of the following compound sp2 hybridisation is absent ?

  • CH ≡ C - CH = CH2

  • CH ≡ C - CH- CH3

  • CH- CH = CH2

  • CH= CH - CH- CH3


157.

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

  • 4

  • 1

  • 2

  • 3


158.

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


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159.

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


160.

Which one of the following has lowest bond dissociation energy ?

  • Cl - Cl

  • F - F

  • Br - Br

  • I - I


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