The angle between two covalent bonds is maximum in from Chemistr

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 Multiple Choice QuestionsMultiple Choice Questions

221.

Inoic bonds are usually formed by combination of elements with

  • high ionisation potential and low electron affinity

  • low ionisation potential and high electron affinity

  • high ionisation potential and high electron affinity

  • low ionisation potential and low electron affinity


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222.

The angle between two covalent bonds is maximum in

  • CH4

  • H2O

  • CO2

  • SO2


C.

CO2

Number of molecular hybrid orbitals = number of sigma bonds + number of lone pair of electrons.
No. of molecular hybrid orbital Hybridization Bond angle
2 sp 180°
3 sp2 120°
4 sp3 190°28'

Dot structure CH4 

            

Number ofmolecular hybrid orbitals = number of sigma bonds + number of lone pairs of electrons = 4+0.

∴ Number of molecular hybrid orbitals = 4
Hence, hybridisation = sp3

Bond angle= 109°28'

Dot structure of H2O

  

∴ Number of molecular hybrid orbitals = 2+ 2 = 4
Hence, hybridisation = sp3

Bond angle = 104. 5°

The lone pairs repel the bond pairs, thereby decreasing the bond angle.

Dot structure of CO2 

O=C=O

∴ Number of molecular hybrid orbitals = 2

Hence, hybridisation = sp

bond angle = 180°

Dot structure of SO2

O←S..=O

∴ Number of molecular hybrid orbitals = 2+1= 3

Hence, hybridisation = sp2

bond angle = 120°

 


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223.

If a molecule MX3 has zero dipole moment, the sigma bonding orbital used by M (At. no. 13) are

  • pure p

  • sp- hybridised

  • sp2- hybridised

  • sp3- hybridised


224.

CO2 in isostructural with

  • SnCl2

  • SO2

  • HgCl2

  • All of these


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225.

The number of sp3-hybridised carbon atoms in cyclohexene are

  • 2

  • 3

  • 4

  • 6


226.

The type of hybridisation present in each carbon of benzene is

  • sp3

  • sp2

  • sp

  • None of these


227.

If the value of bond order is zero, then

  • molecule will be stable

  • molecule will be unstable

  • molecule will be in ionic state

  • None of the above


228.

Bond order of N2 molecule is

  • 3

  • 2

  • 1

  • 0


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229.

Which of the following is a proper match?
r+r- Shape
A. 0.115 - 0.225 i. Triangular
B. 0.225 - 0.414 ii. Tetrahedral
C. 0.414 - 0.732 iii. Cubic
D. 0.732 - 1 iv. Octahedral

  • A - i; B - ii; C - iv; D - iii

  • A - iii; B - ii; C - iv; D - i

  • A - i; B - iii; C - ii; D - iv

  • A - ii; B - iv; C - i; D - iii


230.

According to MOT which of the following is correct for potassium hexa cyano ferrate (III)?

  • It is octahedral complex.

  • t2g orbital contains the e- of metal.

  • For iron, overlapping between empty orbitals and ligand orbitals takes place.

  • All of the above


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