The number of sp3-hybridised carbon atoms in cyclohexene are fro

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491.

The number of sp3-hybridised carbon atoms in cyclohexene are

  • 2

  • 3

  • 4

  • 6


C.

4

Number of molecular hybrid orbital = number of σ bons + number of lone pair of electrons.
Number of molecular hybrid orbitals Hybridisation
2 sp
3 sp2
4 sp3

C-1 and C-2 carbon have three molecular hybrid orbitals. Hence, the hybridisation of C-1 and C-2 are sp2

C-3, C-4, C-5 and C-6 have four molecular hybrid orbitals. Hence the hybridisation of C-3, C-4, C-5 and C-6 are sp3.


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492.

The type of hybridisation present in each carbon of benzene is

  • sp3

  • sp2

  • sp

  • None of these


493.

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


494.

Bond order of N2 molecule is

  • 3

  • 2

  • 1

  • 0


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495.

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


496.

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


497.

Which of the following is an electron deficient compound?

  • B2H6

  • NH3

  • C2H6

  • CCl4


498.

Which of the following has zero dipole moment?

  • ClF

  • PCl3

  • SiF4

  • CFCl3


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499.

The shape of water molecule according to VSEPR theory, is

  • octahedral

  • distorted tetrahedral

  • trigonal planar

  • trigonal bipyramidal


500.

Which of the following species is paramagnetic?

  • CN-

  • NO

  • O22-

  • CO


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