A molecule (X) has
(i) four sigma (σ) bonds formed by the overlap of sp2 and s orbitals
(ii) one sigma (σ) bond formed by sp2 and sp2 orbitals and
(iii) one bond formed by px and pz orbitals.
Which of the following is X?
C2H6
C2H3Cl
C2H2Cl2
C2H4
The bond length of HCl molecule is 1.275 Å and its dipole moment is 1.03 D. The ionic character of the molecule (in percent) (charge of the electron = 4.8 × 10-10 esu) is
100
67.3
33.66
16.83
D.
16.83
Given,
Observed dipole moment = 1.03 D
Bond length of HCl molecule, d = 1.275 Å
= 1.275 × 10-8 cm
Charge of electron, e- = 4.8 × 10-10 esu
Percentage ionic character = ?
Theoretical value of dipole moment = e × d
= 4.8 × 10-10 × 1.275 × 10-8 esu - cm
= 6.12 × 10-18 esu - cm
= 6.12 D
Percentage ionic character
=
=
= 16.83%
Which one of the following is a correct set ?
H2O, sp3, angular
BCl3, sp3, angular
NH, dsp2, square planar
CH4, dsp2, tetrahedral
The number of sigma and pi bonds in peroxodisulphuric acid are, respectively
9 and 4
11 and 4
4 and 8
4 and 9
The compound in which the number of d-p bonds are equal to those present in ClO
XeF4
XeO3
XeO4
XeF6
The decreasing order of bond dissociation energies of C-C, C-H and H-H bonds is
H-H > -C-H> -C-C-
-C-C- > C-H> H-H
-C-H >-C-> H-H
C-C- > H-H > -C-H
Given that Hf (H) = 218 kJ/ mol, express the H-H bond energy in kcal/ mol.
52.15
911
104.3
52153