The decreasing order of bond dissociation energies of C-C, C-H an

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

181.

Which of the following is a linear molecule?

  • BeCl2

  • H2O

  • SO2

  • CH4


182.

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 sporbitals and 

(iii) one π bond formed by px and pz orbitals.

Which of the following is X?

  • C2H6

  • C2H3Cl

  • C2H2Cl2

  • C2H4


183.

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


184.

Which one of the following is a correct set ?

  • H2O, sp3, angular

  • BCl3, sp3, angular

  • NH4+, dsp2, square planar

  • CH4, dsp2, tetrahedral


Advertisement
185.

The number of sigma and pi bonds in peroxodisulphuric acid are, respectively

  • 9 and 4

  • 11 and 4

  • 4 and 8

  • 4 and 9


186.

The compound in which the number of dπ-pπ bonds are equal to those present in ClO4-

  • XeF4

  • XeO3

  • XeO4

  • XeF6


Advertisement

187.

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


A.

H-H > -C-H> -C-C-

The decreasing order of bond dissociation energies of C-C, C-H and H-H bonds is as : H-H > -C-H> -C-C-


Advertisement
188.

Hybridisation of oxygen in diethyl ether is

  • sp

  • sp2

  • sp3

  • sp3d


Advertisement
189.

Which of the following is not tetrahedral ?

  • BF4-

  • NH4+

  • CO32-

  • SO42-


190.

Given that Hf (H) = 218 kJ/ mol, express the H-H bond energy in kcal/ mol.

  • 52.15

  • 911

  • 104.3

  • 52153


Advertisement