Which one of the following is a correct set ? from Chemistry Che

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


Advertisement

184.

Which one of the following is a correct set ?

  • H2O, sp3, angular

  • BCl3, sp3, angular

  • NH4+, dsp2, square planar

  • CH4, dsp2, tetrahedral


A.

H2O, sp3, angular

Among the given pair of sets, set or option a is the correct one. They can be elaborated as-
Molecule bp + 1p Hybridisation  Shape
H2O 2 + 2 sp3 angular
BCl3 3 + 0 sp2 trigonal planar
NH4+ 4 + 0  sp3 Tetrahedral
CH4 4 + 0 sp3 Tetrahedral


Advertisement
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


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


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