The C-O-H bond angle in ethanol is nearly from Chemistry Chemica

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

321.

The helical structure of protein is stabilized by

  • dipeptide bond

  • hydrogen bonds

  • ether bonds

  • peptide bonds


322.

The dipole moment of HBr is 1.6 × 10-30 cm and inter-atomic spacing is 1 Å. The % ionic character of HBr is

  • 7

  • 10

  • 15

  • 27


Advertisement

323.

The C-O-H bond angle in ethanol is nearly

  • 90°

  • 104°

  • 120°

  • 180°


A.

90°

In ethanol the oxygen of -OH group is bonded to the sp3 hybridised carbon by a sigma bond. The -C-O-H bond angle in ethanol is less than the tetrahedral angle (109° 28) due to larger repulsions between the lone pairs of repulsions between the lone pairs of oxygen.  Hence it is 104° in ethanol.


Advertisement
324.

The molecule having zero dipole moment is

  • CH2Cl2

  • BF3

  • NF3

  • ClF3


Advertisement
325.

The bond angle is smallest in

  • H2O

  • H2S

  • BeCl2

  • N2O


326.

Which of the following shell, form an outer octahedral complex?

  • d4

  • d8

  • d6

  • None of these


327.

Valence bond theory of metallic bond was given by

  • Dalton

  • Drudel

  • Fajan

  • Pauling 


328.

The calculated bond order in O2- ions is

  • 1

  • 1.5

  • 2

  • 2.5


Advertisement
329.

Which combination of atoms can form a polar covalent bond ?

  • H and N

  • H and Br

  • N and N

  • Na and Br


330.

The bond length of H2+, H2- and H2 are in the following order

  • H2+ > H2 > H2-

  • H2H2+ > H2-

  • H2- > H2 > H2+

  • H2- > H2+ > H2


Advertisement