The bond energy is the energy required to : from Chemistry Chemi

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

551.

The geometry of methane molecule is :

  • tetrahedral

  • pyramidal

  • octahedral

  • square planar


552.

Heisenberg's uncertainty principle can be explained as :

  •  p × h4π

  • x x  h4π

  • x x  hπ

  •  πhx


Advertisement

553.

The bond energy is the energy required to :

  • dissociate one mole of the substance

  • dissociate bond in 1 kg of the substance

  • break one mole of similar bonds

  • break bonds in one mole of the substance


C.

break one mole of similar bonds

Bond energy : It may be defined as the energy released when two atoms get bonded or it is equal to the energy required to break the bond to form the neutral atoms .

e.g , H-H (g)  H + H , H = + 103 Kcal/mol


Advertisement
554.

What is binding energy in B511 nucleus , if mass is 0.08181 amu ?

  • 1.2 x 10-4 erg/nucleus

  • 8.2 x 10-4 erg/nucleus

  • 10.2 x 10-4 erg/nucleus

  • 1.9 x 10-4 erg/nucleus


Advertisement
555.

Hydrofluoric acid shows hydrogen bonding due to :

  • high electron affinity of fluorine

  • high bond dissociation energy of fluorine

  • high electronegativity of fluorine

  • none of the above


556.

Assertion: The S-S-S bond angle in S8 molecule is 105°.

Reason : S8 has a V-shape.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false


557.

Assertion : Sodium formate has both the C-O bonds have same value 1.27Å.

Reason : Equal bond length is due to the phenomenon of resonance.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false


558.

Ionic compounds are formed most easily with :

  • low electron affinity , high ionisation energy

  • high electron affinity , low ionisation energy

  • low electron affinity , low ionisation energy

  • high electron affinity , high ionisation energy


Advertisement
559.

The order of bond length is

  • O2 < O3 < O22-

  • O2 < O22- < O3

  • O22- < O3 < O2

  • O2 = O22- > O3


560.

The correct order of dipole moment is

  • CH4 <NF<NH<H2O

  • NF3 <CH4 <NH3 <H2O

  • NH3 <NF3 <CH4 <H2O

  • H2O <NH3 <NF<CH4


Advertisement