Which H-bond is stronger-I F - H - FHor II F - H - - - OA- IB- IIC- Both are of same strengthD- Insufficient data

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Byju's Answer

Standard XII

Chemistry

Molecular Orbital Energy Diagrams

Which H-bond ...

Question

Which H-bond is stronger?

(I) F - H - - - - FH or (II) F - H - - - - O

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Both are of same strength

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Insufficient data

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Solution

The correct option is B
II

F is smaller than O and is more electronegative.
Thus, it won't share its electron pair as easily at o. Thus, F - H - - - - O is stronger.

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Similar questions

Q. Which of the following has strongest hydrogen bonds in the following linkages is:
(i)

O - H - - - S

(ii)

S - H - - - O

(iii)

F - H - - - F

(iv)

F - H - - - O

where,

-

represents covalent bond and

- - -

represents hydrogen bond.

Q. Which of the following is correct representation of the reaction when

B F_{3}

reacts with ammonia?

Q. Bond energy of

H - H, F - F

and

H - F

bonds are

104, 38

and

135

kcal mol

^{- 1}

respectively. Resonance energy (in

k c a l m o l^{- 1}

) in the

H - F

molecule is :

Q. Calculate the electronegativity of fluorine from the following data:
Bond energy of H-H bond

E_{H - H} = 104.2 k c a l m o l^{- 1}

Bond energy of F-F bond

E_{F - F} = 36.6 k c a l m o l^{- 1}

Bond energy of H-F bond

E_{H - F} = 134.6 k c a l m o l^{- l}

Electronegativity of Hydrogen

X_{H} = 2.1.

Statements: E * F; G $ H; H # E; G @ K

Conclusions:

I. H@K

II. H*F

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Which H-bond is stronger? (I) F - H - - - - FH or (II) F - H - - - - O

The correct option is B II F is smaller than O and is more electronegative. Thus, it won't share its electron pair as easily at o. Thus, F - H - - - - O is stronger.

Which H-bond is stronger?

(I) F - H - - - - FH or (II) F - H - - - - O

The correct option is B
II

F is smaller than O and is more electronegative.
Thus, it won't share its electron pair as easily at o. Thus, F - H - - - - O is stronger.