Chemical bonding

Question 1

H2O —-> H + OH
OH —–> H + O
Greater bond enthalpy?

Answer 1

H2O ——> H + OH

Question 2

Resonance energy formula(from bond enthalpies)

Answer 2

Resonance energy = deltaHf(observed) - deltaHf(calculated)
(Observed will be given)
Calculated = BDE(reactants) - BDE(products)

Question 3

Conversion of debye to C m

Answer 3

1D = 3.33564 * 10^-30 C m

Question 4

Coloumb to esu

Answer 4

1C = 3* 10^9 esu

Question 5

Debye to esu cm

Answer 5

1D = 10^-18 esu cm

Question 6

percentage covalent character

Answer 6

(dipole moment)obs/ (dipole moment)calc * 100%

Question 7

No of hybridised orbitals of sp2 =?

Answer 7

3

Question 8

Square pyramidal hybridisation is always

Answer 8

sp3d2(not d2sp3)

Question 9

Do molecular orbitals follow hund pauli aufbau

Answer 9

yes

Question 10

Internuclear axis by convention is

Answer 10

z axis

Question 11

sigma and pi, which is symmetric about bond axis

Answer 11

sigma symmetrical, pi not symmetrical

Question 12

For stability bond order must be

Answer 12

+ve (not 0 or -ve)

Question 13

Which is stronger H bond or covalent bond

Answer 13

H bond

Question 14

H bonding max and min in which state

Answer 14

max in solid state

min in gas state

Question 15

Angle in SO3

Answer 15

119.5

Question 16

Angle in ozone

Answer 16

116.78

Question 17

Angle in NH3

Answer 17

107

Question 18

H2O

Answer 18

104.5