The correct order towards bond angle is

• sp³ < sp² < sp

• sp < sp² < sp³

• sp < sp³ < sp²

• sp² < sp³ < sp

72.

Which of the following has a bond formed by overlap of sp-sp³ hybrid orbitals?

• CH₃ - C $\equiv$ C - H

• CH₃ - CH = CH - CH₃

• CH₂ = CH - CH = CH₂

• HC $\equiv$CH

Which of the following has the highest bond order?

• N₂

• O₂

• He₂

• H₂

The bond length of HCl bond is 2.29 x 10^-10 m. The percentage ionic character of HCl, if measured dipole moment is 6.226 x 10^-30 C- m, is

• 8%

• 20%

• 17%

• 50%

What is the wavelength (in m) of a particle of mass 6.62 x 10^-29 g moving with a velocity of 10³ ms^-1?

• 6.62 x 10^-4

• 6.62 x 10^-3

• 10^-5

• 10⁵

H-O-H bond angle in H₂O is 104.5° and not 109° 28' because of

• lone pair-lone pair repulsion

• lone pair-bond pair repulsion

• bond pair-bond pair repulsion

• high electronegativity of oxygen

The total number of orbitals in the fifth energy level is

• 5

• 10

• 18

• 25

The atomic number of an element 'M' is 26. How many electrons are present in the M-shell of the element in its M³⁺ state ?

• 11

• 15

• 14

• 13

In which of the following pairs, both molecules possess dipole moment ?

• CO₂, SO₂

• BCl₃, PCl₃

• H₂O, SO₂

• CO₂, CS₂

The hybridisation state of carbon in fullerene is

• sp

• sp²

• sp³

• sp³d