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

728.

A fruity smell is produced by the reaction of C₂H₅OH with

• CH₃COCH₃

• CH₃COOH

• PCl₅

• CH₃CHO

When dihydroxy acetone reacts with HIO₄, the product is/ are

• HCHO

• HCOOH

• HCHO and HCOOH

• HCHO and CO₂

Which of the following molecules has trigonal planar geometry?

• IF₃

• PCl₃

• NH₃

• BF₃