11.

The one electron species having ionisation energy of 54.4 eV is

• He⁺

• H

• Be²⁺

• Be³⁺

Which of the following set of quantum numbers represents the highest energy of an atom?

• n =3, l=2, m=1, s= +1/2

• n=4, l=0, m=0, s= -1/2

• n=3, l=0, m=4, s= +1/2

• n=3, l=1, m=1, s=+1/2

In OF₂, oxygen has hybridisation of

• sp³

• sp²

• sp

• None of these

Amongst NO${}_3^{-}, {\mathrm{AsO}}_3^{3-}, {\mathrm{CO}}_3^{2-}, {\mathrm{ClO}}_3^{-}, {\mathrm{SO}}_3^{2-} \mathrm{and} {\mathrm{BO}}_3^{3-}$, the non -planar species are

• ${\mathrm{NO}}_3^{-}, {\mathrm{CO}}_3^{2-} \mathrm{and} {\mathrm{BO}}_3^{3-}$

• ${\mathrm{ClO}}_3^{-}, {\mathrm{SO}}_3^{2-} \mathrm{and} {\mathrm{BO}}_3^{3-}$

• ${\mathrm{CO}}_3^{2-}, {\mathrm{SO}}_3^{2-} \mathrm{and} {\mathrm{BO}}_3^{3-}$

• ${\mathrm{AsO}}_3^{3-}, {\mathrm{CO}}_3^{2-}\mathrm{and} {\mathrm{SO}}_3^{2-}$

The molecule C₃O₂ linear structure. This compound has

• 2σ and 3π bonds

• 3σ and 4π bonds

• 4σ and 4π bonds

• 3σ and 2π bonds

The structure of XeF₂ and NH₃ respectively are

• linear, see-saw

• bent, see-saw

• bent, tetrahedral

• linear, pyramidal

The IUPAC name of 

   is

• 4-bromo-2-chloro-5-iodo-1-fluorobenzene

• 2-carbamoylhex-3-enal

• 1-bromo-2-chloro-3-fluoro-6-iodobenzene

• 2-bromo-1-chloro-5-fluoro-3-iodobenzene

The above pair is known as

• structural isomers

• geometrical isomers

• erythro steroisomers

• threo stereoisomers

Formula of bleaching powder is

• Ca(OH)₂

• CHCl₃

• CCl₃CHO

• CaOCl₂

Which of the following compounds can exhibit both geometrical isomerism and enantiomerism?

• CH₃CH₂CCH₃=CH—COOH

• CH₃—CHOH—COOH

• CH₃—CH=CH—CH₃

• CH₃CH₂—CHCH₃—HC=CH—CH₃