Assertion : NF₃ is a weaker ligand than N(CH₃)₃ .

Reason : NF₃ ionizes to give F^- ions in aqueous solution.

• If both assertion and reason are true and the reason is the correct explanation of the assertion.

• If both assertion and reason are true and the reason is not the correct explanation of the assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

862.

Hybridisation in ${\mathrm{CH}}_3,\stackrel{+}{ \mathrm{C}}{\mathrm{H}}_3 \mathrm{and} \stackrel{-}{\mathrm{C}}{\mathrm{H}}_3$ are respectively

• sp², sp², sp³

• sp², sp³, sp³

• sp³, sp³, sp²

• sp³, sp², sp³

Assertion : The O - O bond length in H₂O₂ is shorter than that of O₂F₂.

Reason : H₂O₂ is an ionic compound.

• If both assertion and reason are true and the reason is the correct explanation of the assertion.

• If both assertion and reason are true and the reason is not the correct explanation of the assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

In which of the following $\mathrm{p\pi }-\mathrm{d\pi }$ bonding is possible?

• ${\mathrm{CO}}_3^{2-}$

• ${\mathrm{PO}}_4^{3-}$

• ${\mathrm{NO}}_3^{-}$

• ${\mathrm{NO}}_2^{-}$

Smallest intermolecular distance is found in

• O₂

• O₂⁺

• O₂^-

• O₂^2-

The number of lone pairs of electrons on the central atoms of H₂O, SnCl₂, PCl₃ an XeF₂ respectively are

• 2, 1, 1, 3

• 2, 2, 1, 3

• 3, 1, 1, 2

• 2, 1, 2, 3

dsp² hybridisation is found in

• [Ni(CN)₄]^2-

• [CoCl₄]^2-

• [CuCl₄]^3-

• [CuCl₄]^2-

Cold ferrous sulphate solution on absorption of NO develops brown colour due to the formation of

• paramagnetic [Fe(H₂O)₅(NO)] SO₄

• diamagnetic [Fe(H₂O)₅(N₃)] SO₄

• paramagnetic [Fe(H₂O)₅(NO₃)][SO₄]₂

• diamagnetic [Fe(H₂O)₄ (SO₄)]NO₃

Which of the following option w.r.t. increasing bond order is correct ?

• NO < C₂ <O₂^- <He₂⁺

• C₂ < NO < He₂⁺ < O₂^-

• He₂⁺ < O₂^- < NO  < C₂

• He₂⁺ < O₂^- < C₂ < NO.

The BCl₃, is a planar molecule where as NCl₃, is pyramidal. because

• B-Cl bond is more polar than N-Cl bond

• N-Cl bond is more covalent than B-Cl bond

• nitrogen atom is smaller than boron atoms

• BCl₃  has no lone pair but NCl₃ has a lone pair of electrons.