Which of the following hydrogen halides is most  basic?

• HF

• HCl

• HBr

• HI

1282.

Sulphuryl chloride (SO₂Cl₂) reacts with white phosphorus (P₄) to give

• PCl₅, SO₂

• OPCl₃, SOCl₂

• PCl₅, SO₂, S₂Cl₂

• OPCl₃, SO₂, S₂Cl₂

Which of the following order of basic strength is correct?

• NH₃ < NH₂OH < HN₃ < NH₂-NH₂

• NH₂OH <HN₃ <NH₂-NH₂ <NH₃

• HN₃ <NH₃ <NH₂OH <NH₂-NH₂

• HN₃ <NH₂OH <NH₂-NH₂<NH₃

Which one forms KHX₂ type compound?

• HF

• HCl

• HI

• HBr

Which of the following is stable (inert) to fire?

• CCl₄

• C₂H₅OH

• CH₄

• C₄H₁₀

Ionisation potential values of noble gases decrease down the group with increase in atomic size. Xenon forms binary fluorides by the direct reaction of elements. Identify the correct statement(s) from below.

• Only the heavier noble gases form such compounds

• It happens because the noble gases have higher ionisation energies

• It happens because the compounds are formed with electronegative ligands

• Octet of electrons provide the stable arrangements

Assertion: In some cases oxygen shows positive oxidation number though it is an electronegative element.

Reason : Fluorine is more electronegative than oxygen.

• If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

• If both Assertion and Reason are true but Reason is not the correct explanation of Assertion 

• If Assertion is true but Reason is false.

• If Assertion is false but Reason is true.

Assertion: All halogens are coloured.
Reason: The halogens absorb visible light.

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

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

• If the assertion is true but the reason is false.

• If both the assertion and reason are false.

Assertion: F-F bond has low bond dissociation energy.
Reason: The fluorine has lower reactivity.

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

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

• If the assertion is true but the reason is false.

• If both the assertion and reason are false.

Assertion: Dinegative anion of oxygen (O^2-) is quite common but negative anion of sulphur (S^2-) is less common.
Reason: Covalency of oxygen is two.

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

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

• If the assertion is true but the reason is false.

• If both the assertion and reason are false.