Science (English Medium) Class 12 - CBSE Question Bank Solutions for Chemistry

Assertion: HI cannot be prepared by the reaction of KI with concentrated H₂SO₄.

Reason: HI has the lowest H-X bond strength among halogen acids.

A black compound of manganese reacts with a halogen acid to give greenish-yellow gas. When excess of this gas reacts with \[\ce{NH3}\] an unstable trihalide is formed. In this process the oxidation state of nitrogen changes from ______.

Explain why the stability of oxoacids of chlorine increases in the order given below:

\[\ce{HClO < HClO2 < HClO3 < HClO4}\]

Assertion: \[\ce{HI}\] cannot be prepared by the reaction of KI with concentrated \[\ce{H2SO4}\]

Reason: \[\ce{HI}\] has lowest \[\ce{H - X}\] bond strength among halogen acids.

Draw the structures of the following molecules: BrF₃

ICl is more reactive than I₂.

Account for the following: Interhalogens are more reactive than pure halogens.

Draw the structure of BrF₅

Draw the structures of the following : ClF₃

Why is ICl more reactive than I₂?

Draw the structures of the following: BrF₅

Which of the following is not the characteristic of interhalogen compounds?

Match the compounds given in Column I with the hybridisation and shape given in Column II and mark the correct option.

Draw the structure of the following molecule: 

XeF₄

Account for the following:

Helium is used in diving apparatus.

Draw the structures of the following molecules: XeF₂

What happens when: XeF₄ reacts with SbF₅?

Which noble gas has the lowest boiling point?

Which noble gas is used in filling balloons for meteorological observations?

Complete the equation :​ XeF₂+PF₅ →