Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Chemistry

Write the main product in the following reaction:

DNA fingerprinting is used to determine paternity of an individual. Which property of DNA helps in the procedure?

Account for the following:

Fluorine forms only one oxoacid HOF.

Draw the structures of the following:
(1) HClO₄
(2) H₃PO₃

When RNA is hydrolysed, there is no relationship among the quantities of different bases obtained. What does this fact suggest about the structure of RNA?

Draw the structures of the HClO₃.

Account for the following :

HClO₄ is a stronger acid than HClO.

The increasing order of reducing power of the halogen acids is:

Which of the following statements is true for protein synthesis?

Which one of the following order is correct for the bond dissociation enthalpy of halogen molecule?

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?