PUC Science 2nd PUC Class 12 - Karnataka Board PUC Question Bank Solutions for Chemistry

Write two uses of ClO₂.

Why are halogens coloured?

Write the reactions of F₂ with water.

With what neutral molecule is ClO⁻ isoelectronic? Is that molecule a Lewis base?

Arrange the following in the order of property indicated for the given set:

HF, HCl, HBr, HI - increasing acid strength.

What are three types of RNA molecules which perform different functions?

What type of linkage is present in nucleic acids?

Predict the products of the following reactions :

Define the following term: 

Nucleotide

In terms of band theory, what is the difference between a conductor and an insulator?

In terms of band theory, what is the difference between a conductor and a semiconductor?

What are nucleic acids?

How will you bring about the following conversion in not more than two steps?

Benzoic acid to Benzaldehyde

Describe the following:

Decarboxylation

Sea is the greatest source of some halogens. Comment.

Write the important structural differences between DNA and RNA.

Mention two important functions of nucleic acids.

What happens when 

(i) PCl₅ is heated ? Write the reactions involved.

Account for the following : Cl – CH₂COOH is a stronger acid than CH₃COOH.

What products would be formed when a nucleotide from DNA containing thymine is hydrolysed?