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

Action of soap is due to emulsification and micelle formation. Comment.

Give four uses of emulsions.

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

What are the different types of RNA found in the cell?

Write the important functional differences between DNA and RNA.

Mention three areas in which H₂SO₄ plays an important role.

Why is `K_(a_2) "<<" K_(a_1)` for `H_2SO_4` in water?

Describe the manufacture of H₂SO₄ by contact process?

Write balanced equations for NaCl is heated with sulphuric acid in the presence of MnO₂

What is ferromagnetism?

Iron (z=26) is highly ferromagnetic. Explain.

What type of magnetism is shown in the following alignment of magnetic moments?

Account for the following: Fluorine does not exhibit positive oxidation state.

Fluorine is a stronger oxidising agent than chlorine. Why?

What type of magnetism is shown by a substance if magnetic moments of domains are arranged in same direction?

What is the difference between a nucleoside and nucleotide?

Compare the oxidizing action of F₂ and Cl₂ by considering parameters such as bond dissociation enthalpy, electron gain enthalpy and hydration enthalpy.

Account for the following :

Acidic character increases from HF to HI.

F₂ has lower bond dissociation enthalpy than Cl₂. Why?

Define the following term:

Ferromagnetism