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

What are the common types of secondary structure of proteins?

What type of bonding helps in stabilising the α-helix structure of proteins?

Differentiate between  the following:

Fibrous proteins and Globular proteins

Predict the product of the following reaction:

Write the equation of the following reaction:

Friedel-Crafts reaction - alkylation of anisole

Write the equation of the following reaction:

Nitration of anisole.

Write the equation of the following reaction:

Bromination of anisole in an ethanoic acid medium.

Write the equation of the following reaction:

Friedel-Craft’s acetylation of anisole.

Why does O₃ act as a powerful oxidising agent?

How is O₃ estimated quantitatively?

Which aerosols deplete ozone?

Determine the osmotic pressure of a solution prepared by dissolving 2.5 × 10⁻² g of K₂SO₄ in 2L of water at 25°C, assuming that it is completely dissociated.

(R = 0.0821 L atm K⁻¹ mol⁻¹, Molar mass of K₂SO₄ = 174 g mol⁻¹)

What happens when the external pressure applied becomes more than the osmotic pressure of solution?

Blood cells are isotonic with 0.9% sodium chloride solution. What happens if we place blood cells in a solution containing

(i) 1.2% sodium chloride solution?

(ii) 0.4% sodium chloride solution?

Out of NH₃ and CO, which ligand forms a more stable complex with a transition metal and why?

The conversion of primary aromatic amines into diazonium salts is known as ___________

Define the following term as related to proteins:

Denaturation

A solution containing 15 g urea (molar mass = 60 g mol^–1) per litre of solution in water has the same osmotic pressure (isotonic) as a solution of glucose (molar mass = 180 g mol^–1) in water. Calculate the mass of glucose present in one litre of its solution.

Write the structure of 2-hydroxybenzoic acid.

Explain the following term with a suitable example:

F-centres