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

What is the difference between multimolecular and macromolecular colloids? Give one example of each. How are associated colloids different from these two types of colloids?

What are micelles? Give an example of a micellers system.

Calculate the overall complex dissociation equilibrium constant for the Cu(NH₃)₄²⁺ ion, given that β₄ for this complex is 2.1 × 10¹³.

What is meant by stability of a coordination compound in solution?

Where does the water present in the egg go after boiling the egg?

What is the effect of denaturation on the structure of proteins?

Write a short note on diazotisation.

Give the IUPAC name of the following compound:

PhCH₂CH₂COOH

Give the IUPAC name of the following compound:

(CH₃)₂C=CHCOOH

Give the IUPAC name of the following compound:

Give the IUPAC name of the following compound:

What type of colloid is formed when a gas is dispersed in a liquid? Give an example

How do you convert toluene to benzoic acid?

Define the following with an example

Denatured protein

Give reasons Dioxygen is a gas while Sulphur is a solid at room temperature.

How do you convert the following :

 Ethyne to Ethanal

How do you convert the following:

Acetic acid to Methane

Write the equations involved in the following reactions :

Stephen reaction

Write the equations involved in the following reactions :

Wolff-Kishner reduction

Calculate the mass of NaCl (molar mass = 58.5 g mol⁻¹) to be dissolved in 37.2 g of water to lower the freezing point by 2°C, assuming that NaCl undergoes complete dissociation. (K_f for water = 1.86 K kg mol⁻¹)