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

Write one difference in Multimolecular colloid and Associated colloid

Give reasons for the following: N₂O₅ is more acidic than N₂O₃

Complete the following reactions:

Complete the following reactions:

What is the difference between acidic amino acids and basic amino acids?

 How would you account the following :

 Transition metals and their compounds show catalytic properties.

How do you prepare:

K₂MnO₄ from MnO₂?

Write the chemical equations to illustrate the following name reactions:

Aldol condensation

Define the following with a suitable example, of each: 
Multimolecular colloid

 Define the following with a suitable example, of each: 
 Gel

Write the structures of monomers used the following polymers:
Glyptal

 Write the electronic configuration of Fe(III) on the basis of crystal field theory when it forms an octahedral complex in the presence of (i) strong field, and (ii) weak field ligand. (Atomic no.of Fe=26) 

Differentiable between the following: 
Essential amino acids Non-essential amino acids 

Write the product formed when p-nitro chlorobenzene is heated with aqueous  NaOH at 443K followed by acidification? 

complete the following reaction: 

complete the following reaction: 

\[\begin{array}{cc}
\phantom{...}\ce{CH3} \\
| \\
\phantom{.................}\ce{CH3-CH-COOH ->[(i) Br2/Red P4][(ii)H2O]}
\end{array}\]

Complete the following reaction:

The reaction \[\ce{RX + 2Na + RX -> R - R + 2NaX}\] is called ____________.

Which one of the statements given below concerning properties of solutions, describes a colligative effect?

12 g of urea is dissolved in 1 litre of water and 68.4 g of sucrose is dissolved in 1 litre of water. The lowering of vapour pressure of first case is ____________.