Organic Compounds Containing Nitrogen — Chemistry STD 12 Science — Question

Explain the following:
Haloalkanes react with KCN to form alkyl cyanides as main product while AgCN forms isocyanides as the major product.

For the reaction R→ P, the concentration of a reactant changes from 0.03 M to 0.02 M in 25 minutes. Calculate the average rate of reaction using units of time both in minutes and seconds.

For a first order reaction, show that time required for 99% completion is twice the time required for the completion of 90% of reaction.

What is meant by crystal field splitting energy? On the basis of crystal field theory, write the electronic configuration of d⁴ in terms of t_2g and e_g in an octahedral field when

1. Δ₀>P
2. Δ₀<P

Arrange water, ethanol and phenol in increasing order of acidity and give reason for your answer.

Explain construction of the galvanic cell according to Daniell cell and explain electrode potential.

Give reasons for the following:

1. The transition metals generally form coloured compounds.
2. E^o value for (Mn³⁺|Mn²⁺) is highly positive than that for (Cr³⁺|Cr²⁺) couple.
3. The chemistry of actinoids elements is not so smooth as that of the lanthanoids.

Explain how does the - OH group attached to a carbon of benzene ring activate it towards electrophilic substitution?

When fruits and vegetables that have dried are placed in water, they slowly swell and return to the original form. Explain why. Would a temperature increase accelerate the process? Explain.