Explain why phenol does not undergo substitution of the `-OH` group like alcohol.

Explain the addition and substitution reaction with the help of examples. C_2H_6 undergoes substitution reaction but not addition reaction. Why?

Acetaldehyde does not undergo Cannizzaro reaction. Why ?

Phenol does not react with sodium carbonate. Why?

Explain why Bt cotton flowers undergo pollination by butterflies and bees inspite of being insect pest resistant?

Study the given pedigree chart showing the pattern of blood group inheritance in a family (a) Given the genotype of the following: (i)Parents (ii) The individual 'X' in second generation (b) State the possible blood groups of the individual 'Y' in third generation (c) How does the inheritance of this blood group explain codominance?

Why do HCl, HNO_(3) , etc., show acidic characters in aqueous solutions while solution of compounds like alcohol and glucose do not show acidic character ?