Question

1) What are vitamins ? Name any two diseases caused by deficiency of vitamin $A$. Write the structure of (a) nucleoside (b) nucleotide
2) How are $1$-nitropropane, $2$-nitropropane and $2$-methyl-$2$-nitropropane are distinguished from each other using nitrous acid ?

Answer 1

1) Vitamins are the organic substances that must be supplied to permit proportionate growth in living being or for the maintenance of the structure.
Diseases : 1. Night blindness
2. Retardation of growth
3. Dryness of hair and skin