When `CH_3CHO` is treated with excess of HCHO in aqueous solution of `Na_2 CO_3`, a product, used in making explosive, is obtained finally. Find the number of primary alcoholic groups present in one molecule of the product?

Answer

4

Explanation

`CH_3CHO+underset("Excess")(HCHO) overset(Na_2CO_3)to HO-CH_2-underset(CH_2OH)underset(|)overset(CH_2OH)overset(|)C-CH_2OH+HCOO^(-)`