Arrange the following in the decreasing order (most important first) of their importance, for the welfare of human society. Give reasons for your answer.
Biogas, Citric acid, Penicillin and Curd

Arrange benzene, n-hexane and ethyne in decreasing order of acidic behaviour. Give reason for this behaviour.

Arrange benzene, n-hexane and ethyne in decreasing order of acidic behaviour. Also give reason for this behaviour.

Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows. Use the Table above to answer the following questions about metals A, B, C and D. (i) Which is the most reactive metal? (ii) What would you observe if B is added to a solution of Copper(II) sulphate? (iii) Arrange the metals A, B, C and D in the order of decreasing reactivity.

In was the most important one type of Halogen compound which is the first prepared by gay -Lussac. Which one Hydrolysis gives different product. The repragentation is underset("Acid+C")underset(darr"Hydrolysis")((CONH_(2))_(2))overset("Hydrolysis")(larr)Aoverset("Hydrolysis")(rarr) HCN+underset(B)underset(darr"Hydrolysis Isomerisation")(HOCN) In above observation, the acid is

In was the most important one type of Halogen compound which is the first prepared by gay -Lussac. Which one Hydrolysis gives different product. The repragentation is underset("Acid+C")underset(darr"Hydrolysis")((CONH_(2))_(2))overset("Hydrolysis")(larr)Aoverset("Hydrolysis")(rarr) HCN+underset(B)underset(darr"Hydrolysis Isomerisation")(HOCN) The Halogen compound A is

In was the most important one type of Halogen compound which is the first prepared by gay -Lussac. Which one Hydrolysis gives different product. The repragentation is underset("Acid+C")underset(darr"Hydrolysis")((CONH_(2))_(2))overset("Hydrolysis")(larr)Aoverset("Hydrolysis")(rarr) HCN+underset(B)underset(darr"Hydrolysis Isomerisation")(HOCN) The final isomerisation product (B) is