The chemical added to soaps to impart antiseptic properties is : 

1. Salvarsan

2. Bithional

3. Paracetamol

4. Iodine

Which of the following is used in rocket propellants?

(1) H₂(l)

(2) O₂(l)

(3) N₂H₄(l)

(4) All of these

The poisonous gas evolved in Bhopal tragedy from the pesticide plant of Union Carbide Co. was:

(1) CO                   

(2) methyl isocyanate

(3) phosgene         

(4) chloropicrin

Oil of winter green and salol are the esters of:

1. salicylic acid

2. lactic acid

3. acetic acid

4. sulphanilic acid

Which of the following groups is not an auxochrome ?

(1)-N(CH₃)₂

(2)-OH

(3)-OCH₃

(4) $>\mathrm{C}=\mathrm{N}$