The narrow-spectrum antibiotic among the following is:

1. Chloramphenicol

2. Penicillin G

3. Ampicillin

4. Amoxicillin

The molecule among the following that is an antidepressant is:

1. Chloroxylenol

2. Bithional

3. Cocaine

4. Penicillin-G

Cetyltrimethyl ammonium bromide is an example of :

1. Artificial sweetener
2. Cationic detergent
3. Soap
4. Anionic detergent

The molecule among the following that acts as an antiseptic is -

1. Iodine + C₂H₅OH 

2. Boric acid

3. H₂O₂ 

4. All of the above

Sulpha drugs are used for:

1. Removing bacteria.

2. Precipitating bacteria.

3. Stopping the growth of bacteria. 

4. Decreasing the size of bacteria.

A space rocket is propelled by:
1. An automobilic engine 
2. Nuclear Engine 
3. Steam Engine 
4. Mixture of fuel and oxidiser called propellant 

An example of a liquid propellant is:

1. Nitro cellulose

2. HNO₃ + HCl

3. Hydrazine 

4. None of the above 

Bithional is an example of:
1. Disinfectant 
2. Antiseptic
3. Antibiotic 
4. Analgesic 

A vat dye, often used in dyeing jeans is -

1. Indigo 

2. Alizarin 

3. Picric acid 

4. Crystal violet