Which of the following is used as an oxidizer in rocket propellants?

(1) Kerosene 

(2) nitric acid 

(3) Liquid oxygen 

(4) Liquid hydrogen 

An example of a liquid propellant is:

1. Nitro cellulose

2. HNO₃ + HCl

3. Hydrazine 

4. None of the above 

A large number of antibiotics have been isolated form 

(1) bacteria actinomycetes 

(2) acids 

(3) alkanols  

(4) bacteria rhizobium 

Hydrazine is a constituent of drugs that are used for the treatment of:

(1) typhoid 

(2) cholera 

(3) malaria 

(4) tuberculosis  

The substances which effect the central nervous system and induce sleep are called;

(1) tranquilizers 

(2) antipyretics 

(3) analgesics 

(4) None of these 

Which one is communicable disease?

(1) Scurvy 

(2) Diabetes 

(3) Beri-beri

(4) Cholera 

An antibiotic contains nitro group attached to aromatic nucleus. it is:

(1) penicillin 

(2) streptomycin 

(3) tetracycline 

(4) chloramphenicol

2-4,-dichloro phenoxyacetic acid is used as a:

(1) fungicide 

(2) insecticide 

(3) herbicide 

(4) moth repellent

Chloroquine is used to prevent or treat malaria caused by mosquito bites. is an example of:

(1) Antipyretic 

(2) Antimalarial 

(3) Antibacterial 

(4) Antitubercular drug 

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