To which class of dyes does phenolphthalein belong?

(1) Azo dyes 

(2) Nitro dyes 

(3) Triphenyl methane dyes 

(4) Phthalein dyes 

Which of the follwoing is not antibiotic ?

(1) Tetracyclin 

(2) Neomycin 

(3) Carbomycin 

(4) Cyclohexane

Phenacetin is used as:

(1) antipyrtic 

(2) antiseptic 

(3) antimalarial 

(4) analgesic 

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