Which of the following is an alkaloid?

1. Nicotine 

2. Piperine 

3. Codeine 

4. All of these 

Which of the follwoing is not antibiotic ?

(1) Tetracyclin 

(2) Neomycin 

(3) Carbomycin 

(4) Cyclohexane

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  

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

The insecticide containing 99% -isomer of benzene hexachloride is known as:

(1) lindane 

(2) TNT 

(3) malathion 

(4) methoxychlor 

Sulphaguanidine is used for:

(1) dysentery 

(2) urinary infections 

(3) antiseptic 

(4) antipyretic  

The rose odour from an ester is formed by the action of HCOOH on:

(1) pine oil 

(2) olive oil 

(3) geraniol 

(4) turpentine oil 

Which of the following is a natural dye?

(1) Martius yellow 

(2) Alizarin 

(3) Phenolphthalein 

(4) Oragne l