Oil of winter green and salol are the esters of:

1. salicylic acid

2. lactic acid

3. acetic acid

4. sulphanilic acid

Which is correct about saccharin?

1. It is 

2. It is 550 times sweeter than sugar

3. It is used as sweetening agent

4. All of the above

Which of the following is an example of basic dye ?
(a) Alizarin
(b) Malachite green
(c) Indigo
(d) Orange I

Which of the following is not a chromophore?

(a) —N=N—

(b) —NO

(c) —NO₂

(d) —NH₂

Which of the following groups is not an auxochrome ?
(a)-N(CH₃)₂
(b)-OH
(c)-OCH₃
(d) $>\mathrm{C}=\mathrm{N}$

The compounds used to fix a dye to fabric is known as:

(a) mordant                     (b) azeotrope

(c) bleaching agents         (d) lake

Which one is disperse dye?
(a) Congo red
(b) Alizarin
(c) Celliton
(d) None of these

Alizarin a mordant dye is not used in:

(a) cotton dyeing

(b) printing

(c) painting

(d) Chromium lakes for wood dyeing 

A certain dye was prepared from a plant grown on a large scale in India. Name the dye:

1. Malachite green

2. Congo red

3. Indigo

4. Turmeric

Which of the following structures represents a colourless substance?

(b) C₆H₅-N=N-C₆H₅

(c) C₆H₅-NH-NH-C₆H₅

(d) None of the above