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

Malachite green is a direct dye for silk and wool. It is prepared by condensing:

(a) Benzaldehyde and dimethyl aniline

(b) carbonyl chloride and dimethyl aniline

(c) benzene diazonium chloride with dimethyl aniline

(d) none of the above

The propellant in the proposed PSLV rocket of the Indian space programme shall consist of :
(a) a composite solid propellant
(b) liquid propellants such as N₂O₄ + unsymmetrical dimethyl hydrazine (UDMH) and N₂O₄ + monomethyl hydrazine (MMH)
(c) both (a) and (b) in different stages of rocket propulsion
(d) kerosene and liquid oxygen