Problem 1
The dye which forms colour on the surface of a fabric by interaction of two compounds is (a) azo dye (b) vat dye (c) mordant dye (d) basic dye
Problem 2
The most useful dye for those fabrics which can form hydrogen bonds is (a) mordant dyes (b) vat dyes (c) acid dyes (d) direct dyes
Problem 3
The dye which is colourless in reduced form but becomes coloured by oxidizing agent is (a) mordant dye (b) vat dye (c) acid dye (d) none
Problem 4
Methyl orange is an example of which type of dye? (a) acid dye (b) mordant dye (c) azo dye (d) both (a) and (b)
Problem 5
A mordant binds the fabric through (a) coordinate bonds (b) covalent bonds (c) ionic bonds (d) H-bonds
Problem 6
Which of the following can disperse benzene in water?
(a)
Problem 7
Which of the following dye has a nitro group? (a) phenolphthalein (b) indigo (c) malachite green (d) martius yellow
Problem 9
Alum is used by dyers of cloth (a) as water purifier (b) as mordant (c) for fire proofing fabrics (d) for softening hard water
Problem 11
Which of the following is a basic dye? (a) alizarin (b) indigo (c) aniline yellow (d) congo red
Problem 12
Methyl orange is an example of which type of dye? (a) acid dye (b) mordant dye (c) azo dye (d) both (a) and (b)
