(1) What is the most common method for producing aniline?
a) Nitration of benzene
b) Hydrogenation of nitrobenzene
c) Reduction of nitrobenzene
d) Electrophilic substitution of benzene
(2) Which of the following is not a natural dye?
a) Indigo
b) Tyrian purple
c) Cochineal
d) Methylene blue
(3) Which class of dyes is most commonly used in the textile industry?
a) Azo dyes
b) Acid dyes
c) Basic dyes
d) Direct dyes
(4) Which type of dye is typically used for dyeing wool?
a) Acid dyes
b) Basic dyes
c) Direct dyes
d) Disperse dyes
(5) What is the primary use of crystal violet?
a) Textile dyeing
b) Biological staining
c) Ink manufacturing
d) Photographic processing
(6) What is the main difference between acid dyes and basic dyes?
a) Acid dyes are water-soluble while basic dyes are not.
b) Basic dyes are water-soluble while acid dyes are not.
c) Acid dyes are applied at high temperatures while basic dyes are not.
d) Basic dyes are applied at high temperatures while acid dyes are not.
(7) What is the primary use of safranin?
a) Textile dyeing
b) Biological staining
c) Ink manufacturing
d) Photographic processing
(8) What is the main difference between direct dyes and reactive dyes?
a) Direct dyes are water-soluble while reactive dyes are not.
b) Reactive dyes are water-soluble while direct dyes are not.
c) Direct dyes are applied to fabric without a mordant while reactive dyes require one.
d) Reactive dyes are applied to fabric without a mordant while direct dyes require one.
(9) What is the primary use of malachite green?
a) Textile dyeing
b) Biological staining
c) Ink manufacturing
d) Photographic processing
(10) What is the main difference between natural dyes and synthetic dyes?
a) Natural dyes are derived from plants or animals while synthetic dyes are not.
b) Synthetic dyes are derived from plants or animals while natural dyes are not.
c) Natural dyes are more expensive than synthetic dyes.
d) Synthetic dyes are more expensive than natural dyes.
Answers:
(1) c
(2) d
(3) a
(4) a
(5) b
(6) b
(7) b
(8) c
(9) b
(10) a