(b)A mordant is any substance which can be fixed to the fibre and which can be dyed later on mostly hydroxide or basic salts of chromium aluminium and iron are used as mordant. A dye which imparts different colours in the presence of different mordant is referred to as a mordant dye. For ex. alizarin is a mordant dye when mordanted with aluminium salt solution. It imparts rose red colour to fabric but the same fabric is dyed blue when it is mordanted with barium salt and it dyes violet is mordant with Ferric salt.
CHEMISTRY IN EVERYDAY LIFE
38430
An insoluble coloured compound formed by action of metallic salts on dyes is known as
1 Lake
2 Mordant
3 Dye intermediate
4 None of these
Explanation:
(a)The process is called lake.
CHEMISTRY IN EVERYDAY LIFE
38431
Alizarin dye obtained from the root of madder plant is anthraquinone derivative. Its structure corresponds to
1 \(1, 2-\)dihydroxy anthraquinone
2 \(2, 3-\)dihydroxy anthraquinone
3 \(1, 4-\)dihydroxy anthraquinone
4 \(1-\)hydroxy anthraquinone
Explanation:
(a) Alizarin is \(1,2 \) dihydroxy anthraquinone i.e.,
CHEMISTRY IN EVERYDAY LIFE
38432
To which class of dyes does phenolphthalein belong
(b)A mordant is any substance which can be fixed to the fibre and which can be dyed later on mostly hydroxide or basic salts of chromium aluminium and iron are used as mordant. A dye which imparts different colours in the presence of different mordant is referred to as a mordant dye. For ex. alizarin is a mordant dye when mordanted with aluminium salt solution. It imparts rose red colour to fabric but the same fabric is dyed blue when it is mordanted with barium salt and it dyes violet is mordant with Ferric salt.
CHEMISTRY IN EVERYDAY LIFE
38430
An insoluble coloured compound formed by action of metallic salts on dyes is known as
1 Lake
2 Mordant
3 Dye intermediate
4 None of these
Explanation:
(a)The process is called lake.
CHEMISTRY IN EVERYDAY LIFE
38431
Alizarin dye obtained from the root of madder plant is anthraquinone derivative. Its structure corresponds to
1 \(1, 2-\)dihydroxy anthraquinone
2 \(2, 3-\)dihydroxy anthraquinone
3 \(1, 4-\)dihydroxy anthraquinone
4 \(1-\)hydroxy anthraquinone
Explanation:
(a) Alizarin is \(1,2 \) dihydroxy anthraquinone i.e.,
CHEMISTRY IN EVERYDAY LIFE
38432
To which class of dyes does phenolphthalein belong
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CHEMISTRY IN EVERYDAY LIFE
38429
Alizarin belongs to the class of
1 Vat dyes
2 Mordant dyes
3 Substantive dyes
4 Reactive dyes
Explanation:
(b)A mordant is any substance which can be fixed to the fibre and which can be dyed later on mostly hydroxide or basic salts of chromium aluminium and iron are used as mordant. A dye which imparts different colours in the presence of different mordant is referred to as a mordant dye. For ex. alizarin is a mordant dye when mordanted with aluminium salt solution. It imparts rose red colour to fabric but the same fabric is dyed blue when it is mordanted with barium salt and it dyes violet is mordant with Ferric salt.
CHEMISTRY IN EVERYDAY LIFE
38430
An insoluble coloured compound formed by action of metallic salts on dyes is known as
1 Lake
2 Mordant
3 Dye intermediate
4 None of these
Explanation:
(a)The process is called lake.
CHEMISTRY IN EVERYDAY LIFE
38431
Alizarin dye obtained from the root of madder plant is anthraquinone derivative. Its structure corresponds to
1 \(1, 2-\)dihydroxy anthraquinone
2 \(2, 3-\)dihydroxy anthraquinone
3 \(1, 4-\)dihydroxy anthraquinone
4 \(1-\)hydroxy anthraquinone
Explanation:
(a) Alizarin is \(1,2 \) dihydroxy anthraquinone i.e.,
CHEMISTRY IN EVERYDAY LIFE
38432
To which class of dyes does phenolphthalein belong
(b)A mordant is any substance which can be fixed to the fibre and which can be dyed later on mostly hydroxide or basic salts of chromium aluminium and iron are used as mordant. A dye which imparts different colours in the presence of different mordant is referred to as a mordant dye. For ex. alizarin is a mordant dye when mordanted with aluminium salt solution. It imparts rose red colour to fabric but the same fabric is dyed blue when it is mordanted with barium salt and it dyes violet is mordant with Ferric salt.
CHEMISTRY IN EVERYDAY LIFE
38430
An insoluble coloured compound formed by action of metallic salts on dyes is known as
1 Lake
2 Mordant
3 Dye intermediate
4 None of these
Explanation:
(a)The process is called lake.
CHEMISTRY IN EVERYDAY LIFE
38431
Alizarin dye obtained from the root of madder plant is anthraquinone derivative. Its structure corresponds to
1 \(1, 2-\)dihydroxy anthraquinone
2 \(2, 3-\)dihydroxy anthraquinone
3 \(1, 4-\)dihydroxy anthraquinone
4 \(1-\)hydroxy anthraquinone
Explanation:
(a) Alizarin is \(1,2 \) dihydroxy anthraquinone i.e.,
CHEMISTRY IN EVERYDAY LIFE
38432
To which class of dyes does phenolphthalein belong
