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Alum in dyeing of clothes is used as
Options
(a) bleaching agent
(b) fire proof material
(c) mordant of colour
(d) diluent
Correct Answer:
mordant of colour
Explanation:
Alums are the double salts of the formula X₂SO₄. Y₂(SO₄)₃. 24H₂O where X represents a monovalent cation such as Na⁺, K⁺ and NH₄⁺ while Y is a trivalent cation such as Al³⁺ , Cr³⁺ and Fe³⁺. these alums are used as mordant by dyers of clothes for fixing the dye.
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- If KMnO₄ is reduced by oxalic caid, in an acidic medium, then oxidation number of Mn changes from
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Topics: S and Some P Block Elements
(157)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Hydrogen burns in air with a
- If KMnO₄ is reduced by oxalic caid, in an acidic medium, then oxidation number of Mn changes from
- Addition of phosphate fertilizers into water leads to
- The unit of second order reaction rate constant is
- In the Kjeldahl’s method for estimation of nitrogen present in a soil sample
Topics: S and Some P Block Elements (157)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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