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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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(157)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- What will be the partial pressure of He and O₂, if 200 mL of He at 0.66 atm and 400 mL
- Heat of formation of H₂O(g) at 25⁰C is -243 kJ,ΔE for the reaction
- The compound which on reaction with aqueous nitrous acid at low temperature
- Starch is converted into maltose by an enzyme
- When ethyl chloride and alcoholic KOH are heated, the compound obtained is
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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