Which metal sulphate, composed of potassium, aluminium, and sulphate ions in the ratio 1 : 1 : 2, plays a role as a flame
retardant, a mordant and an astringent?
This questions was previously asked in
SSC CHSL 31st May 2022 Shift-3
Potash alum
Correct AnswerEpsom salts
Incorrect AnswerCelestite
Incorrect AnswerExplanation:
- Potash alum
- Chemical formula: KAl(SO4)2·12H2O.
- Contains: Potassium (K?), Aluminum (Al³?), and Sulfate ions (SO4²?) in a 1:1:2 ratio.
- Uses: Flame-retardant, mordant in dyeing, and astringent properties.
- Correct Answer
- Gypsum
- Mainly calcium sulfate dihydrate (CaSO4·2H2O).
- Commonly used in construction and as a fertilizer.
- Epsom salts
- Composed of magnesium sulfate (MgSO4·7H2O).
- Typically used in bath salts and as a laxative.
- Celestite
- Contains strontium sulfate (SrSO4).
- Primarily used as a source of strontium for fireworks and flares.
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By: santosh