Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

How is plaster of Paris prepared from gypsum?

Answer and explanation

Correct answer: By controlled heating of gypsum

Gypsum is calcium sulphate dihydrate, CaSO₄·2H₂O. When it is heated carefully at about 373 K, part of its water of crystallisation is removed and calcium sulphate hemihydrate, CaSO₄·½H₂O, is formed; this is plaster of Paris. Controlled heating is essential because excessive heating can remove too much water and produce a different form. Therefore option A is correct, while mixing salt, cooling, or converting it to sugar is irrelevant.

Related tags

GypsumPlaster Of ParisControlled HeatingAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.