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

Why is plaster of Paris kept in a closed container away from moisture?

Answer and explanation

Correct answer: Moisture can convert it into hard gypsum

Plaster of Paris is calcium sulphate hemihydrate, CaSO4·1/2H2O. Its governing property is that it reacts with water and changes into gypsum, CaSO4·2H2O. This hydration causes the powder to set into a hard mass, so moisture during storage can spoil its usefulness. Therefore option A is correct; the other options describe chemically impossible effects.

Related tags

Plaster Of ParisGypsumMoisture StorageAcidsBasesAnd 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.