हिंदी

Write down the changes that will be seen in each instance and explain the reason behind them. Pieces of blue vitriol were heated in a test tube. On cooling, water was added to it. - Science and Technology

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प्रश्न

Write down the changes that will be seen in each instance and explain the reason behind them. 

Pieces of blue vitriol were heated in a test tube. On cooling, water was added to it.

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उत्तर

When pieces of blue vitriol are heated in a test tube, then the crystal structure of blue vitriol breaks down to form a colourless powder and water comes out. This water is called water of crystallization. when water is added to the same test tube, the white powder turns into a blue colour again. This is due to reversible reactions taking place from anhydrous salt to hydrous salt and vice-versa.

CUSO4 . 5H2O ↔ CUSO4 + 5H2O

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अध्याय 5: Acids, Bases and Salts - Exercises [पृष्ठ ७३]

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बालभारती Science and Technology [English] 9 Standard Maharashtra State Board
अध्याय 5 Acids, Bases and Salts
Exercises | Q 2. (h) | पृष्ठ ७३
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