To get her house whitewashed, an officer bought 10 kg of quicklime from the market and dissolved it in 30 L of water. She noticed that the mixture appeared to be boiling even though it was not being heated. Choose the corresponding product formed and the type of reaction involved.

Product: Limestone
Type of reaction: Endothermic

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Product: Limewater
Type of reaction: Endothermic

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Product: Slaked lime
Type of reaction: Exothermic

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Product: Limestone
Type of reaction: Exothermic

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Solution

The correct option is D Product: Limestone
Type of reaction: Exothermic
Quicklime (CaO) reacts with water to form calcium hydroxide Ca(OH)2. This reaction releases so much heat that it can result in boiling of water.

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A house wife wanted her house to be white washed. She bought 10 kg of quick lime from the market and dissolved in 30 litres of water. On adding lime to the water, she noticed that the water started boiling even when it was not being heated. Give reason for her observation. Write the corresponding equations and name the product formed. [3 MARKS]

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To get her house whitewashed, an officer bought 10 kg of quicklime from the market and dissolved it in 30 L of water. She noticed that the mixture appeared to be boiling even though it was not being heated. Choose the corresponding product formed and the type of reaction involved.

The correct option is D Product: Limestone Type of reaction: ExothermicQuicklime (CaO) reacts with water to form calcium hydroxide Ca(OH)2. This reaction releases so much heat that it can result in boiling of water.

The correct option is D Product: Limestone
Type of reaction: Exothermic
Quicklime (CaO) reacts with water to form calcium hydroxide Ca(OH)2. This reaction releases so much heat that it can result in boiling of water.