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When water is added to calcium oxide, the container becomes hot. What does this indicate?कैल्शियम ऑक्साइड में जल मिलाने पर बर्तन गर्म हो जाता है। यह क्या दर्शाता है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: Heat was releasedऊष्मा निकली
Calcium oxide reacts with water to form calcium hydroxide: \(\mathrm{CaO + H_2O \rightarrow Ca(OH)_2}\). Heat is released during this reaction, so the container becomes hot. Therefore, it is an exothermic reaction. In contrast, if heat were absorbed as in option A, the container would tend to become cooler.कैल्शियम ऑक्साइड जल के साथ अभिक्रिया करके कैल्शियम हाइड्रॉक्साइड बनाता है: \(\mathrm{CaO + H_2O \rightarrow Ca(OH)_2}\)। इस अभिक्रिया में ऊष्मा निकलती है, इसलिए बर्तन गर्म हो जाता है। अतः यह एक ऊष्माक्षेपी अभिक्रिया है। विकल्प A में ऊष्मा अवशोषित होने पर बर्तन ठंडा होने की प्रवृत्ति होती।
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