Science · Chemistry
The solubility of most solids increases with a rise in temperature. However, the solubility of which of the following compounds decreases as temperature increases?
- 1Copper sulfate
- 2Potassium nitrate
- 3Calcium hydroxide✓
- 4Sodium chloride
Correct answer
Calcium hydroxide
Explanation
स्पष्टीकरण:
सामान्यतः अधिकांश ठोस पदार्थों की विलेयता तापमान बढ़ाने पर बढ़ती है (क्योंकि घुलने की प्रक्रिया ऊष्माशोषी होती है)।
हालांकि, कैल्शियम हाइड्रॉक्साइड (
Ca(OH)
Ca(OH)
) जैसे कुछ यौगिकों की विलेयता तापमान बढ़ाने पर घटती है, क्योंकि इसका जलीय विलयन बनाना एक ऊष्माक्षेपी (Exothermic) प्रक्रिया है, जिसमें ऊष्मा निकलती है।
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