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प्रश्न
When metals are dissolved in water the gas evolved is ______.
विकल्प
hydrogen
ammonia
carbon dioxide
nitrogen
MCQ
रिक्त स्थान भरें
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उत्तर
When metals are dissolved in water the gas evolved is hydrogen.
Explanation:
Active metals (like Sodium, Potassium, or Calcium) react vigorously with water to form metal hydroxides and liberate hydrogen gas (H2).
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