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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement
A pop sound is heard when a lighted match stick is brought near the mouth of a jar. This indicates the release of gas.
विकल्प
oxygen
hydrogen
nitrogen
water-vapour
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उत्तर
hydrogen
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संबंधित प्रश्न
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Higher order Thinking question
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