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Which among the following statements is incorrect for magnesium metal? - Science

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प्रश्न

Which among the following statements is incorrect for magnesium metal?

विकल्प

  • It burns in oxygen with a dazzling white flame

  • It reacts with cold water to form magnesium oxide and evolves hydrogen gas

  • It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas

  • It reacts with steam to form magnesium hydroxide and evolves hydrogen gas

MCQ

उत्तर

It reacts with cold water to form magnesium oxide and evolves hydrogen gas

Explanation - 

Magnesium does not react with cold water. It only reacts with hot water or steam to form magnesium hydroxide and hydrogen gas.

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अध्याय 3: Metals and Non-metals - Multiple Choice Questions [पृष्ठ २२]

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एनसीईआरटी एक्झांप्लर Science [English] Class 10
अध्याय 3 Metals and Non-metals
Multiple Choice Questions | Q 27. | पृष्ठ २२

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Three metal samples of magnesium, aluminium and iron were taken and rubbed with sandpaper. These samples were then put separately in test tubes containing dilute hydrochloric acid. Thermometers were also suspended in each test tube so that their bulbs dipped in the acid. The rate of formation of bubbles was observed. The above activity was repeated with dilute nitric acid and the observations were recorded.

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OR

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