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प्रश्न
Explain the following:
Bubbles are produced when acetic acid is added to a solution of sodium hydrogencarbonate.
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उत्तर
When acetic acid is added to a solution of sodium hydrogencarbonate, carbon dioxide gas is formed which comes out in the form of bubbles.
Sodium hydrogencarbonate + Acetic acid → Sodium carbonate + Water + Carbon dioxide
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संबंधित प्रश्न
Tinning : Tin : : Galvanizing : _________
Explain why, through aluminium is more reactive than iron, yet there is less corrosion of aluminium when both are exposed to air.
Name any two metals which do not corrode easily.
Name two metals which resist corrosion due to the formation of a thin, hard and impervious layer of oxide on their surface.
A metal X which is resistant to corrosion is produced by the electrolysis of its molten oxide whereas another metal Y which is also resistant to corrosion is produced by the reduction of its oxide with carbon. Metal X can be used in powder form in thermite welding whereas metal Y is used in making cathodes of ordinary dry cells.
(a) Name the metals X and Y.
(b) Which of the two metals is more reactive : X or Y?
(c) Name one ore or metal X. Also write its chemical formula.
(d) Name one ore or metal Y. Also write its chemical formula.
(e) Name one alloy of metal X and one alloy of metal Y.
Explain how the activity series accounts for each of the following:
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Give a reason why rust turns moist red litmus blue.
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Explain the following:
Lime water turns milky on passing carbon dioxide gas into it.
