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Complete and balance the following equation:
Cu (NO3)2 (aq) + Zn(s) →
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Magnesium liberates ............... gas on reacting with hot boiling water.
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Fill in the following blank with suitable word:
The white powder formed when magnesium ribbon burns in oxygen is of ....................
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Ordinary aluminium strips are not attacked by water because of the presence of a layer of ................. on the surface of aluminium.
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Calcium is a ................. reactive metal than sodium.
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With the help of examples, describe how metal oxides differ from non-metal oxides.
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Which of the following elements would yield an acidic oxide.
Na, S, C, K, H
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Which of the following elements would yield a basic oxide.
Na, S, C, K, H
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Which of the following elements would yield a neutral oxide?
Na, S, C, K, H
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What is the nature of the oxide Na2O? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.
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What type of oxides are formed when non-metals react with oxygen? Explain with an example.
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What type of oxides are formed when metals combine with oxygen? Explain with the help of an example.
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Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid.
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Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.
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How do metals react with hydrogen? Explain with an example.
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How do non-metals react with hydrogen? Explain with an example.
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What happens when calcium reacts with chlorine? Write an equation for the reaction which takes place
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What happens when magnesium reacts with very dilute nitric acid? Write an equation for the reaction involved.
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Arrange the following metals in order of their chemical reactivity, placing the most reactive metal first:
Magnesium, Copper, Iron, Sodium, Zinc, Lead, Calcium.
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What happens when a rod of zinc metal is dipped into a solution of copper sulphate? Give chemical equation of the reaction involved.
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