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What happens when zinc granules are heated with sodium hydroxide solution? Write the equation of the reaction which takes place.
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What is the common name of water soluble bases?
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Which chemical is injected into the skin of a person during an ant’s sting?
How can the effect of these stings be neutralised?
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Which chemical is injected into the skin of a person during the nettle leaf hair sting?
How can the effect of this sting be neutralised?
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Balance the following chemical equation:
\[\ce{FeSO4 ->[Heat] Fe2O3 + SO2 + SO3}\]
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Balance the following chemical equation:
\[\ce{Pb(NO3)2_{(s)} ->[Heat] PbO_{(s)} + NO2_{(g)} + O2_{(g)}}\]
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What happens during a bee sting? What is its remedy?
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What happens during a wasp sting? What is its remedy?
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Why is it wrong to treat a bee sting with vinegar?
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Why is it wrong to treat a wasp sting with baking soda solution?
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Which acid is produced in our stomach? What happens if there is an excess of acid in the stomach? How can its effect be cured?
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The soil in a field is highly acidic. Name two materials which can be added to this soil to reduce its acidity. Give the reason for your choice.
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Zinc oxide reacts with carbon, on heating, to form zinc metal and carbon monoxide. Write a balanced chemical equation for this reaction. Name
- oxidising agent, and
- reducing agent,
in this reaction.
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Give the names and formulae of two strong bases.
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What type of ions are formed?
When an acid is dissolved in water.
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Write the neutralisation reaction between acids and bases in terms of the ions involved.
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Write any two important uses of bases.
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What happens when bases react with non-metal oxides? Explain with the help of an example. What does this reaction tell us about the nature of non-metal oxides?
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What effect does the concentration of \[\ce{H+_{( aq)}}\] ions have on the nature of a solution?
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Express the following facts in the form of a balanced chemical equation:
“When a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed”.
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