Write balanced chemical equation : An aqueous calcium hydroxide solution (lime water) reacts with carbon dioxide gas to produce calcium carbonate and water.

Write balanced chemical equation : An aqueous calcium hydroxide s…

How will you prove that oxide formed by burning sodium is basic in nature?

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Why are alloys made?

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How is greenhouse effect produced?

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Define a chemical change. Give two examples of the above changes.

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Write the balanced equations :
Sodium hydroxide reacts with carbon dioxide

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When blue litmus is introduced into a jar containing carbon dioxide

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Support with example that compound formation take place with energy changes, using water formation and iron sulphide formation.

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An element $X$ has the valency $3$ while element $Y$ has the valency $2.$ Write the formula of the compound formed between $X$ an $Y.$

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What is an amalgam? How does an amalgam different from an alloy?

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Define the following :Molecules

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