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Question

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What is common between bases and metal oxides? How will you prove your answer?

Solution

Both Metal oxides and bases react with acids to give salt and water.

Base + acid → Salt + water
Metal oxide + acid → Salt + water

Illustration: Take small amount of copper oxide in a beaker. Note its colour. It is white. Now add dilute hydrochloric acid slowly white stirring. It will be seen that the colour of the solution changes slowly from white to blue-green. The blue-green colour of the solution is due to the formation of copper chloride in the solution.

CuO + 2HCl $\underset{}{\to}$ CuCl₂ + H₂O
Metal oxide Acid Salt Water

HCl + NaOH $\underset{}{\to}$ NaCl + H₂O
Acid base salt water

Some More Questions From Control and Coordination Chapter

Choose the olfactory indicators and give their characteristics: red cabbage extract, onion, vanilla extract, litmus, clove oil.

What do you understand by concentrated and dilute acids?

How do metals react with bases?

What is a neutralization reaction? Give some examples.

What are non-metallic oxides? Substantiate your answer.

Take 5 ml hydrochloric acid in a boiling tube or a conical flask. Add a few pieces of zinc granules to it.

(a) What do you observe on the surface of zinc granules?
(b) Name the gas evolved.
(c) What happens when the above gas is passed through soap solution?
(d) What happens when a burning candle is brought near the gas filled tube?

Name four acids and bases. Write their formulae.

Name the various kind of oxides and mention their properties.

What are acids? How are they produced?

Mention important characteristics of acids.

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