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Control And Coordination

Question
CBSEENSC10014634
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Which of the following observations is true about dilute solution of acetic acid?

  • It smells like vinegar and turns red litmus blue 

  • It smells like onion and turns blue litmus red

  • It smells like orange and turns red litmus blue

  • It smells like vinegar and turns blue litmus red

Solution

D.

It smells like vinegar and turns blue litmus red

The odor of vinegar is same as that of acetic acid. Also, being an acid (though weak) it turns blue litmus to red. 

Some More Questions From Control and Coordination Chapter

You are given the following solutions:

Hydrochloric acid (HCl), sulphuric acid (H2SO4), nitric acid (HNO3), acetic acid (CH3COOH), sodium hydroxide (NaOH), calcium hydroxide [(Ca(OH)2], potassium hydroxide (KOH), magnesium hydroxide [Mg(OH)2] and ammonium hydroxide (NH4OH). Give the colour change for each of these solutions with red litmus, blue litmus, phenolphthalein and methyl orange solutions.

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?

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