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Control And Coordination

Question

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Given below are the pH values of four different liquids. 7.0, 14.0, 4.0, 2.0, Which of these could be that of

(i) Lemon juice (ii) Distilled water
(iii) 1 M NaOH (iv) Tomato juice.

Solution

(i) Lemon juice 2.0

(ii) Tomato juice 4.0

(iii) Distilled water 7.0

(iv) 1 M NaOH 14.0

Some More Questions From Control and Coordination Chapter

Give two physical characteristics each of acids and bases.

What are indicators? Name four acid-base indicators and mention their colour change.

What are antacids?

What are olfactory indicators?

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.

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