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Important Questions on Acids, Bases and Salts

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Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
Dry hydrogen chloride gas does not change the colour of dry litmus paper. Why ?
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Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid?
EASY
Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
Which of the following phenomena occur, when a small amount of acid is added to water?
MEDIUM
Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
Do basic solutions also have H+(aq) ions? If yes, then why are they basic?
HARD
Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
Compounds such as alcohol and glucose also contain hydrogen but are not categorised as acids. Describe an activity to prove it.
MEDIUM
Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
How is the concentration of hydronium ions (H3O+) affected when the solution of an acid is diluted?
HARD
Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
Why does an aqueous solution of acid conduct electricity?
EASY
Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
What type of ions are formed:
(i) when an acid is dissolved in water?
(ii) when a base (or alkali) is dissolved in water?
MEDIUM
Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
While diluting a mineral acid why is it recommended to add acid slowly to water and not water to acid. Explain.
HARD
Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
Why do HCl,H2SO4,HNO3, etc., show acidic character in aqueous solutions while solutions of compounds like C6H12O6 (glucose) and C2H5OH (alcohol) do not show acidic character?
HARD
Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
Why does dry HCl gas not change the colour of dry litmus paper?
HARD
Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
Why do acids not show acidic behaviour in the absence of water?
MEDIUM
Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
HCl and HNO3 show acidic characters in aqueous solution while alcohol and glucose solutions do not. Give reason.
HARD
Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
With the help of labelled diagrams, describe an activity to show that acids produce ions only in aqueous solutions.
HARD
Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
How is the concentration of hydronium ions H3O+ affected when a solution of an acid is diluted?
MEDIUM
Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
Both ethyl alcohol C2H5OH and glucose C6H12O6 contain hydrogen but do not give the characteristics tests of acids. Assign reason.
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Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases

What is meant by strong acids and weak acids?

Classify the following into strong acids and weak acids:
HCl, CH3COOH, H2SO4, HNO3, H2CO3, H2SO3

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Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
What ions are present in the solutions of following substances? (write the symbols only)
(i) Hydrochloric acid (ii) Nitric acid (iii) Sulphuric acid (iv) Sodium hydroxide
(v) Potassium hydroxide (vi) Magnesium hydroxide
HARD
Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid?
HARD
Science>Chemistry>Acids, Bases and Salts>Nature of Acids and Bases
How is the concentration of hydroxide ions OH- affected when excess base is dissolved in a solution of sodium hydroxide?