Lakhmir Singh solutions for केमिस्ट्री [अंग्रेजी] कक्षा १० आईसीएसई chapter 3 - Acids, Bases and Salts [Latest edition]

State whether the following statement is True or False.

Acids ionise to give hydronium ions in the solution.

State whether the following statement is True or False.

Hydrogen sulphites react with acids to give salt, carbon dioxide and water.

State whether the following statement is True or False.

Ethanol water solution does not change the colour of blue litmus.

State whether the following statement is True or False.

Acetic acid ionises completely in aqueous solution.

The strength of an acid depends on the amount of ______ ions furnished in aqueous solution.

The sour taste of lemon is due to the presence of ______ acid.

Sulphite + Acid → Salt + ______ + Water

SO₃ + H₂O → ______

When a sulphite reacts with an acid, the gas evolved is ______.

Identify the dibasic acid.

Which of the following acids is an organic acid?

Which of the following acids, is not significantly corrosive and is used in fizzy drinks?

How is an acid chemically defined? Explain with an example.

What are organic acids? Given examples.

What are inorganic acids? Give examples.

Which gas is liberated when an acid reacts with a sodium hydrogen sulphite?

What is a dibasic acid? Give an example.

Why acids are good conductors of electricity.

How would you prepare sulphuric acid from a non-metal? Give the reaction involved.

What happens when an acid reacts with a metal carbonate? Explain with the help of an example. Write chemical equation of the reaction involved.

What do you observe when barium chloride solution is added to dilute sulphuric acid?

State whether the following statement is True or False.

A base gives salt and water as by products on reacting with acids.

State whether the following statement is True or False.

Copper hydroxide dissolves in water and thus is an alkali.

State whether the following statement is True or False.

Strong bases have high concentrations of hydroxide ions.

State whether the following statement is True or False.

Non-metallic oxide with carbon dioxide gives salt and water only.

State whether the following statement is True or False.

Bases are good conductors of electricity.

When a base is dissolved in water, it gives ______ ions as the only negatively charged ions.

When sodium hydroxide reacts with ammonium chloride ______ gas is evolved.

\[\ce{Metal nitrate ->[\Delta] Basic oxide +}\] ______ \[\ce{+ Oxygen}\]

Which of the following metal oxides is not a base?

Sodium hydroxide absorbs carbon dioxide to form ______.

Metal carbonate decomposes on heating to evolve ______.

What is the colour change observed when a litmus paper is put in a basic solution?

What is the difference between an alkali and a base?

Which base is used as an antacid?

Differentiate between a strong base and a weak base.

How is a base prepared by double decomposition? Explain, giving an example.

What happens when a non-metallic oxide is added to a base? Give the chemical equation involved.

What happens when aqueous zinc sulphate is added to sodium hydroxide? Give the chemical equation of the reaction involved.

State whether the following statement is True or False.

An aqueous solution of base only contains hydroxide ions in the solution.

State whether the following statement is True or False.

A solution of pH = 8 is a basic solution.

State whether the following statement is True or False.

The pink colour of the universal indicator implies the substance is a base.

State whether the following statement is True or False.

Quick lime is added to a basic soil.

State whether the following statement is True or False.

A solution of pH 12 is more basic than a solution of pH 11.

State whether the following statement is True or False.

The colour of phenolphthalein changes from colourless to pink in an acidic medium.

Tooth decay starts when the pH of the mouth falls below ______.

The higher the value of pH, the stronger is the ______.