Chemistry Icse

The nature of an antacid is ____.

Correct! Wrong!

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The nature of an antacid is basic. An antacid neutralizes the effect of an acid.

Methyl orange gives ____ colour when added to a solution of pH 8.

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Methyl orange gives yellow colour when added to a solution of pH 8. The solution is basic, since the pH of the solution is greater than 7.

Bases turn red litmus ____.

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Bases turn red litmus blue.

Which gas is liberated when acids react with metals?

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When acids react with metals, hydrogen in acids is liberated as hydrogen gas.

Acids are ____ to taste.

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Acids are sour to taste.

The compound formed when sodium hydroxide reacts with zinc is ____.

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The compound formed when sodium hydroxide reacts with zinc is sodium zincate. In this reaction hydrogen gas is also liberated.

The purple colour of cabbage ____ when it is dipped in an acid.

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The purple colour of cabbage turns red when it is dipped in an acid.

____ is used as raw material in the preparation of plaster of Paris.

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Gypsum is used as raw material in the preparation of plaster of Paris. Gypsum when heated to 120°C, loses a part of its water of crystallization and forms a white powder known as plaster of Paris.

Which of the following pH values corresponds to an acidic solution?

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A solution with pH 3 is acidic in nature. The pH range of acidic solutions is 0 - 7.

The pH scale was proposed by ____.

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The pH scale was proposed by Sorenson.

Bases are ____ to taste.

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Bases are bitter to taste.

Which of the following is true regarding bases?

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Basic solutions conduct electricity.

Washing soda is a base.

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Washing soda is sodium carbonate and it is a base.

Vinegar is a dilute solution of ____ acid.

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Vinegar is a dilute solution of acetic acid.

____ acid is present in curd.

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Lactic acid is present in curd. Milk has lactic acid and since, curd is a milk product, it has lactic acid.

Milk contains a ____.

Correct! Wrong!

Milk contains a weak acid called lactic acid.

When HCl spills on skin, it leaves ____ stain on skin.

Correct! Wrong!

When HCl spills on skin, it leaves an amber stain on skin.

Which of the following pH values corresponds to acidic solution?

Correct! Wrong!

A solution with pH 3 is acidic in nature. The pH range of acidic solutions is 0 - 7.

Which of the following indicators is not an acid-base indicator?

Correct! Wrong!

Vanilla is not an acid-base indicator.

Alkali metal oxides are ____ in nature.

Correct! Wrong!

Alkali metal oxides are basic in nature. When they are dissolved in water they form basic solutions.

Tooth enamel contains ____.

Correct! Wrong!

Tooth enamel contains calcium phosphate.

NaOH turns ____.

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NaOH is a base, therefore, it turns red litmus blue.

Epsom salt has 10 water molecules.

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Epsom salt has 7 water molecules

Which of the following indicator shows no change in acids?

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When phenolphthalein is added to an acid there is no change in its colour.

Acids do not react with metal carbonates.

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Acids react with metal carbonates and form the corresponding salt, carbon dioxide and water.

When sodium chloride is dissolved in water, a ____ solution is formed.

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When sodium chloride is dissolved in water, a neutral solution is formed.

Phenolphthalein gives pink colour in a basic solution.

Correct! Wrong!

Phenolphthalein gives pink colour in a basic solution.

Which acid is present in baking powder?

Correct! Wrong!

Tartaric acid is present in baking powder. Tartaric acid is one of the components of baking powder along with sodium hydrogen carbonate.

____ hydroxyl groups are present in ferric hydroxide.

Correct! Wrong!

3 hydroxyl groups are present in ferric hydroxide.

Acids change the orange colour of methyl orange to ____.

Correct! Wrong!

Acids change the orange colour of methyl orange to red.

Acids, Bases And Salts MCQs
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