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Properties of Bases

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Questions and Answers

What is the indication of a base solution on a litmus paper?

It remains unchanged
It turns yellow
It turns blue (correct)
It turns red

What is the purpose of hydroxyl ions in the Lime-Soda Softening Process?

To remove water hardness (correct)
To increase water pH
To decrease water temperature
To add calcium to water

What is water hardness caused by?

Dissolved salts of sodium and potassium
Dissolved salts of zinc and silver
Dissolved salts of calcium and magnesium (correct)
Dissolved salts of iron and copper

What is the dissociation product of NaOH in water?

Na+ and OH- (A) Signup and view all the answers

How many hydroxyl ions per molecule can calcium hydroxide (Ca(OH)2) furnish?

Two (C) Signup and view all the answers

What is the purpose of phenolphthalein in base solution?

To indicate basicity (C) Signup and view all the answers

What is the product of the reaction between Ca(HCO3)2 and Ca(OH)2 in the Lime-Soda Softening Process?

2CaCO3(S) (A) Signup and view all the answers

Which of the following is a property of strong solutions of bases?

They are caustic and have a slippery feel (B) Signup and view all the answers

What is the purpose of adding sodium hydroxide to glyceryl stearate in soap manufacturing?

To form a metallic salt (B) Signup and view all the answers

What is the purpose of the liming process in the leather industry?

To remove the hair from the epidermis (B) Signup and view all the answers

What is the reaction between a base and the oxide of a non-metal?

Forming a metallic salt and water (B) Signup and view all the answers

What is the application of the ability of a hydroxide solution to dissolve lignin in the pulp and paper industry?

To remove the lignin from the cellulose fibers (B) Signup and view all the answers

In the air-separation process, what is the purpose of the potassium hydroxide solution?

To remove carbon dioxide content (A) Signup and view all the answers

What is the result of the reaction between MgCl2 and Ca(OH)2 in the Lime-Soda Softening Process?

Mg(OH)2(S) and CaCl2 (C) Signup and view all the answers

What is produced during the saponification reaction in soap manufacture?

Sodium stearate and glycerin (B) Signup and view all the answers

What is the effect of strong solutions of bases on wooden materials?

They destroy them by dissolving the lignin (B) Signup and view all the answers

What is the purpose of using sodium hydroxide in paper manufacturing?

To digest wood chips to produce pulp (B) Signup and view all the answers

What is the general reaction of a base solution with a fat?

Fat + Base → Metallic Salt + Alcohol (D) Signup and view all the answers