Acids, Bases and Salts

Covers properties, reactions, and applications of acids, bases, and salts including pH indicators, neutralization, and common compounds

21 Questions Published

Questions

Question 1 Multiple Choice (Single Answer)

Which of the following statements is/are false?

a. An alkali turns red litmus to blue.
b. Methyl orange indicator gives yellow colour in basic solution.
c. Phenolphthalein is pink in colour in an acid solution.

  1. Only a
  2. Both a and b
  3. Only b
  4. Both b and c
  5. Only c
Question 2 Multiple Choice (Single Answer)

_______________ is used in the manufacture of plastics, paints and dyes.

  1. Sulphuric acid
  2. Hydrochloric acid
  3. Acetic acid
  4. Tartaric acid
  5. Carbonic acid
Question 3 Multiple Choice (Single Answer)

Weak acids have low electrical conductivity. Which of the following is a weak acid?

  1. Sulphurous acid
  2. Sulphuric acid
  3. Hydrochloric acid
  4. Nitric acid
  5. None of these
Question 4 Multiple Choice (Single Answer)

Acids are stored in containers made of glass and ceramics because containers made of glass and ceramics

  1. are not attacked by bases
  2. are not attacked by acids
  3. do not corrode
  4. protects acids from moisture
  5. are very durable
Question 5 Multiple Choice (Single Answer)

Which of the following acids is used for removing oxide film from steel objects?

  1. Sulphuric acid
  2. Hydrochloric acid
  3. Acetic acid
  4. Nitric acid
  5. Carbonic acid
Question 6 Multiple Choice (Single Answer)

Which of the following is not a property of a base?

  1. Bases have bitter taste.
  2. Bases feel soapy to touch.
  3. Bases turn red litmus to blue.
  4. Bases react with some metals to form hydrogen gas.
  5. Bases react with metal oxides to form salt and water.
Question 7 Multiple Choice (Single Answer)

Egg shells are made up of which of the following compounds?

  1. Sodium chloride
  2. Sodium carbonate
  3. Sodium hydroxide
  4. Calcium carbonate
  5. Calcium hydroxide
Question 8 Multiple Choice (Single Answer)

Most of the bases do not dissolve in water, but some do. Which of the following bases dissolve in water?

  1. Na2CO3
  2. NaHCO3
  3. Mg(OH)2
  4. CaO
  5. CaCO3
Question 9 Multiple Choice (Single Answer)

Which of the following solutions will have a pH of exactly 7?

  1. Hydrochloric acid
  2. Sodium chloride
  3. Magnesium hydroxide
  4. Acetic acid
  5. Sodium hydroxide
Question 10 Multiple Choice (Single Answer)

Which of the following acid is naturally produced in a human's stomach?

  1. Sulphuric acid
  2. Tartaric acid
  3. Citric acid
  4. Hydrochloric acid
  5. Formic acid
Question 11 Multiple Choice (Single Answer)

Which of the following statements is/are false?

a. Solutions having pH lesser than 7 are acidic in nature and will turn methyl orange indicator red.
b. Both acidic and basic solutions contain hydrogen ions.
c. Substances having pH of more than 7 will turn phenolphthalein indicator blue.

  1. Only a
  2. Both a and b
  3. Only b
  4. Both b and c
  5. Only c
Question 12 Multiple Choice (Single Answer)

If the soil in a field is having low pH, then it can be treated with which of the following?

a. Calcium oxide
b. Calcium carbonate
c. Sodium chloride

  1. Only a
  2. Both a and b
  3. Only c
  4. Both a and c
  5. Both b and c
Question 13 Multiple Choice (Single Answer)

Which of the following salts will give a neutral solution?

  1. Ammonium chloride
  2. Potassium sulphate
  3. Ammonium sulphate
  4. Sodium carbonate
  5. Sodium acetate
Question 14 Multiple Choice (Single Answer)

Sodium hydroxide is obtained by the electrolysis of sodium chloride solution. Which of the following is not a use of sodium hydroxide?

  1. Sodium hydroxide is used for making soaps and detergents.
  2. Sodium hydroxide is used for making artificial textile fibre.
  3. Sodium hydroxide is used in the manufacturing of paper.
  4. Sodium hydroxide is used in purifying bauxite ore.
  5. Sodium hydroxide is used for making solvents for drycleaning.
Question 15 Multiple Choice (Single Answer)

Which of the following is used to remove the permanent hardness of water?

  1. Sodium carbonate
  2. Sodium hydroxide
  3. Sodium hydrogencarbonate
  4. Sodium chloride
  5. Sodium acetate
Question 16 Multiple Choice (Single Answer)

Which of the following is also called as the chloride of lime?

  1. Baking soda
  2. Baking powder
  3. Bleaching powder
  4. Plaster of Paris
  5. Caustic soda
Question 17 Multiple Choice (Single Answer)

Organic acids are the naturally occurring acids. Which of the following is not an organic acid?

  1. Acetic acid
  2. Citric acid
  3. Lactic acid
  4. Tartaric acid
  5. Nitric acid
Question 18 Multiple Choice (Single Answer)

Match the following:

 
Salts Formula
a. Calcium chloride 1. CaCO3
b. Calcium sulphate 2. CaCl2
c. Calcium carbonate 3. CaSO4
  1. a - 1, b - 3, c - 2
  2. a - 2, b - 3, c - 1
  3. a - 3, b - 2, c - 1
  4. a - 1, b - 2, c - 3
  5. a - 2, b - 1, c - 3
Question 19 Multiple Choice (Single Answer)

Which of the following is used in chemistry laboratories for sealing air-gaps in apparatus where air-tight arrangement is required?

  1. Plaster of Paris
  2. Bleaching powder
  3. Baking soda
  4. Washing soda
  5. Caustic soda
Question 20 Multiple Choice (Single Answer)

The presence of which of the following ions gives an acid solution its acidic properties?

  1. Sulphur ions
  2. Potassium ions
  3. Hydrogen ions
  4. Copper ions
  5. Magnesium ions
Question 21 Multiple Choice (Single Answer)

Match the following:

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Acids Sources
a. Acetic acid 1. Orange
b. Citric acid 2. Curd
c. Lactic acid 3. Vinegar
  1. a - 3, b - 1, c - 2
  2. a - 3, b - 2, c - 1
  3. a - 1, b - 2, c - 3
  4. a - 1, b - 3, c - 2
  5. a - 2, b - 1, c - 3