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Acids, Bases and Salts

A quiz on acids, bases, and salts covering their properties, sources, chemical formulas, and indicators used to identify them.

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Match the following:
a. Lemons 1. Oxalic acid
b. Goose berries 2. Citric acid
c. Tomato 3. Tartartic acid
  1. a - 2, b - 1, c - 3
  2. a - 2, b - 3, c - 1
  3. a - 1, b - 3, c - 2
  4. a - 1, b - 2, c - 3
  5. a - 3, b - 2, c - 1
Question 2 Multiple Choice (Single Answer)

If the yellow stain of turmeric is rubbed with soap solution, the colour of stain changes to brownish red. It happens due to the presence of a chemical called _______________ in the soap solution.

  1. potassium hydroxide
  2. sodium hydroxide
  3. calcium hydroxide
  4. ammonium hydroxide
  5. magnesium hydroxide
Question 3 Multiple Choice (Single Answer)

The sting of ants and bees contain ___________, which when injected causes painful irritation and swelling.

  1. formic acid
  2. sulphuric acid
  3. hydrochloric acid
  4. oxalic acid
  5. lactic acid
Question 4 Multiple Choice (Single Answer)

Match the following acids with their sources:
a. Malic acid 1. Sour milk
b. Acetic acid 2. Apples
c. Lactic acid 3. Proteins
d. Amino acid 4. Vinegar
  1. a - 2, b - 4, c - 1, d - 3
  2. a - 2, b - 4, c - 3, d - 1
  3. a - 4, b - 2, c - 1, d - 3
  4. a - 3, b - 4, c - 1, d - 2
  5. a - 2, b - 1, c - 4, d - 3
Question 5 Multiple Choice (Single Answer)

Which of the following is not an indicator?

  1. Turmeric
  2. Litmus
  3. Phenolphthalein solution
  4. Alcohol
  5. China rose paper
Question 6 Multiple Choice (Single Answer)

Which of the following is a mineral acid?

  1. Formic acid
  2. Amino acid
  3. Malic acid
  4. Nitric acid
  5. Acetic acid
Question 7 Multiple Choice (Single Answer)

Which of the following statements is / are false:

(a) The neutral litmus solution turns red when added to some acidic solution.
(b) Turmeric, as an indicator identifies acidic solutions only. Its colour does not change in basic solutions.
(c) The litmus dye is extracted from lichen plants found in Tundra region.

  1. only (a)
  2. (a) and (b)
  3. only (b)
  4. (a) and (c)
  5. only (c)
Question 8 Multiple Choice (Single Answer)

Which of the following is an organic acid?

  1. Hydrochloric acid
  2. Sulphuric acid
  3. Phosphoric acid
  4. Oxalic acid
  5. Boric acid
Question 9 Multiple Choice (Single Answer)

Match the following acids with their formulae:
1. Phosphoric acid a. HCL
2. Nitric acid b. H3PO4
3. Hydrochloric acid c. H2SO4
4. Sulphuric acid d. HNO3
  1. 1 - b, 2 - a, 3 - d, 4 - c
  2. 1 - c, 2 - d, 3 - a, 4 - b
  3. 1 - d, 2 - b, 3 - a, 4 - c
  4. 1 - b, 2 - d, 3 - c, 4 - a
  5. 1 - b, 2 - d, 3 - a, 4 - c
Question 10 Multiple Choice (Single Answer)

The pink colour of china rose solution does not change in colour, when treated with the solution of ___________________.

  1. aerated water
  2. nitric acid
  3. common salt
  4. baking soda
  5. lime water
Question 11 Multiple Choice (Single Answer)

Match the following:
a. When used as an indicator, the colour of solution of china rose changes to green in 1. neutral solutions
b. When used as an indicator, the colour of solution of china rose does not changes its colour in 2. acidic solutions
c. When used as an indicator, the colour of solution of china rose changes to magenta in 3. basic solutions
  1. a - 3, b - 1, c - 2
  2. a - 2, b - 1, c - 3
  3. a - 1, b - 3, c - 2
  4. a - 3, b - 2, c - 1
  5. a - 2, b - 3, c - 1
Question 12 Multiple Choice (Single Answer)

Phenolphthalein, when added to _______________ , will remain colourless.

  1. soap
  2. shampoo
  3. baking soda
  4. lime water
  5. lemon juice
Question 13 Multiple Choice (Single Answer)

Which of the following is not a physical property of bases?

  1. All bases are slippery to touch.
  2. Bases turn red litmus solution black.
  3. They have a bitter taste.
  4. Bases turn phenolphthalein solution pink.
  5. Bases like sodium hydroxide, potassium hydroxide are corrosive in nature.
Question 14 Multiple Choice (Single Answer)

Match the following:
Name of base Found in Chemical formula
1. Ammonium hydroxide a. Limewater p. Mg(OH)2
2. Magnesium hydroxide b. Window cleaner solution q. KOH
3. Calcium Hydroxide c. Liquid soap r. Ca(OH)2
4. Potassium hydroxide d. Milk of magnesia s. NH4OH
  1. 1 - b - s, 2 - d - p, 3 - a - q, 4 - c - r
  2. 1 - b - s, 2 - d - p, 3 - a - r, 4 - c - q
  3. 1 - b - p, 2 - d - s, 3 - a - r, 4 - c - q
  4. 1 - d - s, 2 - b - p, 3 - a - r, 4 - c - q
  5. 1 - b - s, 2 - d - p, 3 - c - r, 4 - a - q
Question 15 Multiple Choice (Single Answer)

Which of the following is not a physical property of acids?

  1. They turn blue litmus solution red.
  2. They have a sweet taste.
  3. They do not affect turmeric solution.
  4. They do not affect phenolphthalein solution.
  5. They are highly corrosive.
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