• Acids, Bases and Salts - 1
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Acids, Bases and Salts - 1

Description: Acids, Bases and Salt - 1
Number of Questions: 10
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Tags: Acids Bases and Salt - 1 Acids, Bases & Salts Acids and Bases
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What is the colour of phenolphthalein indicator in a neutral state?

  1. It is blue in colour.

  2. It is pink in colour.

  3. It is colourless.

  4. It is red in colour.

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Correct Option: C
Explanation:

Correct answer is option (3).

Which of the following substances will produce hydrogen ions on dissolving in water?

  1. HCl

  2. NH4OH

  3. NaOH

  4. KOH

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Correct Option: A
Explanation:

HCl will produce hydrogen ions on dissolving in water. 

Which of the following acids is present in tomatoes?

  1. Oxalic acid

  2. Lactic acid

  3. Citric acid

  4. Acetic acid

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Correct Option: A
Explanation:

Oxalic acid is present in tomatoes.

Which of the following statements is not correct?

  1. A base is a compound which contains either oxide or hydroxide ions.

  2. NH3 when dissolved in water, forms an alkaline solution.

  3. A base is an electron acceptor.

  4. An aqueous solution of a base feels soapy to touch.

Show answer
Correct Option: A
Explanation:

Correct answer is option (1).

Which of the following is not a property of acids?

  1. All acids have a sour taste.

  2. Acids turn blue litmus red.

  3. Acids turn red litmus blue.

  4. All acids form H+ ions in water.

Show answer
Correct Option: C
Explanation:

Bases turn red litmus blue, so it is not a property of acids. 

Methyl orange indicator gives _______ colour in strong acid solution.

  1. blue

  2. pink

  3. green

  4. red

Show answer
Correct Option: D
Explanation:

Correct answer is option (4).

Addition of methyl orange to sodium bicarbonate produces __________ colour.

  1. red

  2. green

  3. yellow

  4. orange

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Correct Option: C
Explanation:

Addition of methyl orange to sodium bicarbonate produces yellow colour. 

Which of the following statements is/are true with regard to slaked lime?

  1. Does not change the colour of litmus paper

  2. Does not change the colour of red phenolphthalein

  3. Changes red litmus solution to blue

  4. All of the above

Show answer
Correct Option: C
Explanation:

Correct answer is option (3).

Which of the following acts as a proton acceptor?

  1. HCl

  2. HNO3

  3. H2SO4

  4. Ca(OH)2

Show answer
Correct Option: D
Explanation:

Correct answer is option (4).

Which of the following substances is not an alkali?

  1. Al(OH)3

  2. Mg(OH)2

  3. Ca(OH) 2

  4. KOH

Show answer
Correct Option: A
Explanation:

Correct answer is option (1).

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