ACIDS, BASES AND SALTS MCQ

11/7/20244 min read

  1. How is the taste of curd described in the chapter?

a) Sweet
b) Sour
c) Bitter
d) Salty

Answer: b) Sour

  1. From which source is litmus extracted?

a) Turmeric
b) Beetroot
c) Lichens
d) China rose

Answer: c) Lichens

  1. What happens to blue litmus paper when it is exposed to an acid?

a) Stays blue
b) Turns yellow
c) Turns red
d) Turns green

Answer: c) Turns red

  1. Which of these is a natural indicator?

a) Phenolphthalein
b) Litmus
c) Methyl orange
d) Bromothymol blue

Answer: b) Litmus

  1. What is the nature of baking soda, as mentioned in the chapter?

a) Acidic
b) Basic
c) Neutral
d) None of the above

Answer: b) Basic

  1. Which acid is present in vinegar, according to the chapter?

a) Citric acid
b) Lactic acid
c) Acetic acid
d) Tartaric acid

Answer: c) Acetic acid

  1. What happens when turmeric is mixed with a basic solution?

a) Turns pink
b) Turns red
c) Turns yellow
d) Turns blue

Answer: b) Turns red

  1. Which of the following bases is found in window cleaners?

a) Sodium hydroxide
b) Ammonium hydroxide
c) Magnesium hydroxide
d) Calcium hydroxide

Answer: b) Ammonium hydroxide

  1. What happens to China rose indicator when an acid is added?

a) Turns yellow
b) Turns magenta
c) Turns blue
d) Turns green

Answer: b) Turns magenta

  1. What is the primary use of sodium hydroxide?

a) Used in baking
b) Used in cleaning
c) Used in medicine
d) Used in agriculture

Answer: b) Used in cleaning

  1. Which acid is found in an ant bite?

a) Lactic acid
b) Hydrochloric acid
c) Formic acid
d) Citric acid

Answer: c) Formic acid

  1. What is the result of the neutralisation process?

a) Only acid
b) Only base
c) Salt and water
d) Only water

Answer: c) Salt and water

  1. What causes red litmus paper to turn blue?

a) Acid
b) Salt
c) Water
d) Base

Answer: d) Base

  1. Which of these is not considered a natural acid, according to the chapter?

a) Citric acid
b) Ascorbic acid
c) Hydrochloric acid
d) Tartaric acid

Answer: c) Hydrochloric acid

  1. What is commonly used to treat indigestion?

a) Baking soda
b) Lime water
c) Milk of magnesia
d) Common salt

Answer: c) Milk of magnesia

  1. What is the primary component of an antacid?

a) Magnesium hydroxide
b) Sodium hydroxide
c) Calcium hydroxide
d) Ammonium hydroxide

Answer: a) Magnesium hydroxide

  1. What color does turmeric turn when it contacts a basic substance?

a) Red
b) Blue
c) Yellow
d) Green

Answer: a) Red

  1. Which substance is used to neutralize acidic soil?

a) Baking soda
b) Quick lime
c) Vinegar
d) Ammonium hydroxide

Answer: b) Quick lime

  1. Which of the following bases is used to treat acidic soil?

a) Sodium chloride
b) Calcium hydroxide
c) Sodium hydroxide
d) Magnesium hydroxide

Answer: b) Calcium hydroxide

  1. What color does phenolphthalein turn in a basic solution?

a) Red
b) Blue
c) Pink
d) Colorless

Answer: c) Pink

  1. What is the nature of lime water?

a) Acidic
b) Basic
c) Neutral
d) None of the above

Answer: b) Basic

  1. What is produced when an acid reacts with a base?

a) Salt and water
b) Only acid
c) Only base
d) Acid and base

Answer: a) Salt and water

  1. What is characteristic of substances that taste bitter and feel soapy?

a) Acidic
b) Basic
c) Neutral
d) Salty

Answer: b) Basic

  1. Which natural indicator comes from lichens?

a) Turmeric
b) Litmus
c) China rose
d) Beetroot

Answer: b) Litmus

  1. What happens to China rose indicator in a basic solution?

a) Turns yellow
b) Turns green
c) Turns pink
d) Turns red

Answer: b) Turns green

  1. What is the chemical formula for hydrochloric acid?

a) H2SO4
b) HNO3
c) HCl
d) CH3COOH

Answer: c) HCl

  1. Which of the following is a neutral solution?

a) Lemon juice
b) Milk of magnesia
c) Distilled water
d) Vinegar

Answer: c) Distilled water

  1. Which of these substances is used as an antacid?

a) Calcium hydroxide
b) Magnesium hydroxide
c) Sodium hydroxide
d) Potassium hydroxide

Answer: b) Magnesium hydroxide

  1. What happens when an acid reacts with a metal?

a) Salt and hydrogen gas are formed
b) Water and hydrogen gas are formed
c) Base and hydrogen gas are formed
d) Salt and water are formed

Answer: a) Salt and hydrogen gas are formed

  1. What is the main component of vinegar?

a) Citric acid
b) Lactic acid
c) Acetic acid
d) Tartaric acid

Answer: c) Acetic acid

  1. What does a base produce when dissolved in water?

a) Hydrogen ions
b) Hydroxide ions
c) Chloride ions
d) Sulfate ions

Answer: b) Hydroxide ions

  1. Which acid is present in lemons?

a) Acetic acid
b) Formic acid
c) Citric acid
d) Tartaric acid

Answer: c) Citric acid

  1. Which base is used to make soap?

a) Sodium hydroxide
b) Calcium hydroxide
c) Ammonium hydroxide
d) Magnesium hydroxide

Answer: a) Sodium hydroxide

  1. What happens when a base is added to turmeric paper?

a) No change
b) Turns red
c) Turns blue
d) Turns yellow

Answer: b) Turns red

  1. Which acid is found in the stomach?

a) Sulfuric acid
b) Nitric acid
c) Hydrochloric acid
d) Acetic acid

Answer: c) Hydrochloric acid

  1. What does an acid produce when dissolved in water?

a) Hydroxide ions
b) Hydrogen ions
c) Chloride ions
d) Sulfate ions

Answer: b) Hydrogen ions

  1. What is a common property of all acids?

a) Bitter taste
b) Soapy feel
c) Sour taste
d) No taste

Answer: c) Sour taste

  1. What is the chemical nature of soap?

a) Acidic
b) Basic
c) Neutral
d) Salty

Answer: b) Basic

  1. Which acid is found in tamarind?

a) Acetic acid
b) Citric acid
c) Tartaric acid
d) Lactic acid

Answer: c) Tartaric acid

  1. What neutralizes the acidic effect of an ant bite?

a) Lemon juice
b) Vinegar
c) Baking soda
d) Sugar solution

Answer: c) Baking soda

  1. What effect does an acid have on blue litmus paper?

a) Turns red
b) Turns blue
c) Turns yellow
d) No change

Answer: a) Turns red

  1. Which of the following solutions is neutral?

a) Vinegar
b) Lemon juice
c) Milk of magnesia
d) Sugar solution

Answer: d) Sugar solution

  1. Which base is found in milk of magnesia?

a) Sodium hydroxide
b) Ammonium hydroxide
c) Magnesium hydroxide
d) Calcium hydroxide

Answer: c) Magnesium hydroxide

  1. What is the chemical nature of lime water?

a) Acidic
b) Basic
c) Neutral
d) None of the above

Answer: b) Basic

  1. What color does phenolphthalein turn in an acidic solution?

a) Red
b) Blue
c) Pink
d) Colorless

Answer: d) Colorless

  1. Which substance is used to neutralize factory waste before it is disposed of into water bodies?

a) Acid
b) Base
c) Salt
d) Water

Answer: b) Base

  1. Which acid is found in oranges?

a) Acetic acid
b) Formic acid
c) Citric acid
d) Tartaric acid

Answer: c) Citric acid

  1. Which indicator turns red in an acidic solution and blue in a basic solution?

a) Litmus
b) Phenolphthalein
c) Methyl orange
d) Turmeric

Answer: a) Litmus

  1. Which of the following is used to treat basic soil?

a) Quick lime
b) Organic matter (compost)
c) Baking soda
d) Ammonium hydroxide

Answer: b) Organic matter (compost)

  1. Which acid is found in spinach?

a) Acetic acid
b) Formic acid
c) Oxalic acid
d) Tartaric acid

Answer: c) Oxalic acid