Class 7 Science Chapter 4 MCQ (Multiple Choice Questions) of Acids, Bases and Salts. All the important questions from chapter 4 of grade 7 science are given here in the form of MCQs for the preparation of class assessments, school tests and terminal exams. These MCQ Quiz provides a complete practice of the chapter and help to score better in all exams. Questions are taken from intext paragraphs, intext questions and exercises questions of standard 7 science chapter 5 Acids, bases and salts.

Class 7 Science Chapter 5 MCQ for 2025-26

Class: 7Science
Chapter: 5Acids, Bases and Salts
Contents:Multiple Choice Questions MCQ Tests

Class 7 Science Chapter 5 MCQ Tests for 2025-26

Class 7 Science Chapter 5 MCQ tests are given below. There are more than 75 MCQ are given below covering the entire chapter 5 of class 7 science NCERT Book. Practice with these questions after reading NCERT Book to be confident in the concepts of chapter.

Q1

Turmeric is a natural indicator. On adding its paste to acid and base separately, which colours would be observed?

[A]. Yellow in both acid and base.
[B]. Yellow in acid and red in base.
[C]. Pink in acid and yellow in base.
[D]. Red in acid and blue in base.
Q2

Paheli is suffering from indigestion due to acidity. In this situation, she is advisable to take:

[A]. Common salt solution,
[B]. Orange juice,
[C]. Sugar solution,
[D]. None of the above.
Q3

Consider the following sentences and choose the correct statements:

[A]. Tartaric acid present in unripe mangoes.
[B]. Formic acid present in ant sting.
[C]. Lactic acid present in curd.
[D]. All the above.
Q4

Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions respectively are:

[A]. Red and blue
[B]. Blue and red
[C]. Pink and colourless
[D]. Colourless and pink
Q5

Paheli is writing some statements. She wants to know in which of the following statements is or are incorrect?

[A]. Lemon juice and vinegar taste sour because they contain acid.
[B]. Turmeric and litmus are natural acid base indicator.
[C]. Indicator phenolphthalein gives yellow colour with lime water.
[D]. None of the above.
Q6

Boojho is writing some statements, choose the correct statement and help him:

[A]. Heat is responsible for increase in temperature during a neutralization reaction.
[B]. Turmeric is a natural indicator and gives pink colour in basic solution.
[C]. Acids are good conductors of electricity; as they allow the passage of electric current through them.
[D]. All the above.
Q7

When the soil is too basic, plants do not grow well in it. To improve its quality, what must be added to the soil?

[A]. Organic matter
[B]. Quick lime
[C]. Slaked lime
[D]. Calamine solution
Q8

Consider the following statement and choose the correct option(s):

[A]. Our stomach contains hydrochloric acid.
[B]. Hydrochloric acid (HCL) helps us to digest food.
[C]. We take milk of magnesia in in digestion.
[D]. All of the above.
Q9

Boojho appeared in class test where he wrote some statements but he confused to know the correct statement. Would you help him to know that?

[A]. Ants have formic acid in their sting, that is why stinging of ants become painful.
[B]. Getting relief from ant sting by rubbing baking soda.
[C]. Heat always evolves in neutralization, salt and water are also formed in neutralization.
[D]. All of the above.
Q10

Mohan is writing some statements about bases, choose the correct statements and help him:

[A]. They have bitter taste and soapy touch.
[B]. Strong bases like sodium hydroxide are corrosive in nature.
[C]. They react with acids to neutralize them and are hence called antacids.
[D]. All the above.
Q11

Neutralization reaction is a:

[A]. Physical and reversible change.
[B]. Physical change that cannot be reversed.
[C]. Chemical and reversible change.
[D]. Chemical change that cannot be reversed.
Q12

Pritam is writing some statements about bases, choose the correct statements and help him:

[A]. Tooth decay is caused by the presence of a base.
[B]. Indicator is a substance which shows different color in acidic and basic solution.
[C]. Sodium Hydroxide turns blue Litmus red.
[D]. All the above.
Q13

Consider the following statements, choose the correct one:

[A]. Both acids and bases change colour of all indicators.
[B]. If an indicator gives a colour change with an acid it does not give a change with a base.
[C]. If an indicator changes colour with a base but does not change colour with an acid.
[D]. Change of colour in an acid and a base depends on the type of indicators.
Q14

Boojho is writing some statements about indicators. In which of the following statements is or are incorrect? Help him.

[A]. An indicator tells us whether the substance we are testing is an acid or a base by change in its colour.
[B]. Litmus, china rose and turmeric are naturally occurring indicators.
[C]. Phenolphthalein is a synthetic indicator.
[D]. When litmus is added to a basic solution it turns red.
Q15

Consider the following statements and choose the incorrect statement(s):

[A]. China rose indicator is a light pink coloured solution which is extracted from the red flowers of china rose plant with water.
[B]. Acid turns china rose indicator to magenta (deep pink).
[C]. Bases turn china rose indicator to blue.
[D]. If a drop of the given solution turns china rose indicator from light pink to green, then the given solution will be basic in nature.
Q16

Which of the following sets of substances contains acids?

[A]. Grapes, lime water
[B]. Vinegar, soap
[C]. Curd, milk of magnesia
[D]. Curd, vinegar
Q17

Paheli is writing some statements. She wants to know in which of the following statements is or are incorrect?

[A]. Phenolphthalein indicator is natural acid base indicator.
[B]. Phenolphthalein indicator is colourless in acid solution.
[C]. Phenolphthalein indicator is gives pink colour in basic solution.
[D]. The substance whose solution do not change the colour of any indicator, called neutral substances.
Q18

Which of the following statement is or are correct?

[A]. Ascorbic acid is present in amla and citrus fruit (lemon and oranges).
[B]. Tartaric acid is present in tamarind, unripe grapes and unripe mangoes.
[C]. Oxalic acid is present in spinach (palak).
[D]. All the above.
Q19

Paheli is writing some statement, which is given by her teacher. Would you help him to choose the incorrect statements?

[A]. Minerals acid are also known as laboratory acids.
[B]. Baking powder used in making cakes and biscuit contains tartaric acid.
[C]. Carbonic acid is used in fizzy soft drink and soda water.
[D]. Nitric acid, hydrochloric acid and acetic acid are example of strong acids.
Q20

Consider the following statements and choose the incorrect one:

[A]. Sodium hydroxide and potassium hydroxide are found in soap.
[B]. Calcium hydroxide is found in lime water.
[C]. Magnesium hydroxide is found in milk of magnesia.
[D]. Sodium hydroxide or ammonia solution is found in window cleaners.
Q21

Boojho appeared in class test where he wrote some statements but he confused to know the incorrect statement. Would you help him to know that?

[A]. Sodium Hydroxide is commonly known as caustic soda.
[B]. Potassium Hydroxide is commonly known as caustic potash.
[C]. A base which is soluble in water is called an alkali.
[D]. Sodium and potassium hydroxide are weak bases but handled very carefully.
Q22

Which of the following is an acid base indicator?

[A]. Vinegar
[B]. Lime water
[C]. Turmeric
[D]. Baking soda
Q23

Boojho and Paheli went to a soda shop and took soda for drink. Boojho wants to know that which of the base is safe to drink?

[A]. Calcium hydroxide
[B]. Ammonium hydroxide
[C]. Sodium carbonate
[D]. Magnesium hydroxide
Q24

Products of a neutralization reaction are always:

[A]. An acid and a base
[B]. An acid and a salt
[C]. A salt and water
[D]. A salt and a base
Q25

In which of the following statements is or are incorrect?

[A]. To cure indigestion and get rid of pain, we can take bases called antacids.
[B]. Antacids are a group of mild bases but have toxic effects on the body.
[C]. Magnesium oxide is common antacid used for curing indigestion.
[D]. Baking soda is also used as antacid.

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Last Edited: June 13, 2023