Class 7 Science Chapter 5 MCQ (Multiple Choice Questions) of Acids, Bases and Salts. All the important questions from chapter 5 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 2022-2023

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

Class 7 Science Chapter 5 MCQ Tests for 2022-23

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

Which of the following statement(s) is or are correct?

[A]. Lemon water is basic in nature.
[B]. A compound if acidic will turn all indicators red.
[C]. Common salt dissolved in water turns blue litmus red.
[D]. None of the above.
Q2

Consider the following statements, choose the incorrect one:

[A]. Calamine can be used to treat ant’s sting.
[B]. Lime water turns red litmus blue.
[C]. Phenolphthalein is a natural indicator.
[D]. None of the above.
Q3

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.
Q4

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.
Q5

Consider the following statements, choose the incorrect one:

[A]. When an acidic solution is mixed with a basic solution, they neutralize each other, forming salt and water.
[B]. Neutral is the solution which does not change the colour of either red or blue Litmus.
[C]. Phenolphthalein gives pink colour in base type of solution.
[D]. Red litmus gives blue colour in lemon juice.
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

A farmer was unhappy because of his low crop yield. He discussed the problem with an agricultural scientist realised that the soil of his field was either too acidic or two basics. What remedy would you suggest?

[A]. It can be treated with quicklime (calcium oxide) base.
[B]. It can be treated with slaked lime (calcium hydroxide) base.
[C]. It can be treated with organic matter (manure or compost).
[D]. All the above.
Q8

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

[A]. ubstances which are neither acidic not basic are said to be neutral.
[B]. Litmus and turmeric are natural indicators.
[C]. An acid and a base neutralise each other to form a salt.
[D]. All the above.
Q9

“Litmus” natural dye in an extract of which of the following:

[A]. China rose (gudhal)
[B]. Beetroot
[C]. Lichen
[D]. Blueberries Jamun
Q10

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

[A]. They have a sour taste.
[B]. They are corrosive in nature if it falls on the skin, it can cause burns.
[C]. They are good conductors of electricity, as they allow the passage of electric current through them.
[D]. All the above.
Q11

In which of the following statement is or are correct?

[A]. Indigestion is neutralized by taking an antacid like milk of magnesia.
[B]. The effect of and sting is neutralized by rubbing most baking soda.
[C]. Soil can be treated with quicklime when soil is too acidic.
[D]. All the above.
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

A solution changes the colour of turmeric indicator from yellow to red. The solution is:

[A]. Basic
[B]. Acidic
[C]. Neutral
[D]. None of these.
Q15

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.
Q16

Consider the following statements, choose the incorrect one:

[A]. Acetic acid is found in vinegar.
[B]. Formic acid is present in ant’s sting.
[C]. Citric acid is present in tamarind.
[D]. Lactic acid is present in curd and in milk.
Q17

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.
Q18

On adding phenolphthalein indicator to a colourless solution, no change is observed. What is the nature of this solution?

[A]. Basic
[B]. Either acidic or basic
[C]. Either acidic or neutral
[D]. Basic or neutral
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

Which of the following is an acid base indicator?

[A]. Vinegar
[B]. Lime water
[C]. Turmeric
[D]. Baking soda
Q22

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
Q23

Consider the following statements, choose the incorrect one:

[A]. When an acidic solution is mixed with a basic solution, they neutralize each other, forming salt and water.
[B]. Neutral is the solution which does not change the colour of either red or blue litmus.
[C]. Phenolphthalein gives pink colour in base type of solution.
[D]. Red litmus gives blue colour in lemon juice.
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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