Class 7 Science Chapter 5 MCQ

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 2021-2022

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

Class 7 Science Chapter 5 MCQ Tests for 2021-22

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

The correct way of making a solution of acid in water is to:

[A]. Add water to acid.
[B]. Add acid to water.
[C]. Mix acid and water simultaneously.
[D]. Add water to acid in a shallow container.
Q3

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.
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

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




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

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.
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

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.



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

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.
Q13

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.
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

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.
Q19

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
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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