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

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.
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

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
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

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

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.
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

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

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.
Q13

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.
Q14

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.
Q15

Boojho is writing about turmeric indicator as turmeric is natural indicator and more details. Choose the correct statements written by him:

[A]. Turmeric turns red in basic solution.
[B]. Turmeric paper is yellow in acid solution.
[C]. Bases turn the yellow turmeric paper to red.
[D]. All the above.



Q16

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.
Q17

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.
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 correct 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

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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