Updated by Tiwari Academy
on June 13, 2023, 10:47 AM
on June 13, 2023, 10:47 AM
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 2024-25
| Class: 7 | Science |
| Chapter: 5 | Acids, Bases and Salts |
| Contents: | Multiple Choice Questions MCQ Tests |
Class 7 Science Chapter 5 MCQ Tests for 2024-25
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
Boojho wants to know different colours in different solutions with the help of red litmus paper. Consider the following sentences and choose the correct one and help him:
[A]. Milk in water shows no change.
[B]. Baking powder in water turns blue.
[C]. Blue vinegar in water source no change.
[D]. All 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
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
“Litmus” natural dye in an extract of which of the following:
[A]. China rose (gudhal)
[B]. Beetroot
[C]. Lichen
[D]. Blueberries Jamun
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 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
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
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
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
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
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.
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
