Updated on June 13, 2023
by Tiwari Academy
by Tiwari Academy
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
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
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
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
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
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.
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
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
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
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
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.
Q20
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
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
