NCERT Solutions Class 7th Science Chapter – 4 Acids, Bases and Salts MCQ

NCERT Solutions Class 7th Science Chapter – 4 Acids, Bases and Salts

TextbookNCERT
Class 7th
Subject Science
Chapter4th
Chapter NameAcids, Bases and Salts
CategoryClass 7th Science MCQ
Medium English
SourceLast Doubt
NCERT Solutions Class 7th Science Chapter – 4 Acids, Bases and Salts MCQ What is the reaction of acid base?, What is acid reaction with example?, What reaction is acid-base?, What are the 4 types of acid reactions?, What is the pH value of strong base?, Which pH is most acidic?, What are the 3 types of acids?, What is the formula of acids?, What does pH stand for?, What are the uses of acid?, How do you name salts?, What do acids have?, What is the SI unit of pH?, What has a pH of 1?, What acid is in blood?, Can pH be negative?, What is pH in food?, Why is pH important?, What’s the pH of milk?, How to calculate pH?, What is pH in water?, What pH is soil?, What is the pH of soap?, What is the pH of Coca Cola?, What is the pH of tea?, What is the pH of toothpaste?, Is soap an acid Will read about etc.

NCERT Solutions Class 7th Science Chapter – 4 Acids, Bases and Salts

Chapter – 4

Acids, Bases and Salts

MCQ

(1) Which Of The Following Statement (S) Is Or Are incorrect ?

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. All of the above.

Answer – (D) All of the above
(2) 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.

Answer – (D) All the above.
(3) 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.

Answer – (D) All the above.
(4) 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.

Answer – (D) All the above.
(5) 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.

Answer – (D) When litmus is added to a basic solution it turns red.
(6) 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.

Answer – (D) All the above.
(7) Which Of The Following Sets Of Substances Contains Acids?

A. Grapes, lime water
B. Vinegar, soap
C. Curd, milk of magnesia
D. Curd, vinegarcorrect

Answer – (D) Curd, vinegar
(8) 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.

Answer – (D) All the above.
(9) 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

Answer – (D) Magnesium hydroxide
(10) 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

Answer – (C) A salt and water

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