MEDIUM
7th CBSE
IMPORTANT
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When dilute sulphuric acid is added to lime water, will the reaction mixture be hot or cool?

Important Questions on Acids, Bases and Salts

MEDIUM
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 5 - Acids, Bases and Salts>Exercise 5.3>Q II
How will you test whether a given solution is acidic, basic or neutral with a turmeric indicator?
MEDIUM
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 5 - Acids, Bases and Salts>Exercise 5.3>Q III
While playing in a park, a child was stung by a “wasp”. Some suggested for applying a paste of baking soda and others suggested lemon juice as a remedy. Which remedy do you think is appropriate?
MEDIUM
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 5 - Acids, Bases and Salts>Exercise 5.3>Q III
Why does a pink colour appear upon gradually adding sodium hydroxide to a solution of acid having 2-3 drops of phenolphthalein?
HARD
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 5 - Acids, Bases and Salts>Exercise 5.3>Q IV
With the help of an activity, determine the nature of the given solution (basic, acidic or neutral) using litmus paper.
MEDIUM
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 5 - Acids, Bases and Salts>HOTS AND VALUE BASED QUESTIONS>Q 1
If you get a turmeric stain on your clothes while eating food and try to wash it with soap, the stain becomes red. Why?
MEDIUM
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 5 - Acids, Bases and Salts>HOTS AND VALUE BASED QUESTIONS>Q 2
Why do farmers need to treat the soil of their fields with slaked lime before sowing the seeds?
MEDIUM
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 5 - Acids, Bases and Salts>HOTS AND VALUE BASED QUESTIONS>Q 3
Three liquids are given to you. One is Hydrochloric acid another is sodium hydroxide and third is a sugar solution. How will you identify them? You have China rose as an indicator to use.
MEDIUM
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 5 - Acids, Bases and Salts>HOTS AND VALUE BASED QUESTIONS>Q 4
Recent news in TV’s and newspapers stirred up the entire nation, where a college-going girl was attacked with acid and developed severe burn injuries leading to deformity of her face. Sunita, a class 9 student, understanding the need of the hour, gathered a few of her friends and started spreading awareness, and many joined her in this rare good cause: Which qualities does Sunita possess? List the characteristics of acids.