MEDIUM
7th Punjab Board
IMPORTANT
Earn 100

Explain why factory waste is neutralized before disposing it into the water bodies.

Important Questions on Acids, Bases and Salts

HARD
7th Punjab Board
IMPORTANT
Science>Chapter 5 - Acids, Bases and Salts>Exercises>Q 9
Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and the third is a sugar solution. How will you identify them? You have only turmeric indicator.
MEDIUM
7th Punjab Board
IMPORTANT
Science>Chapter 5 - Acids, Bases and Salts>Exercises>Q 10
Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain.
MEDIUM
7th Punjab Board
IMPORTANT
Science>Chapter 5 - Acids, Bases and Salts>Exercises>Q 11
Consider the following statements:
(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, it does not change colour with an acid.
(D) Change of colour in an acid and a base depends on the type of the indicator.
Which of these statements are correct?