Five solutions A, B, C, D, and E, when tested with universal indicator, showed pH as $4, 1, 11, 7$ and $9,$ respectively. Which solution is
(i) Neutral?
(ii) Strongly alkaline?
(iii) Strongly acidic?
(iv) Weakly acidic?
(v) Weakly alkaline?
Arrange the pH in increasing order of hydrogen-ion concentration.

Important Questions on Acids, Bases and Salts

EASY

10th Mizoram Board

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS X>Chapter 2 - Acids, Bases and Salts>QUESTIONS>Q 1

You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?

HARD

10th Mizoram Board

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS X>Chapter 2 - Acids, Bases and Salts>QUESTIONS>Q 1

Why should curd and sour substances not be kept in brass and copper vessels?

MEDIUM

10th Mizoram Board

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS X>Chapter 2 - Acids, Bases and Salts>QUESTIONS>Q 2

Which gas is usually liberated when an acid reacts with a metal?

Illustrate with an example. How will you test for the presence of this gas?

MEDIUM

10th Mizoram Board

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS X>Chapter 2 - Acids, Bases and Salts>QUESTIONS>Q 3

Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.

MEDIUM

10th Mizoram Board

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS X>Chapter 2 - Acids, Bases and Salts>QUESTIONS>Q 1

Why do