Write the pH of gastric juice.

Important Questions on Acids, Bases and Salts

MEDIUM

10th ICSE

IMPORTANT

Science Chemistry>Chapter 2 - Acids, Bases and Salts>ASSESSMENT>Q 7

What do you observe, on adding dilute hydrochloric acid to sodium bicarbonate placed in a test tube?

MEDIUM

10th ICSE

IMPORTANT

Science Chemistry>Chapter 2 - Acids, Bases and Salts>ASSESSMENT>Q 7

What do you observe, on adding dilute hydrochloric acid to zinc metal kept in a test tube?

HARD

10th ICSE

IMPORTANT

Science Chemistry>Chapter 2 - Acids, Bases and Salts>ASSESSMENT>Q 8

Crystals of a substance changed their colour on heating in a closed test tube but regained it after some time when they were allowed to cool down. Name the substance and write its formula and explain the phenomenon involved.

MEDIUM

10th ICSE

IMPORTANT

Science Chemistry>Chapter 2 - Acids, Bases and Salts>ASSESSMENT>Q 9

A metal X when added to the test tube containing dilute sulphuric acid produces gas Y which burns with a pop sound. Identify X and Y. Give your answer with a chemical equation.

MEDIUM

10th ICSE

IMPORTANT

Science Chemistry>Chapter 2 - Acids, Bases and Salts>ASSESSMENT>Q 10

Effervescences are formed when the batter for the cake is heated. Which substance is present in the batter? Name the gas evolved. Write the chemical equation involved.

MEDIUM

10th ICSE

IMPORTANT

Science Chemistry>Chapter 2 - Acids, Bases and Salts>ASSESSMENT>Q 11

A metal compound X which is a black oxide when reacts with $\mathrm{HCl}$ turns to a bluish-green compound Y. Identify X and Y.

HARD

10th ICSE

IMPORTANT

Science Chemistry>Chapter 2 - Acids, Bases and Salts>ASSESSMENT>Q 12

A metal X reacts with dilute $\mathrm{HCl}$ to produce effervescence. The gas evolved extinguishes a burning candle and turns lime water milky. Identify the gas evolved. If excess gas is passed through lime water, milkiness disappears, the solution becomes clear and forms compound Y. Identify X and Y. Give your answer with a balanced chemical equation.

EASY

10th ICSE

IMPORTANT

Science Chemistry>Chapter 2 - Acids, Bases and Salts>ASSESSMENT>Q 13

Is $\mathrm{HCl}$ is a strong or weak acid.