What is the atomicity of hydrogen?

Important Questions on Study of First Element - Hydrogen

EASY

9th ICSE

IMPORTANT

TOGETHER WITH CHEMISTRY>Chapter 6 - Study of First Element - Hydrogen>PRACTICE QUESTIONS>Q 2

In free state, where hydrogen occurs? Why does it rarely occur in free state?

HARD

9th ICSE

IMPORTANT

TOGETHER WITH CHEMISTRY>Chapter 6 - Study of First Element - Hydrogen>PRACTICE QUESTIONS>Q 3

Name two metals which react both with acids and alkalis to liberate hydrogen. Support your answer with balanced chemical equations.

EASY

9th ICSE

IMPORTANT

TOGETHER WITH CHEMISTRY>Chapter 6 - Study of First Element - Hydrogen>PRACTICE QUESTIONS>Q 4

Give reasons why during the laboratory preparation of hydrogen no flame should be kept near the apparatus.

EASY

9th ICSE

IMPORTANT

TOGETHER WITH CHEMISTRY>Chapter 6 - Study of First Element - Hydrogen>PRACTICE QUESTIONS>Q 4

Give reasons why hydrogen is not collected in air but is collected over water.

EASY

9th ICSE

IMPORTANT

TOGETHER WITH CHEMISTRY>Chapter 6 - Study of First Element - Hydrogen>PRACTICE QUESTIONS>Q 4

Give reasons why hydrogen obtained from granulated zinc has a peculiar smell.

MEDIUM

9th ICSE

IMPORTANT

TOGETHER WITH CHEMISTRY>Chapter 6 - Study of First Element - Hydrogen>PRACTICE QUESTIONS>Q 4

Give reasons why colour of ferric chloride changes when it comes in contact with zinc and dilute hydrochloric acid.

EASY

9th ICSE

IMPORTANT

TOGETHER WITH CHEMISTRY>Chapter 6 - Study of First Element - Hydrogen>PRACTICE QUESTIONS>Q 4

Give reasons why lead is not used for the preparation of hydrogen from dilute hydrochloric acid or dilute sulphuric acid.

MEDIUM

9th ICSE

IMPORTANT

TOGETHER WITH CHEMISTRY>Chapter 6 - Study of First Element - Hydrogen>PRACTICE QUESTIONS>Q 5

Name the process by which hydrogen is manufactured. Give all details of the process.