MEDIUM
9th ICSE
IMPORTANT
Earn 100

A piece of calcium is dropped in water. Write an equation for the reaction that takes place.

Important Questions on Study of the First Group Element Hydrogen

MEDIUM
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 7 - Study of the First Group Element Hydrogen>Questions>Q 11
Write balanced equation of the reaction in the preparation of hydrogen from a solution of potassium hydroxide (other than by electrolysis).
HARD
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 7 - Study of the First Group Element Hydrogen>Questions>Q 11
Describe briefly with equations the Bosch Process for the large scale production of hydrogen.
MEDIUM
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 7 - Study of the First Group Element Hydrogen>Questions>Q 11

Account for the following facts:

Though lead is above hydrogen in the activity series, it does not react with dil. hydrochloric acid or dil. sulphuric acid.

MEDIUM
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 7 - Study of the First Group Element Hydrogen>Questions>Q 11

Account for the following facts:

Potassium and sodium are not used to react with dil. hydrochloric acid or dil. sulphuric acid in the laboratory preparation of hydrogen.

MEDIUM
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 7 - Study of the First Group Element Hydrogen>Questions>Q 12
Place the metals calcium, iron, magnesium and sodium in order of their activity with water, placing the most active first. Write the equation for each of the above metals which react with water.
MEDIUM
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 7 - Study of the First Group Element Hydrogen>Questions>Q 12
Why is copper not used to prepare hydrogen by the action of dil. hydrochloric acid or dil. sulphuric acid on the metal?
MEDIUM
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 7 - Study of the First Group Element Hydrogen>Questions>Q 13
Comment on the dual position of hydrogen in the periodic table.
MEDIUM
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 7 - Study of the First Group Element Hydrogen>Questions>Q 14
Hydrogen can be prepared with zinc by using acid. Give an equation in this case.