MEDIUM
9th ICSE
IMPORTANT
Earn 100

Complete and balance the following reaction:

Fe +HCl → _____ + _____

Important Questions on Study of the First Elements-Hydrogen

HARD
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(C)>Q 12
Complete and balance the following reaction:

Zn + NaOH → _____ + _____

HARD
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(C)>Q 12

Complete and balance the following reaction:

Al + KOH + H2O →_____ + _____

MEDIUM
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(C)>Q 13
If iron filings and steam are kept in closed vessels at 400°C, what would happen to them?
MEDIUM
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(C)>Q 13
If hydrogen and magnetic oxide of iron are kept in closed vessels at over 400°C, what would happen to them?
MEDIUM
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(C)>Q 14
A metal in the powdered form reacts very slowly with boiling water, but it decomposes with steam. Name the metal.
MEDIUM
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(C)>Q 14

Write the balanced equation for the reaction of the magnesium with boiling water and steam.

MEDIUM
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(C)>Q 15
What do you observe when hydrogen gas is passed through soap solution?
MEDIUM
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(C)>Q 16
Under what condition hydrogen be made to combine with nitrogen? Name the product and write the equation.