HARD
9th ICSE
IMPORTANT
Earn 100

Calculate the relative molecular mass of the H2SO4.

Important Questions on The Language of Chemistry

HARD
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 1 - The Language of Chemistry>CHAPTER EXERCISE>Q 27
Calculate the relative molecular mass of NH42SO4.
HARD
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 1 - The Language of Chemistry>CHAPTER EXERCISE>Q 28

Calculate the percentage composition of various elements in Na2CO3.
[Given that, the relative atomic masses of O=16, Na=23, C=12].

EASY
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 1 - The Language of Chemistry>CHALLENGERS*>Q 1
The formula of oxide of an element Z is Z2O3. What is the valency of element Z and oxygen?
MEDIUM
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 1 - The Language of Chemistry>CHALLENGERS*>Q 2
The element B shows valencies of 4 and 6. The formulae of its two oxides respectively are 
MEDIUM
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 1 - The Language of Chemistry>CHALLENGERS*>Q 3
The formula of the sulphate of an element X is X2(SO4)3. The formula of nitride of the element X is 
HARD
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 1 - The Language of Chemistry>CHALLENGERS*>Q 4
"Hydrogen sulphide gas burns in air to given water and sulphur dioxide". The balanced equation for this reaction is 
MEDIUM
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 1 - The Language of Chemistry>CHALLENGERS*>Q 5

Some compounds along with their chemical formulae are given below.

Compounds Chemical Formulae
Magnesium nitrate  Mg(NO3)2
Aluminium nitride AlN
Zinc phosphate Zn3(PO4)2
Calcium oxide CaO

On the basis of formulae given above, the valencies or charges on ions are given below. Select the incorrect option.

HARD
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 1 - The Language of Chemistry>CHALLENGERS*>Q 6

Consider the following reaction,

X calcium carbonate + Y phosphoric acid → Calcium phosphate + X water + X carbon dioxide.

What is the value of X and Y?