1.
Analysis of chlorophyll shows that it contains 2.68 percent magnesium. How many atoms of magnesium does 100 g of chlorophyll contain ?
2.
What will be the volume in litres of 20 g of hydrogen gas at STP?
3.
Read the Question given below
4.
The percentage of Nitrogen in urea is about - (N = 14, H = 1, C = 12, O = 16)
5.
The number of molecules in one litre of water is equal to
6.
At normal temperature and pressure (NTP) what amount of manganese dioxide react with hydrochloric acid so that 100 litres of chlorine gas is obtained? (Mn = 55, O = 16, Cl = 35.5, H =1)
7.
Read the Question given below
8.
The total number of atoms in a molecule of aluminium oxide is -
9.
Read the Question given below
10.
96 grams of Magnesium on complete burning with oxygen gives -
