__________is a substance which is made up of only one kind of atoms.
Atom
Element
Matter
None of these
How many significant figures are there in 1.00 × 106?
3
2
1
0
If ten volumes of hydrogen gas reacts with five volumes of hydrogen gas, how many volume of water vapour would be produced?
10 volumes of H2O
5 volumes of H2O
20 volume of H2O
30 volumes of H2O
At STP, the density of CCl4 vapour in g/L will be nearest to
3.42
6.87
10.26
4.57
ms-2 indicates ___________
Acceleration
Force
Volume
Area
10 g of hydrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be
2 moles
3 moles
4 moles
1 mole
Calculate the number of He atoms in 52g?
7.8386 × 1024
7.82 × 1024
7.828 × 1024
How many grams of dinitrogen gas are required to completely react with 0.3g dihydrogen gas to yield amonia?
1.4g
1.5g
1.6g
1.7g
------------- is the ratio of the density of a substance to the density of a reference substance.
Specific gravity
Molecular wt
Density
Molecular wt of solution
