How many significant figures are there in 1.00 × 106?
3
2
1
0
A solution is prepared by adding 2g of a substance A to 18g of water. Calculate the mass percent of the water. Calculate the mass percent of the solute?
100%
98%
25%
10%
The density of 3m solution of Nacl is 1.25g ml-1 calculate molarity of the solution.
2.10 mol/kg
3.7 mol/kg
2.79 mol/kg
2.9 mol/kg
Calculate the amount of carbon dioxide that could be produced when 1 mole of carbon is burnt in air.
44g
43g
40g
38g
Calculate the amount of water (g) produced by the combustion of 16g of methane.
36g
32g
28g
20g
The height of a person is 155.01 cm.What is the least count of the scale used?
1.0
0.01
0.001
__________ defined as mass of 1 mole of molecules of an element.
Molar volume
Molar molecular mass
Molar volume of gas
Molar volume of liquid
___________ is defined as the number of atoms present in a molecule.
Atom
Atomicity
Molarity
Molecule
What is the SI unit of mass?
kg
mg
lg
cm3
Which of the following is an example of extensive property?
Viscosity
Volume
Pressure
Density
