________________ consist of only one kind of atoms.
Molecule
Compound
Elements
Atoms
Calculate the molecular mass of H2O
14u
16u
18u
22u
Gram atom is defined as atomic weight expressed in grams. H contains ______________ atom.
6.022 × 1023 atom
6.22 ×1023 atom
6.20 × 1023 atom
6.02 × 1023 atom
Unit of power is
Watt
∫
Mol
H2
How many different elements are known to exist?
140
160
110
115
Which of the following is an example of extensive property?
Viscosity
Volume
Pressure
Density
Name the process used for refining of petroleum?
Fractional distillation
Distillation
Purification
None of these
" Equal volumes of all gases under similar conditions of temperature and pressure, contains equal number of molecules"
Law of Reciprocal proportion
Gay Lussac's Law combining volumes
Avogadro's law
How many significant figures are present in 0.0048
2
3
4
5
