Lavoisier classified the elements in the year :
1780
1782
1990
1789
Newland's classification of elements is termed as :
Triad
Law of octaves
Periodicity
Coinage
Sulphur reacts with hydrogen to give hydrogen sulphide. The odour of hydrogen sulphide is :
Fishy
Pleasant
Rotten egg
Strawberry
When did Lothar mayer classified the elements ?
1860
1862
1864
1868
Bronze is formed by the combination of :
Copper and silver
Copper and tin
Silver and tin
Silver and gold
Among the following which one is a inert gas ?
Neon
O2
a and d
Argon
Which is the lightest metal ?
Lithium
Osmium
Bromine
Silver
Complete : 4 Al + 3 O2 → ?
4 Al3O2
4 AlO3
2 Al2O3
2 Al3O2
What is the melting point of Gallium ?
980 C
200 C
29.80 C
28.90 C
Among metals which is the only conductor of electricity ?
Carbon
Graphite
Sulphur
