Among the following which is a coinage metal ?
Copper
Nickel
Silver
a and c
Who was the person who grouped three elements and termed as triad ?
Lavoisier
Dobereiner
Mendeleev
Newland
Which is the heaviest metal ?
Osmium
Lithium
Tungsten
Gold
By whom the elements are classified into metals and non-metals ?
Among the following which one is a inert gas ?
Neon
O2
a and d
Argon
In modern periodic law, all the elements are sorted in the periodic function of their :
Atomic number
Atomic mass
Ionic number
Mass number
Complete : 4 Al + 3 O2 → ?
4 Al3O2
4 AlO3
2 Al2O3
2 Al3O2
Among metals which is the only conductor of electricity ?
Carbon
Bromine
Graphite
Sulphur
Sulphur reacts with hydrogen to give hydrogen sulphide. The odour of hydrogen sulphide is :
Fishy
Pleasant
Rotten egg
Strawberry
Among metals which is the best conductor of electricity ?
Platinum
Rubidium