4 P + 502 ----------> _________.
Phosphorous Oxygen
P3O5
2P2
2P2O5
P2O5
Gold is used in _________________.
Thermometer
Fuel
Jewellery
Machinery
Name the most abundant metal in the earth's crust_________ .
Silver
Copper
Aluminium
Oxygen
Copper sulphate (CuSO4) possesses.
Red color
Blue color
Green color
Yellow
The use of tungsten in electric bulb is based on the fact that:
Tungsten is sonorous.
Tungsten is a metal.
Tungsten has a high tensile strength.
Tungsten has a high density.
On burning, ................ reacts with oxygen to produce metal oxides that are .................. in nature. The information in which row completes the given statement?
Metals, acidic
Non-metals, acidic
Metals, basic
Non-metals, basic
Which one of the following metal is always stored under kerosene?
Sodium
Magnesium
"Platinum , silver, gold are normally occurs in nature ___________"
In free state
As sulphare ore
As sulphide ore
As carbonate ore
A mixture of copper and zinc is called
Brass
Bronze
Solder
Steel
Which two of these elements are metals?
I. Iodine
II. Aluminium
III. Zinc
IV. Carbon
I and II
II and III
III and IV
IV and I