The size of which increases as it moves towards the sun.
meteor
orbit
planet
comet
Metals are seperated from
Ore
Compounds
Minerals
Metallic oxides
Most metals burn in air. What do they form ? What is the nature of the resultant?
metal oxides which are acidic
metal hydroxides which are basic
metal oxides which are basic
metal hydroxides which are acidic
From the below statements which is wrong one
Froth floatation is used for the concentration of sulphide ores
Calcination is used to remove the impurity from CaCO3
Powdered ore is strongly heated. This process is roasting.
From Magnetic nature of ore impurity is removed using magnetic roller.
For removing the impurity SiO2 which is used as flux?
CaO
FeO
CO2
NO
Which of the following metals cannot be obtained by reduction of their oxides by aluminium?
Mg
Cr
Cu
Fe
The flux CaO is used to remove gang.This is getting from
CaCO3
CO
Ca(OH)2
boron
The metal getting from blast furnace is
Steel
Medium steel
Pig iron
Mild steel
Which of the following gas is evolved when dilute mineral acids are treated with metal hydrogen carbonates?
H2
O2
