Advertisements
Advertisements
प्रश्न
The two metals which can be extracted just by heating their sulphides in air are:
(a) sodium and copper
(b) copper and aluminium
(c) potassium and zinc
(d) mercury and copper
उत्तर
(d) mercury and copper
Both mercury and copper are less reactive metals and are placed low in the reactivity series. Hence, they can be extracted by heating their sulphides in air and further reducing their oxides by heating.
APPEARS IN
संबंधित प्रश्न
In the extraction of aluminium: Why is it necessary to replace anodes time to time?
Why does a new aluminium vessel lose shine so soon after use?
Name one ore of aluminium. Name the aluminium compound present in this ore and write its chemical formula.
How is aluminium metal extracted? Explain with the help of an equation.
Name the electrode at which aluminium metal is produced.
An important ore of zinc metal is:
(a) calamine
(b) cuprite
(c) pyrolusite
(d) haematite
Give reasons, why aluminum is used in:
making alloys
Define the following term.
Gangue
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
In extraction of copper, the flux used is ____________.
