Advertisements
Advertisements
प्रश्न
Explain concept with example/explain with the help of a balanced equation.
Calcination
Advertisements
उत्तर
- The process of heating carbonate ores in limited air to convert it into respective oxide is called calcination.
- For example, zinc carbonate is heated strongly in a limited supply of air to convert it to zinc oxide.
\[\ce{\underset{\text{Zinc carbonate}}{ZnCO_{3(s)}} ->[Heat] \underset{\text{Zinc oxide}}{ZnO_{(s)}} + \underset{\text{Carbon dioxide}}{CO_2\uparrow}}\]
APPEARS IN
संबंधित प्रश्न
Write the composition of the alloy called bronze.
Why do gold ornaments look new even after several years of use?
Explain giving one example, how highly reactive metals (which are high up in the reactivity series) are extracted.
Name two ores of zinc. Write the names of the chemical compounds present in them and give their chemical formulae.
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
Which metal can be extracted from the following ore?
Haematite
Give the principles of the froth floatation process.
Give reasons, why aluminum is used in:
painting electric and telegraphic poles
Aluminum is used in thermite welding:
what is ignition mixture?
Define the term:
Flux
Complete the incomplete statement with missing word:
Metals form positive ions while non- metals ______.
How many valence electrons are present in metals ?
Name a non- metal that has a metallic luster and sublimes on heating.
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
Froth floatation process is generally used to concentrate ______ ores.
Zinc sulphide : Roasting : : zinc carbonate : _______
In the electrolytic reduction of alumina, the lining of graphite acts as an anode.
Explain Bayer’s process.
Explain the following reaction with the balanced equation.
Zinc sulphide is heated strongly in excess of air
Care must be taken while diluting concentrated nitric acid with water. Why?
