Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as:

In calcination, ore is heated strongly in the absence of air

Assertion: Durig calcination the ore is heated well below its melting point in the limited supply of air or absence of air. Reason: The process of calcination is carried out for sulphide ores.

Roasting is a process in which the ore (mostly sulphide) is heated strongly in the presence of excess of air. The heating should be done at a temperature below the melting point of the ore. Select of correct statement :

Roasting is a process in which the ore (mostly sulphide) is heated strongly in the presence of excess of air. The heating should be done at a temperature below the melting point of the ore. 2PbS + 3O_(2) rarr A + 2SO_(2) The name of A is.

Roasting is a process in which the ore (mostly sulphide) is heated strongly in the presence of excess of air. The heating should be done at a temperature below the melting point of the ore. Sometimes roasting may not bring about complete oxidation : 2CuFeS_(2) + 4O_(2) rarr A + 2FeO + 3SO_(2) Find the A :

If heat a supplied to a solid, its temperature

The melting points of most of the solid substances increases with an increase of pressure acting on them However, ice melts at a temperature lower than its usual melting point, when the pressure increases. This is Because :

Heating of ore in presence of air to remove sulphure impurities is called

The process of heating the ore strongly in excess of air so that the volatile impurities are removed and the ore is changed to oxide is known as

The diagram below shows the change of phases of a substance on a temperature vs time graph on heating the substance at a constant rate. What is the boiling and melting point of the substance ?