Assertion (A): Metals low in the reactivity series are very unreactive. The oxides of these metals can be reduced to metals by heating alone. Reason (R): Cinnabar when heated in air first gets converted into mercuric oxide which is then reduced to mercury on further heating.

Extraction of Metals Low in Activity Series, Roasting of Sulphide Ores | PadhAiPro

Question

Assertion-ReasonExtraction of Metals Low in Activity SeriesRoasting of Sulphide OresCBSE PYQ

Similar Questions

Name the ore of mercury and state the form in which it is found in nature. Write the chemical equations along with the condition required for the reactions involved in the extraction of mercury from its ore.

TextMinerals and OresExtraction of Metals Low in Activity SeriesRoasting of Sulphide Ores

Assertion (A) : The extraction of metals from their sulphide ores cannot take place without roasting of the ore. Reason (R) : Roasting converts sulphide ores directly into metals.

Assertion-ReasonExtraction of Metals Based on ReactivityRoasting of Sulphide Ores

Assertion (A) : Metals in the middle of activity series are found in nature as sulphides or carbonates. Reason (R) : The sulphide ores are calcinated whereas carbonate ores are roasted to extract metals from them.

Assertion-ReasonExtraction of Metals in Middle of Activity SeriesRoasting of Sulphide OresCalcination of Carbonate Ores

A metallurgist heats zinc sulphide in the presence of excess air and notices a white solid forming along with a gas that smells like a burning matchstick.

CASE_STUDIESExtraction of Metals in Middle of Activity SeriesRoasting of Sulphide Ores

With the help of suitable chemical equations, list the two main differences between roasting and calcination. How is metal reduced from the product obtained after roasting/calcination of the ore ? Write the chemical equation for the reaction involved.

TextRoasting of Sulphide OresCalcination of Carbonate OresReduction of Metal Oxides Using Carbon

On the basis of reactivity metals are grouped into three categories – (i) Metals of low reactivity (ii) Metals of medium reactivity (iii) Metals of high reactivity Therefore metals are extracted in pure form from their ores on the basis of their chemical properties. Metals of high reactivity are extracted from their ores by electrolysis of the molten ore. Metals of low reactivity are extracted from their sulphide ores, which are converted into their oxides. The oxides of these metals are reduced to metals by simple heating.

CASE_STUDIESExtraction of Metals Based on ReactivityExtraction of Metals Low in Activity SeriesExtraction of Metals High in Activity Series