Which reaction is not possible for calcinatio | vedclass

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Question

(C) Calcination is a process of heating an ore in a limited supply of air or in the absence of air to remove volatile impurities or water of hydration

Vedclass · Accepted Answer

$PbS 	o PbSO_4$

Vedclass · Answer

(C) Calcination is a process of heating an ore in a limited supply of air or in the absence of air to remove volatile impurities or water of hydration,or to decompose carbonates into oxides.$PbCO_3 	o PbO + CO_2$ is a calcination reaction.$Fe_2O_3 \cdot 3H_2O 	o Fe_2O_3 + 3H_2O$ is a calcination reaction (removal of water).$PbS 	o PbSO_4$ is an oxidation reaction (roasting),not calcination,as it involves the addition of oxygen to a sulfide ore.$PbSO_4$ is already an oxidized form and does not undergo calcination under standard conditions.Therefore,the reaction $PbS 	o PbSO_4$ is a roasting process,not calcination.

List-$I$	List-$II$
$(I)$ Calcination	$a. Fe_2O_3 \cdot nH_2O \rightarrow Fe_2O_3 + nH_2O$
$(II)$ Roasting	$b. 2Cu_2S + 3O_2 \rightarrow 2Cu_2O + 2SO_2$
$(III)$ Flux	$c. SiO_2 + FeO \rightarrow FeSiO_3$
$(IV)$ Thermite	$d. Cr_2O_3 + 2Al \rightarrow Al_2O_3 + 2Cr$

Which reaction is not possible for calcination?

Similar Questions

In order to bring initial chemical change in the ore,the process of heating of ore below its melting point is known as

Match the following:

List-$I$ List-$II$

$(I)$ Calcination $a. Fe_2O_3 \cdot nH_2O \rightarrow Fe_2O_3 + nH_2O$

$(II)$ Roasting $b. 2Cu_2S + 3O_2 \rightarrow 2Cu_2O + 2SO_2$

$(III)$ Flux $c. SiO_2 + FeO \rightarrow FeSiO_3$

$(IV)$ Thermite $d. Cr_2O_3 + 2Al \rightarrow Al_2O_3 + 2Cr$

Heating of pyrites in air for oxidation of sulphur is called

Which of the following ores is subjected to roasting during metallurgical operations for getting the metal oxide?

Which one of the following statements is false?

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