For the dissociation of limestone in the slag zone of the blast furnace, the reaction is
- exothermic accompanied by increase in entropy
- endothermic accompanied by decrease flux used is in entropy
- endothermic accompanied by increase in entropy.
- exothermic with no change in entropy
The Correct Option is C
Solution and Explanation
$ { CaCO_{3(s)} ->[\Delta] CaO_{(s)} + CO_{2(g)} }$
The reaction proceeds with absorption of heat and leads to increase in entropy due to formation of $ {CO_2}$ gas.
Top Questions on General Principles and Processes of Isolation of Elements
- On reaction of Lead Sulphide with dilute nitric acid which of the following is not formed ?
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The reaction that does NOT take place in a blast furnace between 900 K to 1500 K temperature range during extraction of iron is?
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Consider the following statements about the oxides of halogens
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C. I2O5 is used in the estimation of CO
D. ClO2; is used as a bleaching agent
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- Which of the following ore is not in oxide form?
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Concepts Used:
General Principles and Processes of Isolation of Elements
What are Ores and Minerals?
Minerals are the naturally occurring, homogeneous inorganic solid substances. They are having a definite chemical composition and crystalline structure, hardness and color. For example, copper pyrite, calamine, etc.
Impurities in an ore are called gauge. The removal of a gauge from the ore is called concentration ore.
Several steps are involved in the extraction of pure metal from ores. Major steps are as follows –
- Concentration of the ore
- Isolation of the metal from its concentrated ore
- Purification of the metal