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Factors affecting equilibrium: concentration, pressure, temperature, the effect of catalyst, Le Chatelier's principle Previous Year Questions for JEE

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Q1ChemistryUnit 6: Equilibrium
Which of the following will change the value of the equilibrium constant for the reaction? N2(g)+O2(g)⇋2NO(g)N_{2}(g)+O_{2}(g) \leftrightharpoons 2 N O(g)
Q2ChemistryUnit 6: Equilibrium
Q Type your question One of the chief uses of sodium carbonate has been in the conversion of Ca⁡(OH)2(s)\operatorname{Ca}(O H)_{2}(s) to concentrated aqueous solution of NaOH which in turn was used in the manufacture of soap. Ca(OH)2(s)+2Na+(aq)+\boldsymbol{C a}(\boldsymbol{O H})_{2}(\boldsymbol{s})+\boldsymbol{2} \boldsymbol{N} \boldsymbol{a}^{+}(\boldsymbol{a q})+ CO32−(aq)⇌CaCO3(s)+\boldsymbol{C O}_{3}^{2-}(\boldsymbol{a q}) \rightleftharpoons \boldsymbol{C a C O}_{3}(\boldsymbol{s})+ 2Na+(aq)+2OH−(aq)\mathbf{2} N \boldsymbol{a}^{+}(\boldsymbol{a} \boldsymbol{q})+\mathbf{2} \boldsymbol{O} \boldsymbol{H}^{-}(\boldsymbol{a} \boldsymbol{q}) In 1775,1775, in order to gain independence from the importation of natural Na2CO3,N a_{2} C O_{3}, the French government offered a prize to anyone who could devise a process to prepare Na2CO3N a_{2} C O_{3} from NaCl A more economical process but based on the same principle was given by :
Q3ChemistryUnit 6: Equilibrium
The following reaction occurs in the Blast Furnace where ion ore is reduced to iron metal: Fe2O3(s)+3CO(g)⇌2Fe(l)+\boldsymbol{F e}_{2} \boldsymbol{O}_{3}(\boldsymbol{s})+\boldsymbol{3} \boldsymbol{C O}(\boldsymbol{g}) \rightleftharpoons \boldsymbol{2} \boldsymbol{F} \boldsymbol{e}(l)+ 3CO(g)3 C O(g) Using Le Chatelier's principle, predict which of the following will not disturb the equilibrium?

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