Related InterviewSolutions

• The mineral carnallite contains (i)("__________"") and (ii)("__________"") metals.(iii)("__________"") is purified by cupellation and (iv)("__________"") is purified by distillation .A. `{:("(i)","(ii)","(iii)","(iv)"),("calcium","zinc","mercury","tin"):}`B. `{:("(i)","(ii)","(iii)","(iv)"),("calcium","magnesium","zinc","lead"):}`C. `{:("(i)","(ii)","(iii)","(iv)"),("potassium","calcium","copper","mercury"):}`D. `{:("(i)","(ii)","(iii)","(iv)"),("magnesium","potassium","silver","mercury"):}`
• In the extraction of chlorine by electrolysis of brine_________.A. oxidation of `Cl^(-)` ion to chlorine gas occursB. reduction of `Cl^(-)` ion to chlorine gas occursC. for overall reaction `DeltaG^(@)` has negative valueD. a displacement reaction takes place
• Match the column I with Column II and mark the appropriate choice. A. `(A) to (i) , (B) to (ii), (C) to (iii) , (D) to (iv)`B. `(A) to (iii) , (B) to (i), (C) to (ii) , (D) to (iv)`C. `(A) to (ii) , (B) to (iv), (C) to (i) , (D) to (iii)`D. `(A) to (iv) , (B) to (iii), (C) to (i) , (D) to (ii)`
• Match the column I with Column II and mark the appropriate choice. A. `(A) to (iv) , (B) to (iii), (C) to (ii) , (D) to (i)`B. `(A) to (iii) , (B) to (ii), (C) to (i) , (D) to (iv)`C. `(A) to (ii) , (B) to (i), (C) to (iii) , (D) to (iv)`D. `(A) to (i) , (B) to (ii), (C) to (iii) , (D) to (iv)`
• Match the column I with Column II and mark the appropriate choice. A. `(A) to (iv) , (B) to (iii), (C) to (i) , (D) to (ii)`B. `(A) to (i) , (B) to (ii), (C) to (iv) , (D) to (iii)`C. `(A) to (i) , (B) to (ii), (C) to (iv) , (D) to (iii)`D. `(A) to (iii) , (B) to (iv), (C) to (i) , (D) to (ii)`
• Match the column I with Column II and mark the appropriate choice. A. `(A) to (i) , (B) to (iii), (C) to (ii) , (D) to (iv)`B. `(A) to (iii) , (B) to (iv), (C) to (ii) , (D) to (i)`C. `(A) to (ii) , (B) to (ii), (C) to (iii) , (D) to (i)`D. `(A) to (ii) , (B) to (i), (C) to (iv) , (D) to (iii)`
• Which of the following reactions taking place in the blast furnace during extraction of iron is endothermic .A. `CaCO_(3) to CaO + CO_(2)`B. `2C+O_(2)to 2CO`C. `C+O_(2) to CO_(2)`D. `Fe_(2)O_(3) + 3CO to 2Fe+3CO_(2)`
• At `1000^(@)C`, `Zn_((s)) +(1)/(2)O_(2(g)) to ZnO_((s)), DeltaG^(@)=-360 KJ "mol"^(-1)` `C_((s)) + (1)/(2)O_(2(g)) to CO_((g)),DeltaG^(@) =-460 KJ "mol"^(-1)` The correct statement isA. zinc can be oxidised by carbon monoxideB. zince blend is produced during the reactionC. zinc oxide can be reduced by graphiteD. zinc can be oxidised by graphite
• Match the column I with Column II and mark the appropriate choice. A. `(A) to (i), (B) to (ii), (C) to (iii), (D) to (iv)`B. `(A) to (ii), (B) to (iii), (C) to (iv), (D) to (i)`C. `(A) to (iv), (B) to (iii), (C) to (ii), (D) to (i)`D. `(A) to (iii), (B) to (i), (C) to (iv), (D) to (ii)`
• Name the four man zones of blast furnace in the extraction of `Fe` from `Fe_(2)O_(3)`.