Surface Chemistry and Isolation of Elements Archives - Page 3 of 9

The method not used in metallurgy to refine the impure metal is Options (a) Mond's process (b) Van-Arkel process (c)…

7 years ago

Which of the following sulphides when heated strongly in air gives the corresponding metal Options (a) Cu₂S (b) CuS (c)…

7 years ago

Carnallite on electrolysis gives Options (a) Ca and Cl₂ (b) Na and CO₂ (c) Al and Cl₂ (d) K and…

7 years ago

Electromagnetic separation is used in the concentration of Options (a) copper pyrites (b) bauxite (c) cassiterite (d) cinnabar Correct Answer:…

7 years ago

Sea weeds are an important source of Options (a) fluorine (b) bromine (c) sulphur (d) iodine Correct Answer: iodineExplanation:No explanation…

7 years ago

Thomas slag is Options (a) CaSiO₃ (b) Ca₃(PO₄)₂ (c) MnSiO₃ (d) CaCO₃ Correct Answer: Ca₃(PO₄)₂Explanation:No explanation available. Be the first…

7 years ago

Bauxite is concentrated by Options (a) magnetic separation (b) roasting (c) froth floatation process (d) chemical method Correct Answer: chemical…

7 years ago

Copper pyrite, the chief ore of copper, is Options (a) CuFeS₂ (b) Cu₂S (c) CuCO₃.Cu(OH)₂ (d) Cu₂O Correct Answer: CuFeS₂Explanation:No…

7 years ago

The metal used to recover copper from a solution of copper sulphate is Options (a) Na (b) Fe (c) Hg…

7 years ago

Malachite is an ore of Options (a) Fe (b) Ag (c) Cr (d) Cu Correct Answer: CuExplanation:No explanation available. Be…

7 years ago