Given below are two statements: Statements I : Sphalerite is a sulphide ore of zinc and copper glanc — JEE Mains Chemistry Past Papers Chemistry Question
Question
Given below are two statements: Statements I : Sphalerite is a sulphide ore of zinc and copper glance is a sulphide ore of copper. Statements II: It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using 'depressants' in a froth flotation method. Choose the most appropriate answer from the options given below: (A) Both Statement I and Statement II are true (B) Statement I is true but Statement II is false. (C) Statement I is false but Statement II is true. (D) Both Statement I and Statement II are false. uhps nks dFku fn, x, gSaA dFku I : ftad dk ,d lYQkbM v;Ld LQsysjkbV gSa ,oa dkWij dk ,d lYQkbM v;Ld dkWij XykUl gSA dFku II: Qsu ¶you fof/k esa rsy rFkk ty ds vuqikr dks la;ksftr djds vFkok (depressants) dk mi;ksx djds nks lYQkbM v;Ldksa dks i`Fkd djuk laHko gksrk gSA uhps fn, fodYiksa esa ls lokZf/kd mi;qDr mÙkj pqusa% (1) nksuksa dFku I ,oa dFku II lgh gSaA (2) dFku I lgh gS ijUrq dFku II xyr gSA (3) dFku I xyr gS ijUrq dFku II lghgSA (4) nksuksa dFku I ,oa dFku II xyr gSaA
💡 Solution & Explanation
Sphelarite ZnS Copper glance Cu2S it is possible to separate two sulphide ores by adjusting proportion of oil to water or by using ‘depressants’. For example, in case of an ore containing ZnS and PbS, the depressant used is NaCN. It selectively prevents ZnS from coming to the froth but allows PbS to come with the froth.