Metals and non metals Worksheet-8
Multiple-Choice Question (One Option Correct):
(C) No compound can be formed
(D) Any of the bond can be formed
(A) Chlorine (B) Hydrogen
(C) Sodium Chlorate (D) Sodium hydroxide
(A) Hydrogen (B) Chlorine(g)
(C) Sodium metal (D) NaOH
(A) Hydrogen (B) Oxygen (C) Silicon (D) Carbon
(A) Mg (B) Cu (C) Zn (D) Fe
(A) Gravity separation (B) Forth floatation
(C) Electromagnetic Method (D) All of these
(A) Cu (B) Sn (C) Cr
(D) Pb, Zn, Fe (E) Both A & B (F) Both B & C
(A) Flux (B) Catalyst (C) Ore (D) Slag
(A) Catalyst (B) Ore (C) Slag (D) Matrix
(A) They are light (B) They bear electrostatic charge.
(C) They are insoluble. (D) They are wetted by oil
(B) X-atomic number-11-E.Fg-2,8,1 the element is Sodium Y-atomic number-17-E.fg- 2,8,7 the element is Chlorine
(B) Anode-Positive Electrode- the negative chloride ions are attracted to the anode.The chloride ions give electrons to the anode and get oxidized to chlorine gas.
(B) Formula of malachite - CuCO3.Cu(OH)2
(B) The formula of Zinc blende is ZnS The sulphide ores are concentrated by froth floatation.
(E) Moderately reactive metals like zinc, iron, tin and lead can be obtained by reduction of their oxides by carbon.
(D) Ores stick to the oil droplets and rise to the surface in the form of froth supported by air bubbles.