Chemistry Worksheet With Answers Page 4
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734. The cyanide process is used for obtaining
(a) Cu (b) Na
(C) Zn (d) Ag
Ans.(d)
35. Which of the following ore does not represent the ores of iron?
(a) Cassitente (b) Limonite
(c) Haenatitc (d) Magnetite
Ans.(a)
36. vanArkel method of punficati’n of metals involves converting the metal to a
(a) volatile stable compound
(b) non.volatilc stable compound
(c) volatile unstable compound
(d) None of the above
Ans.(a)
37. The tirst element of rare earth metal is
(a) cerium (b) cesium
(C) lanthanide (d) actinide
Ans.(a)
38. Which of the following transitions involves maximum amount of energy?
(a)M_(g)— M(g)
(b)M_(g) –m+
(c)M(S) -M2+(g)
(d)M2+(g)-m3+(g)
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