Page 220 - Chemistry ICSE Class X
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206 ICSE Chemistry – 10
(xiii) Metals like zinc, copper, nickel, tin, lead are obtained from their oxide ores by
(a) carbon-reduction
(b) aluminium-reduction
(c) self-reduction
(d) electrolytic-reduction
(xiv) Chromium is obtained from its oxide by
(a) carbon-reduction
(b) aluminium-reduction
(c) electrolytic-reduction
(d) self-reduction
(xv) Iron is protected from rusting by coating it with
(a) nickel
(b) chromium .
(c) copper
(d) zinc
(xvi) Brass is
(a) an alloy
(b) a metal
(c) a metalloid
(d) a nonmetal
(xvii) Stainless steel is usually made by alloying iron with
(a) Fe and Cu
(b) Cu and Cr
(c) Cu and Ni
(d) Cr and Ni
(xviii) An alloy containing copper (80%), zinc (10%) and tin (10%) is called
(a) German silver
(b) brass
(c) gun metal
(d) bronze
(xix) Magnalium is an alloy of the following metals:
(a) Al, Mn
(b) Al, Mg
(c) Al, Cu
(d) Cu, Mg
(xx) German silver is an alloy of
(a) copper
(b) magnesium
(c) lead
(d) iron
ŶƐǁĞƌƐ
(i) (b) (ii) (b) (iii) (c) (iv) (a) (v) (d) (vi) (b) (vii) (b) (viii) (a)
(ix) (c) (x) (a) (xi) (c) (xii) (d) (xiii) (a) (xiv) (b) (xv) (d) (xvi) (a)
(xvii) (d) (xviii) (d) (xix) (b) (xx) (a)
