Question No:1

ASSERTION: In calcination, ore is heated in the absence or Limited supply of air
REASON : Concentration of hydreated orcarbonate ore is done by calcinaton

[A] If both ( and (R) are true and (R) is a correct explanation of the (
[B] If both (A) and (R) are true but (R) is a not correct explanation of the (A)
[C] If (A) is true but the (R) is false
[D] If (A) is false but the (R) is true



Question No:2

ASSERTION : Metals of high purity are obtained by zone refiling.
REASON : Zone-refining is based on the principle of fractional crystallisation.

[A] If both ( and (R) are true and (R) is a correct explanation of the (
[B] If both (A) and (R) are true but (R) is a not correct explanation of the (A)
[C] If (A) is true but the (R) is false
[D] If (A) is false but the (R) is true



Question No:3

ASSERTION: Wrought iron is more malleable and ductile than steel.
REASON : It contains slightly less percentage of carbon

[A] If both ( and (R) are true and (R)isa correct explanation of the (
[B] If both (A) and (R) are true but (R) is a not correct explanation of the (A)
[C] If (A) is true but the (R) is false
[D] If (A) is false but the (R) is true



Question No:4

ASSERTION : Zn andHg are purified by distillation method.
REASON : Both Zn and Hg are liquid metals at O&8451;

[A] If both ( and (R) are true and (R) is a correct explanation of the (
[B] If both (A) and (R) are true but (R) is a not correct explanation of the (A)
[C] If (A) is true but the (R) is false
[D] If (A) is false but the (R) is true



Question No:5

ASSERTION : Zr and Hf are used in space technology.
REASON : Metals used in space technology are purified by Van-Arkel’s process.

[A] If both ( and (R) are true and (R) is a correct explanation of the (
[B] If both (A) and (R) are true but (R) is a not correct explanation of the (A)
[C] If (A) is true but the (R) is false
[D] If (A) is false but the (R) is true



Question No:6

ASSERTION: Ellingham’s diagram gives the variation of V_f G ⁰ with temperature of oxides of various elements.
REASON: Ellingham’s diagram helps in predicting feasibility of reduction of an oxide ore.

[A] If both ( and (R) are true and (R) is a correct explanation of the (
[B] If both (A) and (R) are true but (R) is a not correct explanation of the (A)
[C] If (A) is true but the (R) is false
[D] If (A) is false but the (R) is true



Question No:7

COLUMN-1— COLUMN-II
A)Al— P) Calamine
B)Cu— Q) Cryolite
C)Mg— R) Malchite
D)Zn—S) Carnilite

[A] A-S, B-Q, C-P, D-R
[B] A- S, B-R, C – Q, D – P
[C] A-Q, B-R, C-S, D-P
[D] A-R, B-Q, C-S, D-P



Question No:8

COLUMN-I—- COLUMN-ll
A) Al—- P) Bauxite
B) Cu—- Q) Limonite
C) Fe—- R) Galena
D) Lead—-S) Chalcocit

[A] A- S, B-Q, C-P, D-R
[B] A-P, B-S, C-R, D-Q
[C] A- P, B-Q, C-R, D – S
[D] A-P, B-S, C-Q, D-R



Question No:9

COLUMN-I—COLUMN-Il
A) Gravity separation P) Argentite
B) Electro-magnatic Q) SnO₂ separation
C) Froth floatation R) PbS
D) Leaching–S) CaCO₃

[A] A- S, B-Q, C-P, D-R
[B] A- S, B-Q, C-R, D-P
[C] A- P, B-Q, C – R, D – S
[D] A-S, B-R, C-Q, D-P



Question No:10

COLUMN-l COLUMN-II
A) Mond’s Process P) Steel manufaturing
B)Van-Arkel’s process Q) Si and Ge
C) Zone-refining R) Ti and U
D) Bessemerisation S) Ni

[A] A-S, B-Q, C-P, D-R
[B] A- S, B-R, C-Q, D-P
[C] A- P, B-Q, C – R, D – S
[D] A-R, B-Q, C-S, D-P



Question No:11

COLUMN-I— COLUMN-II
A) Van-Arkel’s method P) purification ofcopper
B) Zone refining Q) purification of silicon
C) Cupellation R) purification of titanium
D) Poling S) refining of silver

[A] A- S, B-Q, C-P, D-R
[B] A- S, B-R, C-Q, D-P
[C] A-P, B-Q, C-R, D-S
[D] A-R, B-Q, C-S, D-P



Question No:12

A mineral is called ore if

[A] Metal present in the mineral is costly
[B] A metal can be extracted from it
[C] A metal can be extracted profitably from it
[D] A metal can not be extracted from it



Question No:13

Autoreduction process is used in the extraction of:-

[A] Cu&Pb
[B] Zn&Hg
[C] Cu&Al
[D] Fe&Pb



Question No:14

Select the correct statement:-

[A] Dolomite is the ore of Zinc
[B] Galena is the ore of Mercury
[C] Magnesite is the ore of Iron
[D] Cassiterite is the ore of Tin



Question No:15

When Alumina is electrolysed in presence of cryolite, the gas liberated at graphite anode is:-

[A] F₂
[B] O₂
[C] CF₄
[D] Cl₂