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1
TG EAPCET 2025 (Online) 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Metal $X$ obtained from sphalarite ore can be purified by which of the following method?

A

Distillation

B

Poling

C

Zone refining

D

Vapour phase refining

2
TG EAPCET 2025 (Online) 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Identify the reaction, which is not related to extraction of copper

A

$2 \mathrm{Cu}_2 \mathrm{~S}+3 \mathrm{O}_2 \longrightarrow 2 \mathrm{Cu}_2 \mathrm{O}+2 \mathrm{SO}_2$

B

$2 \mathrm{FeS}+3 \mathrm{O}_2 \longrightarrow 2 \mathrm{FeO}+2 \mathrm{SO}_2$

C

$\mathrm{FeO}+\mathrm{SiO}_2 \longrightarrow \mathrm{FeSiO}_3$

D

$\mathrm{SiO}_2+\mathrm{CaO} \longrightarrow \mathrm{CaSiO}_3$

3
TG EAPCET 2024 (Online) 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Match the following

List I (Alloy) List II (Use)
A Li-Pb I. In aircraft construction
B Be-Cu II. To make bearings for motor engines
C Mg-Al III. To make tetraethyl lead
D Na-Pb IV. To make high strength springs

The correct answer is

A
A-II; B-IV; C-III; D-I
B
A-II; B-IV; C-I; D-III
C
A-IV; B-I; C-II; D-III
D
A-III; B-II; C-I; D-IV
4
TG EAPCET 2024 (Online) 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Copper matte is mixture of
A
oxides of Cu and Fe
B
carbonates of Cu and Fe
C
sulphides of Cu and Fe
D
silicates of Cu and Fe
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