2023
NEET
MCQ
NEET 2023 Manipur
Match List - I with List - II
| List - I (Mixtures/Sample) |
List - II (Technique used for purification) |
||
|---|---|---|---|
| (A) | Glycerol from spent lye | (I) | Steam distillation |
| (B) | Chloroform + Aniline | (II) | Fractional distillation |
| (C) | Fractions of crude oil | (III) | Distillation under reduced pressure |
| (D) | Aniline + Water | (IV) | Distillation |
Choose the correct answer from the options given below :
A.
(A) - (III), (B) - (IV), (C) - (II), (D) - (I)
B.
(A) - (IV), (B) - (II), (C) - (I), (D) - (III)
C.
(A) - (I), (B) - (II), (C) - (III), (D) - (IV)
D.
(A) - (I), (B) - (III), (C) - (II), (D) - (IV)
2023
NEET
MCQ
NEET 2023 Manipur
Read the following statements and choose the set of correct statements :
(A) Chrome steel is used for cutting tools and crushing machines.
(B) The fine dust of aluminium is used in paints and lacquers.
(C) Copper is used for reduction of alcohol
(D) Zinc dust is used as a reducing agent in the manufacture of paints
(E) Iron is used for galvanising zinc
Choose the most appropriate answer from the options given below :
A.
(D) and (E) only
B.
(A) and (D) only
C.
(A), (B) and (D) only
D.
(B), (C) and (D) only
2023
NEET
MCQ
NEET 2023
The reaction that does NOT take place in blast furnace between 900 K to 1500 K temperature range during extraction of iron is :
A.
$\mathrm{FeO}+\mathrm{CO} \rightarrow \mathrm{Fe}+\mathrm{CO}_{2}$
B.
$\mathrm{C}+\mathrm{CO}_{2} \rightarrow 2 \mathrm{CO}$
C.
$\mathrm{CaO}+\mathrm{SiO}_{2} \rightarrow \mathrm{CaSiO}_{3}$
D.
$\mathrm{Fe}_{2} \mathrm{O}_{3}+\mathrm{CO} \rightarrow 2 \mathrm{FeO}+\mathrm{CO}_{2}$
2022
NEET
MCQ
NEET 2022 Phase 1
Match List - I with List - II.
| List - I (Ores) |
List - II (Composition) |
||
|---|---|---|---|
| (a) | Haematite | (i) | Fe$_3$O$_4$ |
| (b) | Magnetite | (ii) | ZnCO$_3$ |
| (c) | Calamine | (iii) | Fe$_2$O$_3$ |
| (d) | Kaolinite | (iv) | [Al$_2$(OH)$_4$Si$_2$O$_5$] |
Choose the correct answer from the options given below:
A.
(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
B.
(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
C.
(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
D.
(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
2021
NEET
MCQ
NEET 2021
The maximum temperature that can be achieved in blast furnace is :
A.
Upto 5000 K
B.
Upto 1200 K
C.
Upto 2200 K
D.
Upto 1900 K
2021
NEET
MCQ
NEET 2021
Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature?
A.
Zone refining
B.
Electrolysis
C.
Chromatography
D.
Distillation
2020
NEET
MCQ
NEET 2020 Phase 1
Identify the correct statement from the following :
A.
Blister copper has blistered appearance due to evolution of CO2
B.
Vapour phase refining is carried out for Nickel by Van Arkel method.
C.
Pig iron can be moulded into a variety of shapes.
D.
Wrought iron is impure iron with 4% carbon.
2019
NEET
MCQ
NEET 2019
Which one is malachite from the following?
A.
Fe3O4
B.
CuCO3.Cu(OH)2
C.
CuFeS2
D.
Cu(OH)2
2018
NEET
MCQ
NEET 2018
Considering Ellingham diagram, which of the
following metals can be used to reduce
alumina?
A.
Fe
B.
Zn
C.
Mg
D.
Cu
2017
NEET
MCQ
NEET 2017
Extraction of gold and silver involves leaching with CN$-$ ion. Silver is later recovered by
A.
distillation
B.
zone refining
C.
displacement with Zn
D.
liquation
2016
NEET
MCQ
NEET 2016 Phase 1
Match items of Column I with the items of Column II and assign the correct code :
| Column ${\rm I}$ | Column ${\rm I}$${\rm I}$ | |||
|---|---|---|---|---|
| (A) | Cyanide process | (i) | Ultrapure Ge | |
| (B) | Froth floatation process | (ii) | Dressing of ZnS | |
| (C) | Electrolytic reduction | (iii) | Extraction of Al | |
| (D) | Zone refining | (iv) | Extraction of Au | |
| (v) | Purification of Ni | |||
A.
(A) $ \to $ (i); (B) $ \to $ (ii); (C) $ \to $ (iii); (D) $ \to $ (iv)
B.
(A) $ \to $ (iii); (B) $ \to $ (iv); (C) $ \to $ (v); (D) $ \to $ (i)
C.
(A) $ \to $ (iv); (B) $ \to $ (ii); (C) $ \to $ (iii); (D) $ \to $ (i)
D.
(A) $ \to $ (ii); (B) $ \to $ (iii); (C) $ \to $ (i); (D) $ \to $ (v)
2015
NEET
MCQ
AIPMT 2015
In the extraction of copper from its sulphide ore. the metal is finally obtained by the reduction of cuprous oxide with
A.
carbon monoxide
B.
copper (I) sulphide
C.
sulphur dioxide
D.
iron (II) sulphide.
2015
NEET
MCQ
AIPMT 2015 Cancelled Paper
''Metals are usually not found as nitrates in their ores.'' Out of the following two (I and II) reasons which is/are true for the above observation?
I. Metal nitrates are highly unstable.
II. Metal nitrates are highly soluble in water.
I. Metal nitrates are highly unstable.
II. Metal nitrates are highly soluble in water.
A.
I is false but II is true.
B.
I is true but II is false.
C.
I and II are true.
D.
I and II are false
2013
NEET
MCQ
NEET 2013 (Karnataka)
The metal oxide which cannot be reduced to metal by carbon is
A.
Al2O3
B.
PbO
C.
ZnO
D.
Fe2O3
2013
NEET
MCQ
NEET 2013
Roasting of sulphides gives the gas X as a byproduct. This is a colourless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic, acts as a reducing agent and its acid has never been isolated. The gas X is
A.
CO2
B.
SO3
C.
H2S
D.
SO2
2012
NEET
MCQ
AIPMT 2012 Prelims
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with
A.
carbon monoxide
B.
copper (I) sulphide
C.
sulphur dioxide
D.
iron (II) sulphide.
2012
NEET
MCQ
AIPMT 2012 Prelims
Which one of the following is a mineral of iron?
A.
Malachite
B.
Cassiterite
C.
Pyrolusite
D.
Magnetite
2012
NEET
MCQ
AIPMT 2012 Prelims
Aluminium is extracted from alumina (Al2O3) by electrolysis of a molten mixture of
A.
Al2O3 + HF + NaAlF4
B.
Al2O3 + CaF2 + NaAlF4
C.
Al2O3 + Na3AlF6 + CaF2
D.
Al2O3 + KF + Na3AlF6
2011
NEET
MCQ
AIPMT 2011 Mains
The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag.
A.
Fe2O3(s) + 3CO(g) $ \to $ 2Fe(l) + 3CO2(g)
B.
CaCO3(s) $ \to $ CaO(s) + CO2(g)
C.
CaO(s) + SiO2(s) $ \to $ CaSiO3(s)
D.
2C(s) + O2(g) $ \to $ 2CO(g)
2011
NEET
MCQ
AIPMT 2011 Prelims
Which of the following pairs of metals is purified by van-Arkel method?
A.
Ga and In
B.
Zr and Ti
C.
Ag and Au
D.
Ni and Fe
2011
NEET
MCQ
AIPMT 2011 Prelims
Which of the following elements is present as the impurity to the maximum extent in the pig iron?
A.
Manganese
B.
Carbon
C.
Silicon
D.
Phosphorus
2007
NEET
MCQ
AIPMT 2007
Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?
A.
The $\Delta $G$_f^o$ of the sulphide is greater than those for CS2 and H2S.
B.
The $\Delta $G$_f^o$ is negative for roasting of sulphide ore to oxide.
C.
Roasting of the sulphide to the oxide is thermodynamically feasible.
D.
Carbon and hydrogen are suitable reducing agents for metal sulphides.
2007
NEET
MCQ
AIPMT 2007
Sulphide ores of metals are usually concentrated by froth floatation process. Which one of the following sulphide ores offer an exception and is concentrated by chemical leaching?
A.
Galena
B.
Copper pyrite
C.
Sphalerite
D.
Argentite
2003
NEET
MCQ
AIPMT 2003
The method of zone refining of metals is based on the principle of
A.
greater mobility of the pure metal than that of the impurity
B.
higher melting point of the impurity than that of the pure metal
C.
greater noble character of the solid metal than that of the impurity
D.
greater solubility of the impurity in the molten state than in the solid