Question 1: Palette 1/24

NEET 2023 MCQ

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)

Question 2: Palette 2/24

NEET 2023 MCQ

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

Question 3: Palette 3/24

NEET 2023 MCQ

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

$\mathrm{Fe}_{2} \mathrm{O}_{3}+\mathrm{CO} \rightarrow 2 \mathrm{FeO}+\mathrm{CO}_{2}$

Question 4: Palette 4/24

NEET 2022 MCQ

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)

Question 5: Palette 5/24

NEET 2021 MCQ

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

Question 6: Palette 6/24

NEET 2021 MCQ

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

Question 7: Palette 7/24

NEET 2020 MCQ

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.

Question 8: Palette 8/24

NEET 2019 MCQ

Which one is malachite from the following?

A

Fe₃O₄

B

CuCO₃.Cu(OH)₂

C

CuFeS₂

D

Cu(OH)₂

Question 9: Palette 9/24

NEET 2018 MCQ

Considering Ellingham diagram, which of the following metals can be used to reduce alumina?

A

Fe

B

Zn

C

Mg

D

Cu

Question 10: Palette 10/24

NEET 2017 MCQ

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

Question 11: Palette 11/24

NEET 2016 MCQ

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)

Question 12: Palette 12/24

NEET 2015 MCQ

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.

Question 13: Palette 13/24

NEET 2015 MCQ

''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.

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

Question 14: Palette 14/24

NEET 2013 MCQ

The metal oxide which cannot be reduced to metal by carbon is

A

Al₂O₃

B

PbO

C

ZnO

D

Fe₂O₃

Question 15: Palette 15/24

NEET 2013 MCQ

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

Question 16: Palette 16/24

NEET 2012 MCQ

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.

Question 17: Palette 17/24

NEET 2012 MCQ

Which one of the following is a mineral of iron?

A

Malachite

B

Cassiterite

C

Pyrolusite

D

Magnetite

Question 18: Palette 18/24

NEET 2012 MCQ

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

Question 19: Palette 19/24

NEET 2011 MCQ

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

Fe₂O_3(s) + 3CO_(g) $ \to $ 2Fe_(l) + 3CO_2(g)

B

CaCO_3(s) $ \to $ CaO_(s) + CO_2(g)

C

CaO_(s) + SiO_2(s) $ \to $ CaSiO_3(s)

D

2C_(s) + O_2(g) $ \to $ 2CO_(g)

Question 20: Palette 20/24

NEET 2011 MCQ

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

Question 21: Palette 21/24

NEET 2011 MCQ

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

Question 22: Palette 22/24

NEET 2007 MCQ

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.

Question 23: Palette 23/24

NEET 2007 MCQ

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

Question 24: Palette 24/24

NEET 2003 MCQ

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