Question 1: Palette 1/18

JEE Advanced 2026 MSQ

Reaction of PtF₆ with oxygen (O₂) gas results in the formation of an ionic compound, X⁺Y^-.
Correct statement(s) is(are)

A

The bond order of X⁺ is 1.5.

B

Valence d-orbitals of the metal ion in X⁺Y^- has 5 electrons.

C

PtF₆ acts as an oxidant in this reaction.

D

PtF₆ acts as a fluorinating agent in this reaction.

Question 2: Palette 2/18

JEE Advanced 2025 MCQ

One of the products formed from the reaction of permanganate ion with iodide ion in neutral aqueous medium is

A

I₂

B

IO₃⁻

C

IO₄⁻

D

IO₂⁻

Question 3: Palette 3/18

JEE Advanced 2020 MSQ

Choose the correct statement(s) among the following :

A

SnCl₂ . 2H₂O is a reducing agent.

B

SnO₂ reacts with KOH to form K₂[Sn(OH)₆].

C

A solution of PbCl₂ in HCl contains Pb²⁺ and Cl^$-$ ions.

D

The reaction of Pb₃O₄ with hot dilute nitric acid to give PbO₂ is a redox reaction.

Question 4: Palette 4/18

JEE Advanced 2017 MCQ

The order of the oxidation state of the phosphorous atom in

${H_3}P{O_2},{H_3}P{O_4},{H_3}P{O_3}$ and ${H_4}{P_2}{O_6}$ is

A

${H_3}P{O_3} > {H_3}P{O_2} > {H_3}P{O_4} > {H_4}{P_2}{O_6}$

B

${H_3}P{O_4} > {H_3}P{O_2} > {H_3}P{O_3} > {H_4}{P_2}{O_6}$

C

${H_3}P{O_4} > {H_4}{P_2}{O_6} > {H_3}P{O_3} > {H_3}P{O_2}$

D

${H_3}P{O_2} > {H_3}P{O_3} > {H_4}{P_2}{O_6} > {H_3}P{O_4}$

Question 5: Palette 5/18

JEE Advanced 2015 MSQ

Fe³⁺ is reduced to Fe²⁺ by using

A

H₂O₂ in presence of NaOH.

B

Na₂O₂ in water.

C

H₂O₂ in presence of H₂SO₄.

D

Na₂O₂ in presence of H₂SO₄.

Question 6: Palette 6/18

JEE Advanced 2014 MSQ

For the reaction,

${I^ - } + ClO_3^ - + {H_2}S{O_4} \to C{l^ - } + HSO_4^ - + {I_2}$

the correct statement(s) in the balanced equation is/are

A

stoichiometric coefficient of HSO$_4^ - $ is 6

B

iodide is oxidised

C

sulphur is reduced

D

H₂O is one of the products

Question 7: Palette 7/18

JEE Advanced 2011 MSQ

Reduction of the metal centre in aqueous permanganate ion involves

A

3 electrons in neutral medium.

B

5 electrons in neutral medium.

C

3 electrons in alkaline medium.

D

5 electrons in acidic medium.

Question 8: Palette 8/18

JEE Advanced 2007 MCQ

Match the reactions in Column I with nature of the reactions/type of the products in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 $\times$ 4 matrix given in the ORS.

	Column I		Column II
(A)	$\mathrm{O_2^ - \to {O_2} + O_2^{2 - }}$	(P)	redox reaction
(B)	$\mathrm{CrO_4^{2 - } + {H^ + }}$	(Q)	one of the products has trigonal planar structure
(C)	$\mathrm{MnO_4^ - + NO_2^ - + {H^ + } \to}$	(R)	dimeric bridged tetrahedral metal ion
(D)	$\mathrm{NO_3^ - + {H_2}S{O_4} + F{e^{2 + }} \to }$	(S)	disproportionation

A

$\mathrm{A-(p,s);B-(r);C-(p,q);D-(p)}$

B

$\mathrm{A-(p);B-(r);C-(p);D-(p)}$

C

$\mathrm{A-(p,s);B-(r);C-(p);D-(p, q)}$

D

$\mathrm{A-(p);B-(r, s);C-(p,q);D-(p)}$

Question 9: Palette 9/18

JEE Advanced 2001 MCQ

The reaction, $3Cl{O^ - }(aq)$$ \to ClO_3^ - (aq) + 2C{l^ - }(aq)$ is an example of :

A

Oxidation reaction

B

Reduction reaction

C

Disproportionate reaction

D

Decomposition reaction

Question 10: Palette 10/18

JEE Advanced 2000 MCQ

Amongst the following identify the species with an atom in +6 oxidation state

A

$MnO_4^ - $

B

$Cr(CN)_6^{3 - }$

C

$NiF_6^{2 - }$

D

$Cr{O_2}C{l_2}$

Question 11: Palette 11/18

JEE Advanced 1999 MCQ

The normality of 0.3 M phosphorus acid (H₃PO₃) is

A

0.1

B

0.9

C

0.3

D

0.6

Question 12: Palette 12/18

JEE Advanced 1992 MCQ

For the redox reaction:
$MnO_4^ - + {C_2}O_4^{ - 2} + {H^ + }$ $ \to M{n^{2 + }} + C{O_2} + {H_2}O$
The correct coefficients of the reactants for the balanced reaction are

A

$MnO_4^ - \,\, \to \,\,2,\,\,{C_2}O_4^{2 - }\, \to \,\,5,\,{H^ + } \to \,\,16$

B

$MnO_4^ - \,\, \to \,\,16,\,\,{C_2}O_4^{2 - }\, \to \,\,5,\,{H^ + } \to \,\,2$

C

$MnO_4^ - \,\, \to \,\,5,\,\,{C_2}O_4^{2 - }\, \to \,\,16,\,{H^ + } \to \,\,2$

D

$MnO_4^ - \,\, \to \,\,2,\,\,{C_2}O_4^{2 - }\, \to \,\,16,\,{H^ + } \to \,\,5$

Question 13: Palette 13/18

JEE Advanced 1991 MCQ

The volume strength of 1.5 N H₂O₂ solution is

A

4.8

B

8.4

C

3.0

D

8.0

Question 14: Palette 14/18

JEE Advanced 1990 MCQ

The oxidation number of phosphorus in Ba(H₂PO₂) is :

A

+3

B

+2

C

+1

D

-1

Question 15: Palette 15/18

JEE Advanced 1988 MCQ

The equivalent weight of MnSO₄ is half of its molecular weight, when it converts to

A

Mn₂O₃

B

MnO₂

C

$MnO_4^ - $

D

$MnO_4^{2 - }$

Question 16: Palette 16/18

JEE Advanced 1982 MCQ

The oxidation number of carbon in CH₂O is

A

-2

B

+2

C

0

D

+4

Question 17: Palette 17/18

JEE Advanced 1981 MCQ

1 mole of N₂H₄ loses 10 moles of electrons to form a new compound Y. assuming that all nitrogen appears in the new compound , what is the oxidation state of nitrogen in Y ? (there is no change in the oxidation state of hydrogen)

A

-1

B

-3

C

+3

D

+5

Question 18: Palette 18/18

JEE Advanced 1980 MCQ

M is molecular weight of KMnO₄. The equivalent wight of KMnO₄ when it is converted into K₂MnO₄ is

A

M

B

M/3

C

M/5

D

M/7