Question 1: Palette 1/65

JEE Advanced 2026 MSQ

Correct statement(s) about the compounds P, Q and R is(are)

A

P has two lone pairs of electrons on the central atom.

B

Q has a perfect octahedral geometry.

C

Q can act as a fluorinating agent.

D

The molecular structure of R is trigonal pyramidal.

Question 2: Palette 2/65

JEE Advanced 2026 MSQ

Correct statement(s) about the compounds X, Y and Z is (are)

A

X is used for sterilizing drinking water.

B

Y has a planar structure.

C

Z is used in the enrichment of $^{235}$U.

D

Y is a stronger Lewis base than ammonia.

Question 3: Palette 3/65

JEE Advanced 2025 MCQ

The complete hydrolysis of ICl, ClF₃ and BrF₅, respectively, gives :

A

IO^-, ClO₂^- and BrO₃^-

B

IO₃^-, ClO₂^- and BrO₃^-

C

IO^-, ClO^- and BrO₂^-

D

IO₃^-, ClO₄^- and BrO₂^-

Question 4: Palette 4/65

JEE Advanced 2025 MCQ

The heating of NH₄NO₂ at 60–70 °C and NH₄NO₃ at 200–250 °C is associated with the formation of nitrogen containing compounds X and Y, respectively. X and Y, respectively, are

A

N₂ and N₂O

B

NH₃ and NO₂

C

NO and N₂O

D

N₂ and NH₃

Question 5: Palette 5/65

JEE Advanced 2025 MSQ

The compound(s) with P–H bond(s) is(are)

A

H₃PO₄

B

H₃PO₃

C

H₄P₂O₇

D

H₃PO₂

Question 6: Palette 6/65

JEE Advanced 2024 MCQ

The species formed on fluorination of phosphorus pentachloride in a polar organic solvent are

A

$\left[\mathrm{PF}_4\right]^{+}\left[\mathrm{PF}_6\right]^{-}$and $\left[\mathrm{PCl}_4\right]^{+}\left[\mathrm{PF}_6\right]^{-}$

B

$\left[\mathrm{PCl}_4\right]^{+}\left[\mathrm{PCl}_4 \mathrm{~F}_2\right]^{-}$and $\left[\mathrm{PCl}_4\right]^{+}\left[\mathrm{PF}_6\right]^{-}$

C

$\mathrm{PF}_3$ and $\mathrm{PCl}_3$

D

$\mathrm{PF}_5$ and $\mathrm{PCl}_3$

Question 7: Palette 7/65

JEE Advanced 2024 MCQ

At room temperature, disproportionation of an aqueous solution of in situ generated nitrous acid $\left(\mathrm{HNO}_2\right)$ gives the species

A

$\mathrm{H}_3 \mathrm{O}^{+}, \mathrm{NO}_3^{-}$and $\mathrm{NO}$

B

$\mathrm{H}_3 \mathrm{O}^{+}, \mathrm{NO}_3{ }^{-}$and $\mathrm{NO}_2$

C

$\mathrm{H}_3 \mathrm{O}^{+}, \mathrm{NO}^{-}$and $\mathrm{NO}_2$

D

$\mathrm{H}_3 \mathrm{O}^{+}, \mathrm{NO}_3{ }^{-}$and $\mathrm{N}_2 \mathrm{O}$

Question 8: Palette 8/65

JEE Advanced 2024 MSQ

The compound(s) having peroxide linkage is(are)

A

$\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_7$

B

$\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_8$

C

$\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_5$

D

$\mathrm{H}_2 \mathrm{SO}_5$

Question 9: Palette 9/65

JEE Advanced 2023 MCQ

Match the reactions (in the given stoichiometry of the reactants) in List-I with one of their products given in List-II and choose the correct option.

List - I	List - II
(P) $\mathrm{P}_2 \mathrm{O}_3+3 \mathrm{H}_2 \mathrm{O} \rightarrow$	(1) $\mathrm{P}(\mathrm{O})\left(\mathrm{OCH}_3\right) \mathrm{Cl}_2$
(Q) $\mathrm{P}_4+3 \mathrm{NaOH}+3 \mathrm{H}_2 \mathrm{O} \rightarrow$	(2) $\mathrm{H}_3 \mathrm{PO}_3$
(R) $\mathrm{PCl}_5+\mathrm{CH}_3 \mathrm{COOH} \rightarrow$	(3) $\mathrm{PH}_3$
(S) $\mathrm{H}_3 \mathrm{PO}_2+2 \mathrm{H}_2 \mathrm{O}+4 \mathrm{AgNO}_3 \rightarrow$	(4) $\mathrm{POCl}_3$
	(5) $\mathrm{H}_3 \mathrm{PO}_4$

A

$\mathrm{P} \rightarrow 2 ; \mathrm{Q} \rightarrow 3 ; \mathrm{R} \rightarrow 1 ; \mathrm{S} \rightarrow 5$

B

$\mathrm{P} \rightarrow 3 ; \mathrm{Q} \rightarrow 5 ; \mathrm{R} \rightarrow 4 ; \mathrm{S} \rightarrow 2$

C

$\mathrm{P} \rightarrow 5 ; \mathrm{Q} \rightarrow 2 ; \mathrm{R} \rightarrow 1 ; \mathrm{S} \rightarrow 3$

D

$\mathrm{P} \rightarrow 2 ; \mathrm{Q} \rightarrow 3 ; \mathrm{R} \rightarrow 4 ; \mathrm{S} \rightarrow 5$

Question 10: Palette 10/65

JEE Advanced 2022 MCQ

The reaction of $\mathrm{HClO}_{3}$ with $\mathrm{HCl}$ gives a paramagnetic gas, which upon reaction with $\mathrm{O}_{3}$ produces

A

$\mathrm{Cl}_{2} \mathrm{O}$

B

$\mathrm{ClO}_{2}$

C

$\mathrm{Cl}_{2} \mathrm{O}_{6}$

D

$\mathrm{Cl}_{2} \mathrm{O}_{7}$

Question 11: Palette 11/65

JEE Advanced 2022 MCQ

The reaction of $\mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}$ and $\mathrm{NaCl}$ in water produces a precipitate that dissolves upon the addition of $\mathrm{HCl}$ of appropriate concentration. The dissolution of the precipitate is due to the formation of

A

$\mathrm{PbCl}_{2}$

B

$\mathrm{PbCl}_{4}$

C

$\left[\mathrm{PbCl}_{4}\right]^{2-}$

D

$\left[\mathrm{PbCl}_{6}\right]^{2-}$

Question 12: Palette 12/65

JEE Advanced 2022 MSQ

The compound(s) which react(s) with $\mathrm{NH}_{3}$ to give boron nitride (BN) is(are)

A

$\mathrm{B}$

B

$\mathrm{B}_{2} \mathrm{H}_{6}$

C

$\mathrm{B}_{2} \mathrm{O}_{3}$

D

$\mathrm{HBF}_{4}$

Question 13: Palette 13/65

JEE Advanced 2021 MSQ

The correct statement(s) related to oxoacids of phosphorous is(are)

A

Upon heating, H₃PO₃ undergoes disproportionation reaction to produce H₃PO₄ and PH₃.

B

While H₃PO₃ can act as reducing agent, H₃PO₄ cannot.

C

H₃PO₃ is a monobasic acid.

D

The H atom of P-H bond in H₃PO₃ is not ionizable in water.

Question 14: Palette 14/65

JEE Advanced 2020 MCQ

A colourless aqueous solution contains nitrates of two metals, X and Y. When it was added to an aqueous solution of NaCl, a white precipitate was formed. This precipitate was found to be partly soluble in hot water to give a residue P and a solution Q. The residue P was soluble in aqueous NH₃ and also in excess sodium thiosulphate. The hot solution Q gave a yellow precipitate with KI. The metals X and Y, respectively, are

A

Ag and Pb

B

Ag and Cd

C

Cd and Pb

D

Cd and Zn

Question 15: Palette 15/65

JEE Advanced 2020 MSQ

With respect to hypochlorite, chlorate and perchlorate ions, choose the correct statement(s).

A

The hypochlorite ion is the strongest conjugate base.

B

The molecular shape of only chlorate ion is influenced by the lone pair of electrons of Cl.

C

The hypochlorite and chlorate ions disproportionate to give rise to identical set of ions.

D

The hypochlorite ion oxidises the sulphite ion.

Question 16: Palette 16/65

JEE Advanced 2019 MSQ

Consider the following reactions (unbalanced).

$Zn + Hot\,conc.\,{H_2}S{O_4}\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{}} G + R + X$

$Zn + conc.\,NaOH\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{}} T + Q$

$G + {H_2}S + N{H_4}OH\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{}} Z\,(a\,precipitate) + X + Y$

Choose the correct option(s).

A

The oxidation state of Zn in T is +1

B

R is a V-shaped molecule

C

Bond order of Q is 1 in its ground state

D

Z is dirty white in colour

Question 17: Palette 17/65

JEE Advanced 2019 MSQ

A tin chloride Q undergoes the following reactions (not balanced)

$Q + C{l^ - } \to X$

$Q + M{e_3}N \to Y$

$Q + CuC{l_2} \to Z + CuCl$

X is a monoanion having pyramidal geometry. Both Y and Z are neutral compounds.

Choose the correct option(s).

A

There is a coordinate bond in Y

B

The central atom in Z has one lone pair of electrons.

C

The oxidation state of the central atom in Z is +2

D

The central atom in X is sp³ hybridised

Question 18: Palette 18/65

JEE Advanced 2018 MSQ

Based on the compounds of group $15$ elements, the correct statement(s) is (are)

A

$B{i_2}{O_5}$ is more basic than ${N_2}{O_5}$

B

$N{F_3}$ is more covalent than $Bi{F_3}$

C

$P{H_3}$ boils at lower temperature than $N{H_3}$

D

The $N-N$ single bond is stronger than the $P-P$ single bond

Question 19: Palette 19/65

JEE Advanced 2018 MSQ

The compounds(s) which generate(s) ${N_2}$ gas upon thermal decomposition below ${300^ \circ }C$ is (are)

A

$N{H_4}N{O_3}$

B

$\left( {N{H_4}} \right){}_2C{r_2}O{}_7$

C

$Ba{\left( {{N_3}} \right)_2}$

D

$M{g_3}{N_2}$

Question 20: Palette 20/65

JEE Advanced 2017 MCQ

$W$ and $X$ are, respectively

A

${O_3}$ and ${P_4}{O_6}$

B

${O_2}$ and ${P_4}{O_6}$

C

${O_2}$ and ${P_4}{O_{10}}$

D

${O_3}$ and ${P_4}{O_{10}}$

Question 21: Palette 21/65

JEE Advanced 2017 MCQ

$Y$ and $Z$ are, respectively

A

${N_2}{O_3}$ and ${H_3}P{O_4}$

B

${N_2}{O_5}$ and $HP{O_3}$

C

${N_2}{O_4}$ and $HP{O_3}$

D

${N_2}{O_4}$ and ${H_3}P{O_3}$

Question 22: Palette 22/65

JEE Advanced 2017 MSQ

Among the following, the correct statement(s) is (are)

A

$Al{\left( {C{H_3}} \right)_3}$ has the three-centre two-electron bonds in its dimeric structure

B

$B{H_3}$ has the three-center two-electron bonds in its dimeric structure

C

$AlC{l_3}$ has the three-center two-electron bonds in its dimeric structure

D

The Lewis acidity of $BC{l_3}$ is greater than that of $AlC{l_3}$

Question 23: Palette 23/65

JEE Advanced 2017 MSQ

The color of the ${X_2}$ molecules of group $17$ elements changes gradually from yellow to violet down the group. This is due to

A

The physical state of ${X_2}$ at room temperature changes from gas to solid down the group

B

Decrease in ionization energy down the group

C

Decrease in ${\pi ^ * } - {\sigma ^ * }$ gap down the group

D

Decrease in HOMO-LUMO gap down the group

Question 24: Palette 24/65

JEE Advanced 2017 MSQ

The correct statement(s) about the oxoacids, $HCl{O_4}$ and $HClO$ is (are)

A

The central atom in both $HCl{O_4}$ and $HClO$ is $s{p^3}$ hybridized

B

$HCl{O_4}$ is more acidic than $HClO$ because of the resonance stabilization of its anion

C

$HCl{O_4}$ is formed in the reaction between $C{l_2}$ and ${H_2}O$

D

The conjugate base of $HCl{O_4}$ is weaker base than ${H_2}O$

Question 25: Palette 25/65

JEE Advanced 2016 MCQ

The increasing order of atomic radii of the following group 13 elements is

A

Al < Ga < In < Tl

B

Ga < Al < In < Tl

C

Al < In < Ga < Tl

D

Al < Ga < Tl < In

Question 26: Palette 26/65

JEE Advanced 2016 MSQ

The nitrogen containing compound produced in the reaction of HNO₃ with P₄O₁₀

A

can also be prepared by reaction of P₄ and HNO₃.

B

is diamagnetic.

C

contains one N$-$N bond.

D

reacts with Na metal producing a brown gas.

Question 27: Palette 27/65

JEE Advanced 2016 MSQ

The crystalline form of borax has.

A

tetranuclear [B₄O₅(OH)₄]^2- unit

B

all boron atoms in the same plane

C

equal number of sp² and sp³ hybridised boron atoms

D

one terminal hydroxide per boron atom

Question 28: Palette 28/65

JEE Advanced 2015 MSQ

The correct statements regarding (i) HClO, (ii) HClO₂, (iii) HClO₃ and (iv) HClO₄ is (are)

A

The number of Cl=O bonds (ii) and (iii) together is two.

B

The number of lone pairs of electrons on Cl in (ii) and (iii) together is three.

C

The hybridization of Cl in (iv) is sp³

D

Amongst (i) to (iv), the strongest acid is (i).

Question 29: Palette 29/65

JEE Advanced 2014 MCQ

The product formed in the reaction of SOCl₂ with white phosphorus is

A

PCl₃

B

SO₂Cl₂

C

SCl₂

D

POCl₃

Question 30: Palette 30/65

JEE Advanced 2014 MCQ

Under ambient conditions, the total number of gases released as products in the final step of the reaction scheme shown below is

A

0

B

1

C

2

D

3

Question 31: Palette 31/65

JEE Advanced 2014 MSQ

The correct statement(s) for orthoboric acid is/are

A

it behaves as a weak acid in water due to self ionisation

B

acidity of its aqueous solution increases upon addition of ethylene glycol

C

it has a three dimensional structure due to hydrogen bonding

D

it is a weak electrolyte in water

Question 32: Palette 32/65

JEE Advanced 2013 MCQ

P and Q, respectively, are the sodium salts of

A

Hypochlorous and chloric acids.

B

Hypochlorous and chlorous acids.

C

Chloric and perchloric acids.

D

Chloric and hypochlorous acids.

Question 33: Palette 33/65

JEE Advanced 2013 MCQ

R, S and T respectively, are

A

SO₂Cl₂, PCl₅ and H₃PO₄

B

SO₂Cl₂, PCl₃ and H₃PO₃

C

SOCl₂, PCl₃ and H₃PO₂

D

SOCl₂, PCl₅ and H₃PO₄

Question 34: Palette 34/65

JEE Advanced 2013 MCQ

The unbalanced chemical reactions given in List I show missing reagent or condition (?) which are provided in List II. Match List I with List II and select the correct answer using the code given below the lists :

	List I		List II
P.	$Pb{O_2} + {H_2}S{O_4}\buildrel ? \over \longrightarrow PbS{O_4} + {O_2} + Other\,products$	1.	NO
Q.	$N{a_2}{S_2}{O_3} + {H_2}O\buildrel ? \over \longrightarrow NaHS{O_4} + Other\,products$	2.	${I_2}$
R.	${N_2}{H_4}\buildrel ? \over \longrightarrow {N_2} + Other\,products$	3.	Warm
S.	$Xe{F_2}\buildrel ? \over \longrightarrow Xe + Other\,products$	4.	$C{l_2}$

A

P-4, Q-2, R-3, S-1

B

P-3, Q-2, R-1, S-4

C

P-1, Q-4, R-2, S-3

D

P-3, Q-4, R-2, S-1

Question 35: Palette 35/65

JEE Advanced 2013 MCQ

Concentrated nitric acid, upon long standing, turns yellow-brown due to the formation of

A

NO

B

NO₂

C

N₂O

D

N₂O₄

Question 36: Palette 36/65

JEE Advanced 2013 MSQ

The correct statement(s) about O₃ is(are)

A

O-O bond lengths are equal.

B

Thermal decomposition of O₃ is endothermic.

C

O₃ is diamagnetic in nature.

D

O₃ has a bent structure.

Question 37: Palette 37/65

JEE Advanced 2012 MCQ

The reaction of white phosphorous with aqueous NaOH gives phosphine along with another phosphorus containing compound. The reaction type; the oxidation states of phosphorus in phosphine and the other product are, respectively,

A

redox reaction; $-$3 and $-$5

B

redox reaction; +3 and +5

C

disproportionation reaction; $-$3 and +1

D

disproportionation reaction; $-$3 and +3

Question 38: Palette 38/65

JEE Advanced 2012 MCQ

Bleaching powder contains a salt of an oxoacid as one of its components. The anhydride of that oxoacid is

A

Cl₂O

B

Cl₂O₇

C

ClO₂

D

Cl₂O₆

Question 39: Palette 39/65

JEE Advanced 2012 MCQ

25 mL of household bleach solution was mixed with 30 mL of 0.50 M KI and 10 mL of 4 N acetic acid. In the titration of the liberated iodine, 48 mL of 0.25 N Na₂S₂O₃ was used to reach the end point. The molarity of the household bleach solution is

A

0.48 M

B

0.96 M

C

0.24 M

D

0.024 M

Question 40: Palette 40/65

JEE Advanced 2012 MCQ

Which ordering of compounds is according to the decreasing order of the oxidation state of nitrogen?

A

HNO₃, NO, NH₄Cl, N₂

B

HNO₃, NO, N₂, NH₄Cl

C

HNO₃, NH₄Cl, NO, N₂

D

NO, HNO₃, NH₄Cl, N₂

Question 41: Palette 41/65

JEE Advanced 2012 MSQ

With respect to graphite and diamond, which of the statement(s) given below is(are) correct?

A

Graphite is harder than diamond.

B

Graphite has higher electrical conductivity than diamond.

C

Graphite has higher thermal conductivity than diamond.

D

Graphite has higher C-C bond order than diamond.

Question 42: Palette 42/65

JEE Advanced 2012 MSQ

Which of the following hydrogen halides reacts with AgNO₃(aq.) to give a precipitate that dissolves in Na₂S₂O₃ (aq.) ?

A

HCl

B

HF

C

HBr

D

HI

Question 43: Palette 43/65

JEE Advanced 2011 MCQ

Extra very pure N₂ can be obtained by heating

A

NH₃ with CuO

B

NH₄NO₃

C

(NH₄)₂CrO₇

D

Ba(N₃)₂

Question 44: Palette 44/65

JEE Advanced 2010 MCQ

All the compounds listed in Column I react with water. Match the result of the respective reactions with the appropriate options listed in Column II.

Column I	Column II
(A) (CH3)2SiCl2	(P) Hydrogen halide formation
(B) XeF4	(Q) Redox reaction
(C) Cl2	(R) Reacts with glass
(D) VCl5	(S) Polymerisation
	(T) O2 formation

A

(A)→(P); (B)→(P), (Q), (R), (T); (C)→(P); (D)→(P)

B

(A)→(P), (S); (B)→(P), (Q), (R), (T); (C)→(P), (Q); (D)→(P)

C

(A)→(P), (S); (B)→(P), (R), (T); (C)→(P), (Q); (D)→(P)

D

(A)→(P), (S); (B)→(P), (Q), (R); (C)→(P), (Q); (D)→(P)

Question 45: Palette 45/65

JEE Advanced 2009 MCQ

Match each of the reactions given in Column I with the corresponding product(s) given in Column II:

	Column I		Column II
(A)	$\mathrm{Cu+dil.~HNO_3}$	(P)	$\mathrm{NO}$
(B)	$\mathrm{Cu+conc.~HNO_3}$	(Q)	$\mathrm{NO_2}$
(C)	$\mathrm{Zn+dil.~HNO_3}$	(R)	$\mathrm{N_2O}$
(D)	$\mathrm{Zn+conc.~HNO_3}$	(S)	$\mathrm{Cu(NO_3)_2}$
		(T)	$\mathrm{Zn(NO_3)_2}$

A

(A)$\to$(P), (S); (B)$\to$(R), (S); (C)$\to$(R), (T); (D)$\to$(R), (T)

B

(A)$\to$(T), (S); (B)$\to$(P), (S); (C)$\to$(R), (T); (D)$\to$(S), (T)

C

(A)$\to$(P), (S); (B)$\to$(Q), (S); (C)$\to$(R), (T); (D)$\to$(Q), (T)

D

(A)$\to$(R), (S); (B)$\to$(Q), (S); (C)$\to$(R), (T); (D)$\to$(S), (T)

Question 46: Palette 46/65

JEE Advanced 2009 MCQ

The reaction of P$_4$ with X leads selectively to P$_4$O$_6$. The X is

A

Dry O$_2$.

B

A mixture of O$_2$ and N$_2$.

C

Moist O$_2$.

D

O$_2$ in the presence of aqueous NaOH.

Question 47: Palette 47/65

JEE Advanced 2009 MSQ

In the reaction

$\mathrm{2X+B_2H_6\to[BH_2(X)_2]^+[BH_4]^-}$

the amine(s) X is(are) :

A

NH$_3$

B

CH$_3$NH$_2$

C

(CH$_3$)$_2$NH

D

(CH$_3$)$_3$N

Question 48: Palette 48/65

JEE Advanced 2009 MSQ

The nitrogen oxide(s) that contain(s) N-N bond(s) is(are)

A

N$_2$O

B

N$_2$O$_3$

C

N$_2$O$_4$

D

N$_2$O$_5$

Question 49: Palette 49/65

JEE Advanced 2008 MCQ

Statement 1 : Pb$^{4+}$ compounds are stronger oxidising agents than Sn$^{4+}$ compounds.

and

Statement 2 : The higher oxidation states for the group 14 elements are more stable for the heavier members of the group due to 'inert pair effect'.

A

Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1.

B

Statement 1 is True, Statement 2 is True; Statement 2 is NOT correct explanation for Statement 1.

C

Statement 1 is True, Statement 2 is False.

D

Statement 1 is False, Statement 2 is True.

Question 50: Palette 50/65

JEE Advanced 2008 MCQ

Among the following, the correct statement is:

A

Phosphates have no biological significance in humans.

B

Between nitrates and phosphates, phosphates are less abundant in earth's crust.

C

Between nitrates and phosphates, nitrates are less abundant in earth's crust.

D

Oxidation of nitrates is possible in soil.

Question 51: Palette 51/65

JEE Advanced 2008 MCQ

Among the following, the correct statement is :

A

Between NH$_3$ and PH$_3$, NH$_3$ is better electron donor because the lone pair of electrons occupies spherical 's' orbital and is less directional.

B

Between NH$_3$ and PH$_3$, PH$_3$ is a better electron donor because the lone pair of electrons occupies sp$^3$ orbital and is more directional.

C

Between NH$_3$ and PH$_3$, NH$_3$ is a better electron donor because the lone pair of electrons occupies sp$^3$ orbital and is more directional.

D

Between NH$_3$ and PH$_3$, PH$_3$ is better electron donor because the lone pair of electrons occupies spherical 's' orbital and is less directional.

Question 52: Palette 52/65

JEE Advanced 2008 MCQ

White phosphorus on reaction with NaOH gives PH$_3$ as one of the products. This is a:

A

dimerisation reaction

B

disproportionation reaction

C

condensation reaction

D

precipitation reaction

Question 53: Palette 53/65

JEE Advanced 2008 MSQ

A solution of colourless salt H on boiling with excess NaOH produces a non-flammable gas. The gas evolution ceases after sometime. Upon addition of Zn dust to the same solution, the gas evolution restarts. The colourless salt(s) H is(are):

A

NH$_4$NO$_3$

B

NH$_4$NO$_2$

C

NH$_4$Cl

D

(NH$_4$)$_2$SO$_4$

Question 54: Palette 54/65

JEE Advanced 2007 MCQ

STATEMENT-1 : Band gap in germanium is small.

STATEMENT-2 : The energy gap of each germanium atomic energy level is infinitesimally small.

A

Statement - 1 is True, Statement - 2 is True; Statement - 2 is a correct explanation for Statement - 1

B

Statement - 1 is True, Statement - 2 is True; Statement - 2 is not a correct explanation for Statement - 1

C

Statement - 1 is True, Statement - 2 is False

D

Statement - 1 is False, Statement - 2 is True

Question 55: Palette 55/65

JEE Advanced 2007 MCQ

Statement-1 : Molecules that are not superimposable on their mirror images are chiral.

Statement-2 : All chiral molecules have chiral centres.

A

Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1

B

Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1

C

Statement-1 is True, Statement-2 is False

D

Statement-1 is False, Statement-2 is True

Question 56: Palette 56/65

JEE Advanced 2007 MCQ

The percentage of p-character in the orbitals forming P-P bonds in P$_4$ is

A

25

B

33

C

50

D

75

Question 57: Palette 57/65

JEE Advanced 2007 MCQ

Statement 1 : In water, orthoboric acid behaves as a weak monobasic acid.

Statement 2 : In water, orthoboric acid acts as a proton donor.

A

Statement 1 is True, Statement 2 is True, Statement 2 is a CORRECT explanation for Statement 1

B

Statement 1 is True, Statement 2 is True, Statement 2 is NOT a CORRECT explanation for Statement 1

C

Statement 1 is True, Statement 2 is False

D

Statement 1 is False, Statement 2 is True

Question 58: Palette 58/65

JEE Advanced 2007 MCQ

Argon is used in arc welding because of its

A

low reactivity with metal

B

ability to lower the melting point of metal

C

flammability

D

high calorific value

Question 59: Palette 59/65

JEE Advanced 2007 MCQ

The structure of XeO$_3$

A

linear

B

planar

C

pyramidal

D

T-shaped

Question 60: Palette 60/65

JEE Advanced 2007 MCQ

XeF$_4$ and XeF$_6$ are expected to be

A

oxidizing

B

reducing

C

unreactive

D

strongly basic

Question 61: Palette 61/65

JEE Advanced 2006 MCQ

$ \mathrm{B}(\mathrm{OH})_3+\mathrm{NaOH} \quad \mathrm{NaBO}_2+\mathrm{Na}\left[\mathrm{~B}(\mathrm{OH})_4\right] $$+\mathrm{H}_2 \mathrm{O}$

How can this reaction be made to proceed in forward direction?

A

addition of cis -1,2-diol

B

addition of borax

C

addition of trans $-1,2-$ diol

D

addition of $\mathrm{Na}_2 \mathrm{HPO}_4$

Question 62: Palette 62/65

JEE Advanced 2006 MCQ

$ \text { Match the Column I with Column II : } $

Column I		Column II
(A)	$ \mathrm{Bi}^{3+} \rightarrow(\mathrm{BiO})^{+} $	(P)	Heat
(B)	$ \left[\mathrm{AlO}_2\right]^{-} \rightarrow \mathrm{Al}(\mathrm{OH})_3 $	(Q)	Hydrolysis
(C)	$ \mathrm{SiO}_4^{4-} \rightarrow \mathrm{Si}_2 \mathrm{O}_7^{6-} $	(R)	Acidification
(D)	$ \left(\mathrm{B}_4 \mathrm{O}_7^{2-}\right) \rightarrow\left[\mathrm{B}(\mathrm{OH})_3\right] $	(S)	Dilution by water

A

$ [\mathbf{A} \rightarrow(\mathbf{Q}, \mathrm{R}) ; \mathbf{B} \rightarrow(\mathbf{R}) ; \mathbf{C} \rightarrow(\mathbf{P}) ; \mathrm{D} \rightarrow(\mathrm{R})] .$

B

$ [\mathbf{A} \rightarrow(\mathbf{Q}, \mathrm{R}) ; \mathbf{B} \rightarrow(\mathbf{R}) ; \mathbf{C} \rightarrow(\mathbf{P}) ; \mathrm{D} \rightarrow(\mathrm{Q}, \mathrm{R})] .$

C

$ [\mathbf{A} \rightarrow(\mathbf{Q}) ; \mathbf{B} \rightarrow(\mathbf{R}) ; \mathbf{C} \rightarrow(\mathbf{P}) ; \mathrm{D} \rightarrow(\mathrm{Q})] .$

D

$ [\mathbf{A} \rightarrow(\mathbf{Q}) ; \mathbf{B} \rightarrow(\mathbf{R}) ; \mathbf{C} \rightarrow(\mathbf{P}) ; \mathrm{D} \rightarrow(\mathrm{Q}, \mathrm{R})] .$

Question 63: Palette 63/65

JEE Advanced 2006 MCQ

The species present in solution when CO₂ is dissolved in water are

A

CO₂, H₂CO₃, $HCO_3^-$, $CO_3^{2-}$

B

$H_2CO_3$, $CO_3^{2-}$

C

$CO_3^{2-}$, $HCO_3^-$

D

CO₂, H₂CO₃

Question 64: Palette 64/65

JEE Advanced 2002 MCQ

Specify the coordination geometry around and hybridisation of N and B atoms in a 1 : 1 complex of BF₃ and NH₃

A

N : tetrahedral, sp³; B : tetrahedral, sp³

B

N : pyramidal, sp³; B : pyramidal, sp³

C

N : pyramidal, sp³; B : planar, sp²

D

N : pyramidal, sp³; B : tetrahedral, sp³

Question 65: Palette 65/65

JEE Advanced 1999 MCQ

The oxidation number of sulphur in S₈,S₂F₂,H₂S respectively, are

A

0, +1 and -2

B

+2, +1 and -2

C

0, +1 and +2

D

-2, +1 and -2