List of top Chemistry Questions asked in JEE Advanced

The compound(s) having peroxide linkage is(are)
The option(s) with correct sequence of reagents for the conversion of P to Q is(are)
The option(s) with correct sequence of reagents for the conversion of P to Q is
An aqueous solution of hydrazine (N2H4) is electrochemically oxidized by O2, thereby releasing chemical energy in the form of electrical energy. One of the products generated from the electrochemical reaction is N2(g).
Choose the correct statement(s) about the above process
The species formed on fluorination of phosphorus pentachloride in a polar organic solvent are
In the following reaction sequence, the major product Q is
\(\text{L-Glucose}\xrightarrow[ii)Cr_2,775K,10-20 \text{atm}]{i)HI, \Delta}P\xrightarrow[UV]{Cl_2(excess)}Q\)
In a metal deficient oxide sample, MXY2O4(M and Y are metals), M is present in both +2 and +3 oxidation states and Y is in +3 oxidation state. If the fraction of M2+ ions present in M is \(\frac{1}{3}\), the value of X is______.
According to Bohr’s model, the highest kinetic energy is associated with the electron in the
List-I contains various reaction sequences and List-II contains different phenolic compounds. Match each entry in List-I with the appropriate entry in List-II and choose the correct option.

List I

List II

(P)List-I contains various reaction sequences(1)
List-II contains different phenolic compounds
(Q)List-I contains various reaction sequences(2)
List-II contains different phenolic compounds
(R)List-I contains various reaction sequences(3)
List-II contains different phenolic compounds
(S)List-I contains various reaction sequences(4)
List-II contains different phenolic compounds
(5)
List-II contains different phenolic compounds
List-I contains various reaction sequences and List-II contains the possible products. Match each entry in List-I with the appropriate entry in List-II and choose the correct option.

List I

List II

(P)List-I contains various reaction sequences(1)
List-II contains the possible products
(Q)List-I contains various reaction sequences(2)
List-II contains the possible products
(R)List-I contains various reaction sequences(3)
List-II contains the possible products
(S)List-I contains various reaction sequences(4)
List-II contains the possible products
(5)
List-II contains the possible products
Based on VSEPR model, match the xenon compounds given in List-I with the corresponding geometries and the number of lone pairs on xenon given in List-II and choose the correct option.

List I

List II

(P)XeF2(1)Trigonal bipyramidal and two lone pair of electrons
(Q)XeF4(2)Tetrahedral and one lone pair of electrons
(R)XeO3(3)Octahedral and two lone pair of electrons
(S)XeO3F2(4)Trigonal bipyramidal and no lone pair of electrons
(5)Trigonal bipyramidal and three lone pair of electrons
In a conductometric titration, small volume of titrant of higher concentration is added stepwise to a larger volume of titrate of much lower concentration, and the conductance is measured after each addition.
The limiting ionic conductivity (Λ0) values (in mS m2mol−1 ) for different ions in aqueous solutions are given below:
IonsAg+K+Na+H+\(\text{NO}_{3}^{-}\)Cl-\(\text{SO}^{2-}_{4}\)OH-CH3COO-
\(\Lambda_0\)6.27.45.035.07.27.616.019.94.1
For different combinations of titrates and titrants given in List-I, the graphs of 'conductance' versus ‘volume of titrant’ are given in List-II.
Match each entry in List-I with the appropriate entry in List-II and choose the correct option.
 

List I

List II

(P)Titrate: KCl
Titrant: AgNO3		(1)
the graphs of 'conductance' versus ‘volume of titrant’
(Q)Titrate: AgNO3
Titrant: KCl		(2)
the graphs of 'conductance' versus ‘volume of titrant’
(R)Titrate: NaOH
Titrant: HCl		(3)
the graphs of 'conductance' versus ‘volume of titrant’
(S)Titrate: NaOH
Titrant: CH3COOH		(4)
the graphs of 'conductance' versus ‘volume of titrant’
 (5)
the graphs of 'conductance' versus ‘volume of titrant’
The option(s) in which at least three molecules follow Octet Rule is(are)
Reaction of iso-propylbenzene with O2 followed by the treatment with H3O+ forms phenol and a by-product P. Reaction of P with 3 equivalents of Cl2 gives compound Q. Treatment of Q with Ca(OH)2 produces compound R and calcium salt S.
The correct statement(s) regarding P, Q, R and S is(are)
Among the following, the correct statement(s) for electrons in an atom is(are)

Among the following options, select the option in which each complex in 
Set-I shows geometrical isomerism and the two complexes in 
Set-II are ionization isomers of each other.
[en = H2NCH2CH2NH2]

Aspartame, an artificial sweetener, is a dipeptide aspartyl phenylalanine methyl ester. The structure of aspartame is
Aspartame, an artificial sweetener, is a dipeptide aspartyl phenylalanine methyl ester.
At room temperature, disproportionation of an aqueous solution of in situ generated nitrous acid (HNO2) gives the species
A closed vessel contains 10 g of an ideal gas X at 300 K, which exerts 2 atm pressure. At the same temperature, 80 g of another ideal gas Y is added to it and the pressure becomes 6 atm. The ratio of root mean square velocities of X and Y at 300 K is
Among [Co(CN)4]4−, [Co(CO)3(NO)], XeF4, [PCl4 ]+, [PdCl4 ]2− , [ICl4 ]− , [Cu(CN)4]3− and P4 the total number of species with tetrahedral geometry is _____.
For a double strand DNA, one strand is given below:
For a double strand DNA, one strand is given below:
The amount of energy required to split the double strand DNA into two single strands is _____ kcal mol−1.
[Given: Average energy per H-bond for A-T base pair = 1.0 kcal mol−1, G-C base pair = 1.5 kcal mol−1, and A-U base pair = 1.25 kcal mol−1. Ignore electrostatic repulsion between the phosphate groups.]
Among V(CO)6, Cr(CO)5, Cu(CO)3, Mn(CO)5, Fe(CO)5, [Co(CO)3]3-, [Cr(CO)4]4-, and Ir(CO)3, the total number of species isoelectronic with Ni(CO)4 is _________.
[Given, atomic number: V = 23, Cr=24, Mn 25, Fe 26, Co 27, Ni 28, Cu = 29, Ir = 77]
For a double-strand DNA, one strand is given below: The amount of energy required to split the double-strand DNA into two single strands is . kcal mol........\(^{-1}\). [Given: Average energy per H-bond for A-T base pair = 1 kcal mol\(^{-1}\), G-C base pair = 1.5 kcal mol\(^{-1}\), and A-U base pair = 1.25 kcal mol\(^{-1}\). Ignore electrostatic repulsion between the phosphate groups]
A sample initially contains only U-238 isotope of uranium. With time, some of the U-238 radioactively decays into Pb-206 while the rest remains undisintegrated. When the age of the sample is \( P \times 10^8 \) years, the ratio of the mass of Pb-206 to that of U-238 in the sample is found to be 7. The value of \( P \) is: \[ \text{[Given: Half-life of U-238 = \(4.5 \times 10^9\) years; \(\log_e2 = 0.693\)]} \]
A sample initially contains only U-238 isotope of uranium. With time, some of the U-238 radioactively decays into Pb-206 while the rest of it remains undisintegrated.
When the age of the sample is P x108 years, the ratio of mass of Pb-206 to that of U-238 in the sample is found to be 7. The value of P is _____.
[Given: Half-life of U-238 is 4.5 x109 years; loge2 = 0.693]
Vessel-1 contains w2 g of a non-volatile solute X dissolved in w1 g of water. Vessel-2 contains w2 g of another non-volatile solute Y dissolved in w1 g of water. Both the vessels are at the same temperature and pressure. The molar mass of X is 80% of that of Y. The van’t Hoff factor for X is 1.2 times of that of Y for their respective concentrations.
The elevation of boiling point for solution in Vessel-1 is _____ % of the solution in Vessel-2.