JEE Main 2022 (Online) 25th July Evening Shift

What is the major product of the following reaction?

\(C{H_3} - C{H_2} - CN\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{Ether}^{C{H_3}MgBr}} A\buildrel {{H_3}{O^ + }} \over \longrightarrow B\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{HCl}^{Zn - Hg}} C\)
The correct structure of ...

Arrange the following in decreasing acidic strength.

The separation of two coloured substances was done by paper chromatography. The distances travelled by solvent front, substance A and substance B from the base line are 3.25 cm, 2.08 cm and 1.05 cm, respectively. The ratio of Rf values of A...

The total number of monobromo derivatives formed by the alkanes with molecular formula C5H12 is (excluding stereo isomers) __________.

Glycosidic linkage between C1 of \(\alpha\)-glucose and C2 of \(\beta\)-fructose is found in

Match List I with List II:

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The sum of number of lone pairs of electrons present on the central atoms of XeO3, XeOF4 and XeF6, is ______________

For the decomposition of azomethane.
CH3N2CH3(g) \(\to\) CH3CH3(g) + N2(g), a first order reaction, the variation in partial pressure with time at 600 K is given as

The half life of the reaction is __________ \(\times\) 10\(-\)5 s. [Neares...

Some drugs bind to a site other than the active site of an enzyme. This site is known as

The correct order of energy of absorption for the following metal complexes is :
A : [Ni(en)3]2+ , B : [Ni(NH3)6]2+ , C : [Ni(H2O)6]2+

The molar conductivity of a conductivity cell filled with 10 moles of 20 mL NaCl solution is \({\Lambda _{m1}}\) and that of 20 moles another identical cell heaving 80 mL NaCl solution is \({\Lambda _{m2}}\). The conductivities exhibited by...

The spin-only magnetic moment value of M3+ ion (in gaseous state) from the pairs Cr3+ / Cr2+, Mn3+ / Mn2+, Fe3+ / Fe2+ and Co3+ / Co2+ that has negative standard electrode potential, is ____________ B.M. [Nearest integer]

A sealed flask with a capacity of 2 dm3 contains 11 g of propane gas. The flask is so weak that it will burst if the pressure becomes 2 MPa. The minimum temperature at which the flask will burst is ___________ \(^\circ\)C. [Nearest integer]...

Major product of the following reaction is

High purity (> 99.95%) dihydrogen is obtained by :

\({K_{{a_1}}}\), \({K_{{a_2}}}\) and \({K_{{a_3}}}\) are the respective ionization constants for the following reactions (a), (b) and (c).
(a) $${H_2}{C_2}{O_4} \mathbin{\lower.3ex\hbox{$\buildrel\textstyle\rightarrow\over
{\smash{\leftarr...

Given below are two statements.
Statement I : Pig iron is obtained by heating cast iron with scrap iron.
Statement II : Pig iron has a relatively lower carbon content than that of cast iron.
In the light of the above statements, choose the ...

The total number of acidic oxides from the following list is
NO, N2O, B2O3, N2O5, CO, SO3, P4O10

Match List I with List II:

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The first ionization enthalpies of Be, B, N and O follow the order

Match List I with List II :

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In base vs. acid titration, at the end point methyl orange is present as

The correct order of density is :

Two solutions A and B are prepared by dissolving 1 g of non-volatile solutes X and Y, respectively in 1 kg of water. The ratio of depression in freezing points for A and B is found to be 1 : 4. The ratio of molar masses of X and Y is

56.0 L of nitrogen gas is mixed with excess hydrogen gas and it is found that 20 L of ammonia gas is produced. The volume of unused nitrogen gas is found to be _________ L.

A sample of 4.5 mg of an unknown monohydric alcohol, R-OH was added to methylmagnesium iodide. A gas is evolved and is collected and its volume measured to be 3.1 mL. The molecular weight of the unknown alcohol is __________ g/mol. [Nearest...

When the excited electron of a H atom from n = 5 drops to the ground state, the maximum number of emission lines observed are _____________.

For micelle formation, which of the following statements are correct?
A. Micelle formation is an exothermic process.
B. Micelle formation is an endothermic process.
C. The entropy change is positive.
D. The entropy change is negative.

While performing a thermodynamics experiment, a student made the following observations.
HCl + NaOH \(\to\) NaCl + H2O \(\Delta\)H = \(-\)57.3 kJ mol\(-\)1
CH3COOH + NaOH \(\to\) CH3COONa + H2O \(\Delta\)H = \(-\)55.3 kJ mol\(-\)1
The entha...