JEE Main 2023 (Online) 10th April Evening Shift

The correct order for acidity of the following hydroxyl compound is :
A. \(\mathrm{CH}_{3} \mathrm{OH}\)
B. \(\left(\mathrm{CH}_{3}\right)_{3} \mathrm{COH}\)
C.
D.
E.
Choose the correct answer from the options given below:

Incorrect method of preparation for alcohols from the following is:

The decreasing order of hydride affinity for following carbocations is:

Choose the correct answer from the options given below:

The number of molecules from the following which contain only two lone pair of electrons is ________
$$\mathrm{H}_{2} \mathrm{O}, \mathrm{N}_{2}, \mathrm{CO}, \mathrm{XeF}_{4}, \mathrm{NH}_{3}, \mathrm{NO}, \mathrm{CO}_{2}, \mathrm{~F}_{2}$...

\(\mathrm{A}(g) \rightleftharpoons 2 \mathrm{~B}(g)+\mathrm{C}(g)\)
For the given reaction, if the initial pressure is \(450 \mathrm{~mm} ~\mathrm{Hg}\) and the pressure at time \(\mathrm{t}\) is \(720 \mathrm{~mm} ~\mathrm{Hg}\) at a const...

The number of incorrect statement/s from the following is ___________
A. The successive half lives of zero order reactions decreases with time.
B. A substance appearing as reactant in the chemical equation may not affect the rate of reactio...

The reaction used for preparation of soap from fat is :

The major product 'P' formed in the given reaction is:

In the reaction given below:

The product 'X' is:

The correct order of the number of unpaired electrons in the given complexes is
A. \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}\)
B. \(\left[\mathrm{Fe} \mathrm{F}_{6}\right]^{3-}\)
C. \(\left[\mathrm{CoF}_{6}\right]^{3-}\)
D. $$\left.[...

Match List I with List II

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...

For a metal ion, the calculated magnetic moment is \(4.90 ~\mathrm{BM}\). This metal ion has ___________ number of unpaired electrons.

The specific conductance of \(0.0025 ~\mathrm{M}\) acetic acid is \(5 \times 10^{-5} \mathrm{~S} \mathrm{~cm}^{-1}\) at a certain temperature. The dissociation constant of acetic acid is __________ \(\times ~10^{-7}\) (Nearest integer)
Cons...

The delicate balance of \(\mathrm{CO}_{2}\) and \(\mathrm{O}_{2}\) is NOT disturbed by :

Given below are two statements: one is labelled as Assertion \(\mathbf{A}\) and the other is labelled as Reason \(\mathbf{R}\)
Assertion A : Physical properties of isotopes of hydrogen are different.
Reason R : Mass difference between isoto...

Gibbs energy vs T plot for the formation of oxides is given below.

For the given diagram, the correct statement is -

The difference in the oxidation state of \(\mathrm{Xe}\) between the oxidised product of \(\mathrm{Xe}\) formed on complete hydrolysis of \(\mathrm{XeF}_{4}\) is ___________

Given below are two statements: one is labelled as Assertion \(\mathbf{A}\) and the other is labelled as Reason \(\mathbf{R}\)
Assertion A : The energy required to form \(\mathrm{Mg}^{2+}\) from \(\mathrm{Mg}\) is much higher than that requ...

Buna-S can be represented as:

In Carius tube, an organic compound '\(\mathrm{X}\)' is treated with sodium peroxide to form a mineral acid 'Y'.
The solution of \(\mathrm{BaCl}_{2}\) is added to '\(\mathrm{Y}\)' to form a precipitate 'Z'. 'Z' is used for the quantitative ...

In alkaline medium, the reduction of permanganate anion involves a gain of __________ electrons.

The correct order of metallic character is :

Number of water molecules in washing soda and soda ash respectively are :

The correct relationships between unit cell edge length '\(a\)' and radius of sphere '\(r\)' for face-centred and body-centred cubic structures respectively are :

An aqueous solution of volume \(300 \mathrm{~cm}^{3}\) contains \(0.63 \mathrm{~g}\) of protein. The osmotic pressure of the solution at \(300 \mathrm{~K}\) is 1.29 mbar. The molar mass of the protein is ___________ $$\mathrm{g} ~\mathrm{mo...

Given below are two statements: one is labelled as Assertion \(\mathbf{A}\) and the other is labelled as Reason \(\mathbf{R}\)
Assertion A : \(3.1500 \mathrm{~g}\) of hydrated oxalic acid dissolved in water to make \(250.0 \mathrm{~mL}\) so...

Match List I with List II

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...

The electron in the \(\mathrm{n}^{\text {th }}\) orbit of \(\mathrm{Li}^{2+}\) is excited to \((\mathrm{n}+1)\) orbit using the radiation of energy \(1.47 \times 10^{-17} \mathrm{~J}\) (as shown in the diagram). The value of \(\mathrm{n}\)...

Ferric chloride is applied to stop bleeding because -

The number of endothermic process/es from the following is ______________.
A. \(\mathrm{I}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{I}(\mathrm{g})\)
B. \(\mathrm{HCl}(\mathrm{g}) \rightarrow \mathrm{H}(\mathrm{g})+\mathrm{Cl}(\mathrm{g})\)
C....