JEE Main 2023 (Online) 30th January Morning Shift

What is the correct order of acidity of the protons marked \(\mathrm{A}-\mathrm{D}\) in the given compounds ?

Which of the following compounds would give the following set of qualitative analysis ?
(i) Fehling's Test : Positive
(ii) Na fusion extract upon treatment with sodium nitroprusside gives a blood red colour but not prussian blue.

A trisubstituted compound '\(\mathrm{A}\)', \(\mathrm{C}_{10} \mathrm{H}_{12} \mathrm{O}_{2}\) gives neutral \(\mathrm{FeCl}_{3}\) test positive. Treatment of compound 'A' with \(\mathrm{NaOH}\) and \(\mathrm{CH}_{3} \mathrm{Br}\) gives $$\...

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Ketoses give Seliwanoff's test faster than Aldoses.
Reason (R) : Ketoses undergo \(\beta\)-elimination followed by fo...

For \(\mathrm{OF}_{2}\) molecule consider the following :
A. Number of lone pairs on oxygen is 2 .
B. FOF angle is less than \(104.5^{\circ}\).
C. Oxidation state of \(\mathrm{O}\) is \(-2\).
D. Molecule is bent '\(\mathrm{V}\)' shaped.
E. ...

Match List I with List II

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...

If compound A reacts with B following first order kinetics with rate constant \(2.011 \times 10^{-3} \mathrm{~s}^{-1}\). The time taken by \(\mathrm{A}\) (in seconds) to reduce from \(7 \mathrm{~g}\) to \(2 \mathrm{~g}\) will be ___________...

Amongst the following compounds, which one is an antacid?

Benzyl isocyanide can be obtained by :
A.
B.
C.
D.
Choose the correct answer from the options given below :

To inhibit the growth of tumours, identify the compounds used from the following :
A. EDTA
B. Coordination Compounds of Pt
C. D - Penicillamine
D. Cis - Platin
Choose the correct answer from the option given below :

Which of the following is correct order of ligand field strength?

During the qualitative analysis of \(\mathrm{SO}_{3}^{2-}\) using dilute \(\mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{SO}_{2}\) gas is evolved which turns \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) solution (acidified with dilute $$\mat...

The number of electrons involved in the reduction of permanganate to manganese dioxide in acidic medium is _____________.

Consider the cell
$$\mathrm{Pt}_{(\mathrm{s})}\left|\mathrm{H}_{2}(\mathrm{~g}, 1 \mathrm{~atm})\right| \mathrm{H}^{+}(\mathrm{aq}, 1 \mathrm{M})|| \mathrm{Fe}^{3+}(\mathrm{aq}), \mathrm{Fe}^{2+}(\mathrm{aq}) \mid \operatorname{Pt}(\mathrm{...

Formation of photochemical smog involves the following reaction in which \(\mathrm{A}, \mathrm{B}\) and \(\mathrm{C}\) are respectively.
$$
\begin{aligned}
& \text { i. } \mathrm{NO}_{2} \stackrel{\mathrm{h} v}{\longrightarrow} \mathrm{A}+\...

A \(300 \mathrm{~mL}\) bottle of soft drink has \(0.2 ~\mathrm{M}~ \mathrm{CO}_{2}\) dissolved in it. Assuming \(\mathrm{CO}_{2}\) behaves as an ideal gas, the volume of the dissolved \(\mathrm{CO}_{2}\) at \(\mathrm{STP}\) is ____________ ...

Match List I with List II

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...

The major products 'A' and 'B', respectively, are

\(600 \mathrm{~mL}\) of \(0.01~\mathrm{M} ~\mathrm{HCl}\) is mixed with \(400 \mathrm{~mL}\) of \(0.01~\mathrm{M} ~\mathrm{H}_{2} \mathrm{SO}_{4}\). The \(\mathrm{pH}\) of the mixture is ___________ \(\times 10^{-2}\). (Nearest integer)
[Gi...

In the extraction of copper, its sulphide ore is heated in a reverberatory furnace after mixing with silica to:

Match List I with List II

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...

Caprolactam when heated at high temperature in presence of water, gives

Lithium aluminium hydride can be prepared from the reaction of :

The alkaline earth metal sulphate(s) which are readily soluble in water is/are :
A. \(\mathrm{BeSO}_{4}\)
B. \(\mathrm{MgSO}_{4}\)
C. \(\mathrm{CaSO}_{4}\)
D. \(\mathrm{SrSO}_{4}\)
E. \(\mathrm{BaSO}_{4}\)
Choose the correct answer from the...

In the wet tests for identification of various cations by precipitation, which transition element cation doesn't belong to group IV in qualitative inorganic analysis?

A solution containing \(2 \mathrm{~g}\) of a non-volatile solute in \(20 \mathrm{~g}\) of water boils at \(373.52 \mathrm{~K}\). The molecular mass of the solute is ___________ \(\mathrm{g} ~\mathrm{mol}^{-1}\). (Nearest integer)
Given, wat...

Some amount of dichloromethane \(\left(\mathrm{CH}_{2} \mathrm{Cl}_{2}\right)\) is added to \(671.141 \mathrm{~mL}\) of chloroform \(\left(\mathrm{CHCl}_{3}\right)\) to prepare \(2.6 \times 10^{-3} \mathrm{M}\) solution of $$\mathrm{CH}_{2}...

The energy of one mole of photons of radiation of frequency \(2 \times 10^{12} \mathrm{~Hz}\) in \(\mathrm{J} ~\mathrm{mol}^{-1}\) is ___________. (Nearest integer)
[Given : \(\mathrm{h}=6.626 \times 10^{-34} ~\mathrm{Js}\)
$$\mathrm{N}_{\m...

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : In expensive scientific instruments, silica gel is kept in watch-glasses or in semipermeable membrane bags.
Reason (R...

When 2 litre of ideal gas expands isothermally into vacuum to a total volume of 6 litre, the change in internal energy is ____________ J. (Nearest integer)