JEE Main 2023 (Online) 29th January Evening Shift

A solution of \(\mathrm{Cr O_5}\) in amyl alcohol has a __________ colour.

Find out the major product for the following reaction.

The denticity of the ligand present in the Fehling's reagent is ___________.

Find out the major products from the following reaction sequence.

Following tetrapeptide can be represented as

(F, L, D, Y, I, Q, P are one letter codes for amino acids)

According to MO theory the bond orders for \(\mathrm{O}\)\(_2^{2 - }\), \(\mathrm{CO}\) and \(\mathrm{NO^+}\) respectively, are

At 298 K
\(\mathrm{N_2~(g)+3H_2~(g)\rightleftharpoons~2NH_3~(g),~K_1=4\times10^5}\)
\(\mathrm{N_2~(g)+O_2~(g)\rightleftharpoons~2NO~(g),~K_2=1.6\times10^{12}}\)
$$\mathrm{H_2~(g)+\frac{1}{2}O_2~(g)\rightleftharpoons~H_2O~(g),~K_3=1.0\times1...

For conversion of compound A \(\to\) B, the rate constant of the reaction was found to be \(\mathrm{4.6\times10^{-5}~L~mol^{-1}~s^{-1}}\). The order of the reaction is ____________.

A doctor prescribed the drug Equanil to a patient. The patient was likely to have symptoms of which disease?

Reaction of propanamide with \(\mathrm{Br_2/KOH(aq)}\) produces :

Correct order of spin only magnetic moment of the following complex ions is :
(Given At.no. Fe : 26, Co : 27)

Given below are two statements :
Statement I : Nickel is being used as the catalyst for producing syn gas and edible fats.
Statement II : Silicon forms both electron rich and electron deficient hydrides.
In the light of the above statements...

The set of correct statements is :
(i) Manganese exhibits +7 oxidation state in its oxide.
(ii) Ruthenium and Osmium exhibit +8 oxidation in their oxides.
(iii) Sc shows +4 oxidation state which is oxidizing in nature.
(iv) Cr shows oxidisi...

An indicator 'X' is used for studying the effect of variation in concentration of iodide on the rate of reaction of iodide ion with \(\mathrm{H_2O_2}\) at room temp. The indicator 'X' forms blue coloured complex with compound 'A' present in...

The equilibrium constant for the reaction
\(\mathrm{Zn(s)+Sn^{2+}(aq)}\) \(\rightleftharpoons\) \(\mathrm{Zn^{2+}(aq)+Sn(s)}\) is \(1\times10^{20}\) at 298 K. The magnitude of standard electrode potential of \(\mathrm{Sn/Sn^{2+}}\) if $$\ma...

The concentration of dissolved Oxygen in water for growth of fish should be more than \(\mathrm{\underline X }\) ppm and Biochemical Oxygen Demand in clean water should be less than \(\mathrm{\underline Y }\) ppm. X and Y in ppm are, respec...

The one giving maximum number of isomeric alkenes on dehydrohalogenation reaction is (excluding rearrangement)

The major component of which of the following ore is sulphide based mineral?

Given below are two statements :
Statement I : The decrease in first ionization enthalpy from B to Al is much larger than that from Al to Ga.
Statement II : The d orbitals in Ga are completely filled.
In the light of the above statements, c...

Total number of acidic oxides among
\(\mathrm{N_2O_3,NO_2,N_2O,Cl_2O_7,SO_2,CO,CaO,Na_2O}\) and \(\mathrm{NO}\) is ____________.

Match List I with List II

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On heating, \(\mathrm{LiNO_3}\) gives how many compounds among the following __________
\(\mathrm{Li_2O,N_2,O_2,LiNO_2,NO_2}\)

A metal M forms hexagonal close-packed structure. The total number of voids in 0.02 mol of it is _________ \(\times\) \(10^{21}\) (Nearest integer).
(Given \(\mathrm{N_A=6.02\times10^{23}}\))

Match List I with List II

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When a hydrocarbon A undergoes combustion in the presence of air, it requires 9.5 equivalents of oxygen and produces 3 equivalents of water. What is the molecular formula of A?

The volume of HCl, containing 73 g L\(^{-1}\), required to completely neutralise NaOH obtained by reacting 0.69 g of metallic sodium with water, is __________ mL. (Nearest Integer)
(Given : molar masses of Na, Cl, O, H, are 23, 35.5, 16 and...

When 0.01 mol of an organic compound containing 60% carbon was burnt completely, 4.4 g of CO\(_2\) was produced. The molar mass of compound is _____________ g mol\(^{-1}\) (Nearest integer).

Assume that the radius of the first Bohr orbit of hydrogen atom is 0.6 \(\mathrm{\mathop A\limits^o }\). The radius of the third Bohr orbit of He\(^+\) is __________ picometer. (Nearest Integer)

Match List I and List II

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Which of the following relations are correct?
(A) \(\mathrm{\Delta U=q+p\Delta V}\)
(B) \(\mathrm{\Delta G=\Delta H-T\Delta S}\)
(C) \(\Delta \mathrm{S}=\frac{q_{rev}}{T}\)
(D) \(\mathrm{\Delta H=\Delta U-\Delta nRT}\)
Choose the most appro...