JEE Main 2021 (Online) 31st August Morning Shift

The major product formed in the following reaction is :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Treatment of bromine water with propene yields 1-bromopropan-2-ol.Reason (R) : Attack of water on bromonium ion follo...

The structure of product C, formed by the following sequence of reactions is :

Choose the correct name for compound given below :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) :Assertion (A) : A simple distillation can be used to separate a mixture of propanol and propanone.Reason (R) : Two liquids with a dif...

Which one of the following compounds contains \(\beta\)-C1-C4 glycosidic linkage?

The number of hydrogen bonded water molecule(s) associated with stoichiometry CuSO4.5H2O is ____________.

For a first order reaction, the ratio of the time for 75% completion of a reaction to the time for 50% completion is ____________. (Integer answer)

According to the following figure, the magnitude of the enthalpy change of the reactionA + B \(\to\) M + N in kJ mol\(-\) is equal to ___________. (Integer answer)

The major products A and B in the following set of reactions are :

The total number of reagents from those given blow, that can convert nitrobenzene into aniline is ___________. (Integer answer)I. Sn \(-\) HClII. Sn \(-\) NH4OHIII. Fe \(-\) HClIV. Zn \(-\) HClV. H2 \(-\) PdVI. H2 \(-\) Raney Nickel

The denticity of an organic ligand, biuret is :

In the structure of the dichromate ion, there is a :

Which one of the following lanthanides exhibits +2 oxidation state with diamagnetic nature? (Given Z for Nd = 60, Yb = 70, La = 57, Ce = 58)

Consider the following cell reaction :\(C{d_{(s)}} + H{g_2}S{O_{4(s)}} + {9 \over 5}{H_2}{O_{(l)}}\) \(\rightleftharpoons\) \(CdS{O_4}.{9 \over 5}{H_2}{O_{(s)}} + 2H{g_{(l)}}\)The value of \(E_{cell}^0\) is 4.315 V at 25\(^\circ\)C. If $$\D...

BOD values (in ppm) for clean water (A) and polluted water (B) are expected respectively :

Which one of the following is the correct PV vs P plot at constant temperature for an ideal gas? (P and V stand for pressure and volume of the gas respectively)

The correct order of reactivity of the given chlorides with acetate in acetic acid is :

Given below are two statements :Statement I : The process of producing syn-gas is called gasification of coal.Statement II : The composition of syn-gas is CO + CO2 + H2 (1 : 1 : 1)In the light of the above statements, choose the most approp...

A3B2 is a sparingly soluble salt of molar mass M (g mol\(-\)1) and solubility x g L\(-\)1. The solubility product satisfies \({K_{sp}} = a{\left( {{x \over M}} \right)^5}\). The value of a is _____________. (Integer answer)

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A) : Aluminium is extracted from bauxite by the electrolysis of molten mixture of Al2O3 with cryolite.Reason (R) : The oxid...

Consider the sulphides HgS, PbS, CuS, Sb2S3, As2S3 and CdS. Number of these sulphides soluble in 50% HNO3 is ___________.

The number of halogen/(s) forming halic (V) acid is ___________.

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A) : Metallic character decreases and non-metallic character increases on moving from left to right in a period.Reason (R) ...

Monomer of Novolac is :

The major component/ingredient of Portland Cement is :

Which one of the following 0.10 M aqueous solutions will exhibit the largest freezing point depression?

The molarity of the solution prepared by dissolving 6.3 g of oxalic acid (H2C2O4.2H2O) in 250 mL of water in mol L\(-\)1 is x \(\times\) 10\(-\)2. The value of x is _____________. (Nearest integer) [Atomic mass : H : 1.0, C : 12.0, O : 16.0...

Ge(Z = 32) in its ground state electronic configuration has x completely filled orbitals with ml = 0. The value of x is ___________.

Select the graph that correctly describes the adsorption isotherms at two temperatures T1, and T2 (T1 > T2) for a gas :(x - mass of the gas absorbed ; m - mass of adsorbent ; P - pressure)