JEE Main 2021 (Online) 1st September Evening Shift

Experimentally reducing a functional group cannot be done by which one of the following reagents?

In the following sequence of reactions a compound A, (molecular formula C6H12O2) with a straight chain structure gives a C4 carboxylic acid. A is :

Given below are two statements :Statement I : The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton transfer to form a stable ion.Statement II : The nucleophilic addition of hydrogen cyanide to an ...

Which one of the following compounds is aromatic in nature?

A peptide synthesized by the reactions of one molecule each of Glycine, Leucine, Aspartic acid and Histidine will have _________ peptide linkages.

Number of paramagnetic oxides among the following given oxides is ____________.Li2O, CaO, Na2O2, KO2, MgO and K2O

The spin-only magnetic moment value of \(B_2^ +\) species is _____________ \(\times\) 10\(-\)2 BM. (Nearest integer) [Given : \(\sqrt 3\) = 1.73]

Which one of the following given graphs represents the variation of rate constant (k) with temperature (T) for an endothermic reaction?

Identify A in the following reaction.

Which one of the following gives the most stable Diazonium salt?

The Crystal Field Stabilization Energy (CFSE) and magnetic moment (spin-only) of an octahedral aqua complex of a metal ion (Mz+) are \(-\)0.8 \(\Delta\)0 and 3.87 BM, respectively. Identify (Mz+) :

The potassium ferrocyanide solution gives a Prussian blue colour, when added to :

The sum of oxidation states of two silver ions in [Ag(NH3)2] [Ag(CN)2] complex is _____________.

In the given chemical reaction, colors of the Fe2+ and Fe3+ ions, are respectively :5Fe2+ + MnO\(_4^ -\) + 8H+ \(\to\) Mn2+ + 4H2O + 5Fe3+

Identify the element for which electronic configuration in +3 oxidation state is [Ar]3d5 :

If the conductivity of mercury at 0\(^\circ\)C is 1.07 \(\times\) 106 S m\(-\)1 and the resistance of a cell containing mercury is 0.243\(\Omega\), then the cell constant of the cell is x \(\times\) 104 m\(-\)1. The value of x is __________...

Water sample is called cleanest on the basis of which one of the BOD values given below :

An empty LPG cylinder weighs 14.8 kg. When full, it weighs 29.0 kg and shows a pressure of 3.47 atm. In the course of use at ambient temperature, the mass of the cylinder is reduced to 23.0 kg. The final pressure inside of the cylinder is _...

In the following sequence of reactions,The compounds B and C respectively are :-

The stereoisomers that are formed by electrophilic addition of bromine to trans-but-2-ene is/are :

Hydrogen peroxide reacts with iodine in basic medium to give :

The molar solubility of Zn(OH)2 in 0.1 M NaOH solution is x \(\times\) 10\(-\)18 M. The value of x is _________ (Nearest integer)(Given : The solubility product of Zn(OH)2 is 2 \(\times\) 10\(-\)20)

Calamine and Malachite, respectively, are the ores of :

The oxide without nitrogen-nitrogen bond is :

Monomer units of Dacron polymer are :

The number of atoms in 8g of sodium is x \(\times\) 1023. The value of x is ____________. (Nearest integer)[Given : NA = 6.02 \(\times\) 1023 mol\(-\)1Atomic mass of Na = 23.0 u]

If 80 g of copper sulphate CuSO4 . 5H2O is dissolved in deionised water to make 5L of solution. The concentration of the copper sulphate solution is x \(\times\) 10\(-\)3 mol L\(-\)1. The value of x is _____________.[Atomic masses Cu : 63.5...

A 50 watt bulb emits monochromatic red light of wavelength of 795 nm. The number of photons emitted per second by the bulb is x \(\times\) 1020. The value of x is __________. [Given : h = 6.63 \(\times\) 10\(-\)34 Js and c = 3.0 \(\times\) ...

Match List - I with List - II :
Choose the most appropriate answer from the options given below.

For the reaction, 2NO2(g) \(\rightleftharpoons\) N2O4(g), when \(\Delta\)S = \(-\)176.0 JK\(-\)1 and \(\Delta\)H = \(-\)57.8 kJ mol\(-\)1, the magnitude of \(\Delta\)G at 298 K for the reaction is ___________ kJ mol\(-\)1. (Nearest integer)