JEE Main 2020 (Online) 4th September Evening Slot

The major product [R] in the following
sequence of reactions as :

The major product [B] in the following
reactions is :

The major product [C] of the following reaction
sequence will be :

The number of chiral centres present in
threonine is ________.

The reaction in which the hybridisation of the
underlined atom is affected is :

If the equilibrium constant for A ⇌ B + C is \(K_{eq}^{(1)}\) and that of
B + C ⇌ P is \(K_{eq}^{(2)}\), the equilibrium
constant for A ⇌ P is :

The number of molecules with energy greater
than the threshold energy for a reaction
increases five fold by a rise of temperature
from 27oC to 42oC. Its energy of activation in
J/mol is _____.
(Take ln 5 = 1.6094; R = 8.314 J mol–1 K–1)

The mechanism of action of ''Terfenadine''
(Seldane) is :

In the following reaction sequence, [C] is :

The molecule in which hybrid MOs involve only
one d-orbital of the central atom is :

The Crystal Field Stabilization Energy
(CFSE) of [CoF3(H2O)3] (\(\Delta\)0 < P) is :

The one that can exhibit highest paramagnetic
behaviour among the following is :
gly = glycinato; bpy = 2, 2'-bipyridine

The incorrect statement(s) among (a) - (c) is
(are)
(a) W(VI) is more stable than Cr(VI).
(b) In the presence of HCl, permanganate
titrations provide satisfactory results.
(c) Some lanthanoid oxides can be used as
phosphors.

250 mL of a waste solution obtained from the
workshop of a goldsmith contains 0.1 M AgNO3
and 0.1 M AuCl. The solution was electrolyzed
at 2V by passing a current of 1A for 15
minutes. The metal/metals electrodeposited will
be
[ $$E_{A{g^ +...

The processes of calcination and roasting in
metallurgical industries, respectively, can Iead
to :

Which of the following compounds will form the
precipitate with aq. AgNO3 solution most
readily?

Among the following compounds, which one
has the shortest C – Cl bond?

A 100 mL solution was made by adding 1.43 g
of Na2CO3.xH2O. The normality of the solution
is 0.1 N. The value of x is _____.
(The atomic mass of Na is 23 g/mol)

An alkaline earth metal ‘M’ readily forms water
soluble sulphate and water insoluble hydroxide.
Its oxide MO is very stable to heat and does not
have rock-salt structure. M is :

The osmotic pressure of a solution of NaCl is
0.10 atm and that of a glucose solution is
0.20 atm. The osmotic pressure of a solution
formed by mixing 1 L of the sodium chloride
solution with 2 L of the glucose solution is
x \(\times\) 10...

Consider the following equations :
2Fe2+ + H2O2 \(\to\) xA + yB
(in basic medium)
2MnO4- + 6H+ + 5H2O2 \(\to\) x'C + y'D + z'E
(in acidic medium)
The sum of the stoichiometric coefficients
x, y, x', y', and z' for products A, B, C, D ...

The shortest wavelength of H atom in the
Lyman series is \(\lambda\)1. The longest wavelength in
the Balmar series of He+ is :

A sample of red ink (a colloidal suspension) is
prepared by mixing eosin dye, egg white, HCHO
and water. The component which ensures
stability of the ink sample is :

Five moles of an ideal gas at 1 bar and 298 K
is expanded into vacuum to double the volume.
The work done is :

The process that is NOT endothermic in nature
is :