JEE Main 2021 (Online) 18th March Morning Shift

Considering the above chemical reaction, identify the product "X" :

Consider the above chemical reaction and identify product "A"

Compound with molecular formula C3H6O can show :

A non-reducing sugar "A" hydrolyses to give two reducing mono saccharides. Sugar A is

AX is a covalent diatomic molecule where A and X are second row elements of periodic table. Based on Molecular orbital theory, the bond order of AX is 2.5. The total number of electrons in AX is __________. (Round off to the Nearest Integer...

2NO(g) + Cl2(g) \(\rightleftharpoons\) 2NOCl(s) This reaction was studied at \(-\)10\(^\circ\) and the following data was obtained


Run
\({[NO]_0}\)
\({[C{l_2}]_0}\)
\({r_0}\)




1
0.10
0.10
0.18

...

Match the list - I with list - II



List - I(Class of Drug)

List - II(Example)




(a)
Antacid
(i)
Novestrol


(b)
Artificial sweetener
(ii)
Cimetidine


(c)
Antifertil...

Considering the above reaction, X and Y respectively are :

The total number of unpaired electrons present in the complex K3[Cr(oxalate)3] is _____________.

The correct structures of trans-[NiBr2(PPh3)2] and meridonial-[Co(NH3)3(NO2)3], respectively, are

Match List - I with List - II



List - I

List - II




(a)
Chlorophyll
(i)
Ruthenium


(b)
Vitamin-\({B_{12}}\)
(ii)
Platinum


(c)
Anticancer drug
(iii)
Cobalt...

For the reaction 2Fe3+(aq) + 2I\(-\)(aq) \(\to\) 2Fe2+(aq) + I2(s) the magnitude of the standard molar Gibbs free energy change, \(\Delta\)rG\(_m^o\) = \(-\) ___________ kJ (Round off to the Nearest Integer).$$\left[ {\matrix{
{E_{F{e^...

The statements that are TRUE :(A) Methane leads to both global warming and photochemical smog(B) Methane is generated from paddy fields(C) Methane is a stronger global warming gas than CO2(D) Methane is a part of reducing smogChoose the mos...

Reaction of Grignard reagent, C2H5MgBr with C8H8O followed by hydrolysis gives compound "A" which reacts instantly with Lucas reagent to give compound B, C10H13Cl. The Compound B is :

Match List - I with List - II :List - I (Chemicals)(a) Alcoholic potassium hydroxide(b) Pd/BaSO4(c) BHC (Benzene hexachloride)(d) PolyacetyleneList - II (Use / Preparation / Constituent)(i) Electrodes in batteries(ii) Obtained by addition r...

Given below are two statements : One is labelled as Assertion A and the other labelled as reason RAssertion A : During the boiling of water having temporary hardness, Mg(HCO3)2 is converted to MgCO3.Reason R : The solubility product of Mg(O...

In order to prepare a buffer solution of pH 5.74, sodium acetate is added to acetic acid. If the concentration of acetic acid in the buffer is 1.0 M, the concentration of sodium acetate in the buffer is ___________ M. (Round off to the Near...

The chemical that is added to reduce the melting point of the reaction mixture during the extraction of aluminium is :

Match List - I with List - II



List - I(process)

List - II(catalyst)




(a)
Deacron's process
(i)
ZSM-5


(b)
Contact process
(ii)
\(CuC{l_2}\)


(c)
Cracking of hydr...

The number of ionisable hydrogens present in the product obtained from a reaction of phosphorus trichloride and phosphonic acid is :

The ionic radius of Na+ ions is 1.02 \(\mathop A\limits^o\). The ionic radii (in \(\mathop A\limits^o\)) of Mg2+ and Al3+, respectively, are

Reagent, 1-napthylamine and sulphanilic acid in acetic acid is used for the detection of

Match List - I with List - II



List - I

List - II




(a)
\(Ca{(OCl)_2}\)
(i)
Antacid


(b)
\(CaS{O_4}.{1 \over 2}{H_2}O\)
(ii)
Cement


(c)
\(CaO\)
(iii)
Blea...

In a binary compound, atoms of element A form a hcp structure and those of element M occupy 2/3 of the tetrahedral voids of the hcp structure. The formula of the binary compound is :

2 molal solution of a weak acid HA has a freezing point of 3.885\(^\circ\)C. The degree of dissociation of this acid is ___________ \(\times\) 10\(-\)3. (Round off to the Nearest Integer).[Given : Molal depression constant of water = 1.85 K...

Complete combustion of 3g of ethane gives x \(\times\) 1022 molecules of water. The value of x is __________. (Round off to the Nearest Integer). [Use : NA = 6.023 \(\times\) 1023; Atomic masses in u : C : 12.0; O : 16.0; H : 1.0]

A reaction of 0.1 mole of Benzylamine with bromomethane gave 23 g of Benzyl trimethyl ammonium bromide. The number of moles of bromomethane consumed in this reaction are n \(\times\) 10\(-\)1, when n = __________. (Round off to the Nearest ...

__________ grams of 3-Hydroxy propanal (MW = 74) must be dehydrated to produce 7.8 g of acrolein (MW = 56) (C3H4O) if the percentage yield is 64. (Round off to the Nearest Integer).[Given : Atomic masses : C : 12.0 u, H : 1.0 u, O : 16.0 u ...

A certain orbital has no angular nodes and two radial nodes. The orbital is :

For the reaction C2H6 \(\to\) C2H4 + H2the reaction enthalpy \(\Delta\)rH = __________ kJ mol\(-\)1. (Round off to the Nearest Integer).[ Given : Bond enthalpies in kJ mol\(-\)1 : C-C : 347, C = C : 611; C-H : 414, H-H : 436 ]

The equation of the planes parallel to the plane x \(-\) 2y + 2z \(-\) 3 = 0 which are at unit distance from the point (1, 2, 3) is ax + by + cz + d = 0. If (b \(-\) d) = k(c \(-\) a), then the positive value of k is :

Let the plane ax + by + cz + d = 0 bisect the line joining the points (4, \(-\)3, 1) and (2, 3, \(-\)5) at the right angles. If a, b, c, d are integers, then the minimum value of (a2 + b2 + c2 + d2) is _________.

Let (1 + x + 2x2)20 = a0 + a1x + a2x2 + .... + a40x40. Then a1 + a3 + a5 + ..... + a37 is equal to

Choose the correct statement about two circles whose equations are given below :x2 + y2 \(-\) 10x \(-\) 10y + 41 = 0x2 + y2 \(-\) 22x \(-\) 10y + 137 = 0

For the four circles M, N, O and P, following four equations are given :Circle M : x2 + y2 = 1Circle N : x2 + y2 \(-\) 2x = 0Circle O : x2 + y2 \(-\) 2x \(-\) 2y + 1 = 0Circle P : x2 + y2 \(-\) 2y = 0If the centre of circle M is joined with...

Let z1, z2 be the roots of the equation z2 + az + 12 = 0 and z1, z2 form an equilateral triangle with origin. Then, the value of |a| is :

If the equation \(a|z{|^2} + \overline {\overline \alpha z + \alpha \overline z } + d = 0\) represents a circle where a, d are real constants then which of the following condition is correct?

Let f(x) and g(x) be two functions satisfying f(x2) + g(4 \(-\) x) = 4x3 and g(4 \(-\) x) + g(x) = 0, then the value of \(\int\limits_{ - 4}^4 {f{{(x)}^2}dx}\) is

The differential equation satisfied by the system of parabolas y2 = 4a(x + a) is :

The real valued function \(f(x) = {{\cos e{c^{ - 1}}x} \over {\sqrt {x - [x]} }}\), where [x] denotes the greatest integer less than or equal to x, is defined for all x belonging to :

If the functions are defined as \(f(x) = \sqrt x\) and \(g(x) = \sqrt {1 - x}\), then what is the common domain of the following functions :f + g, f \(-\) g, f/g, g/f, g \(-\) f where $$(f \pm g)(x) = f(x) \pm g(x),(f/g)x = {{f(x)} \over ...

The integral \(\int {{{(2x - 1)\cos \sqrt {{{(2x - 1)}^2} + 5} } \over {\sqrt {4{x^2} - 4x + 6} }}} dx\) is equal to (where c is a constant of integration)

If \(f(x) = \int {{{5{x^8} + 7{x^6}} \over {{{({x^2} + 1 + 2{x^7})}^2}}}dx,(x \ge 0),f(0) = 0}\) and \(f(1) = {1 \over K}\), then the value of K is

If \(\mathop {\lim }\limits_{x \to 0} {{{{\sin }^{ - 1}}x - {{\tan }^{ - 1}}x} \over {3{x^3}}}\) is equal to L, then the value of (6L + 1) is

If \(f(x) = \left\{ {\matrix{ {{1 \over {|x|}}} & {;\,|x|\, \ge 1} \cr {a{x^2} + b} & {;\,|x|\, < 1} \cr } } \right.\) is differentiable at every point of the domain, then the values of a and b are respectively :

The solutions of the equation $$\left| {\matrix{
{1 + {{\sin }^2}x} & {{{\sin }^2}x} & {{{\sin }^2}x} \cr
{{{\cos }^2}x} & {1 + {{\cos }^2}x} & {{{\cos }^2}x} \cr
{4\sin 2x} & {4\sin 2x} & {1 + 4\sin 2x} \cr

} } \right| = 0...

Let \(\alpha\), \(\beta\), \(\gamma\) be the real roots of the equation, x3 + ax2 + bx + c = 0, (a, b, c \(\in\) R and a, b \(\ne\) 0). If the system of equations (in u, v, w) given by \(\alpha\)u + \(\beta\)v + \(\gamma\)w = 0, \(\beta\)u ...

Let \(A + 2B = \left[ {\matrix{ 1 & 2 & 0 \cr 6 & { - 3} & 3 \cr { - 5} & 3 & 1 \cr } } \right]\) and \(2A - B = \left[ {\matrix{ 2 & { - 1} & 5 \cr 2 & { - 1} & 6 \cr 0 & 1 & 2 \cr } } \right]\). If Tr(A) ...

The missing value in the following figure is

The sum of all the 4-digit distinct numbers that can be formed with the digits 1, 2, 2 and 3 is :