JEE Main 2021 (Online) 26th February Morning Shift

Given below are two statements : Statement I : o-Nitrophenol is steam volatile due to intramolecular hydrogen bonding.Statement II : o-Nitrophenol has high melting due to hydrogen bonding.In the light of the above statements, choose the mos...

Identify the major products A and B respectively in the following reactions of phenol :

B reacts with Hydroxyl amine but does not give Tollen's test. Identify A and B.

Given below are two statements :Statement I : A mixture of chloroform and aniline can be separated by simple distillation.Statement II : When separating aniline from a mixture of aniline and water by steam distillation aniline boils below i...

Which of the following vitamin is helpful in delaying the blood clotting?

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.Assertion A : Dipole-dipole interactions are the only non-covalent interactions, resulting in hydrogen bond formation.Reason R : Fluorine ...

A homogeneous ideal gaseous reaction \(A{B_{2(g)}} \rightleftharpoons {A_{(g)}} + 2{B_{(g)}}\) is carried out in a 25 litre flask at 27\(^\circ\)C. The initial amount of AB2 was 1 mole and the equilibrium pressure was 1.9 atm. The value of ...

An amine on reaction with benzensulphonyl chloride produces a compound insoluble in alkaline solution. This amine can be prepared by ammonolysis of ethyl chloride. The correct structure of amine is :

Number of bridging CO ligands in [Mn2(CO)10] is __________.

Which one of the following lanthanoids does not form MO2? [M is lanthanoid metal]

Consider the following reaction\(MnO_4^ - + 8{H^ + } + 5{e^ - } \to M{n^{ + 2}} + 4{H_2}O,{E^o} = 1.51V\).The quantity of electricity required in Faraday to reduce five moles of \(MnO_4^ -\) is ___________. (Integer answer)

Compound A used as a strong oxidizing agent is amphoteric in nature. It is the part of lead storage batteries. Compound A is :

The presence of ozone in troposphere :

A certain gas obeys P(Vm \(-\) b) = RT. The value of \({\left( {{{\partial Z} \over {\partial P}}} \right)_T}\) is \({{xb} \over {RT}}\). The value of x is _________. (Integer answer) (Z : compressibility factor)

3.12 g of oxygen is adsorbed on 1.2 g of platinum metal. The volume of oxygen adsorbed per gram of the adsorbent at 1 atm and 300 K in L is __________.[R = 0.0821 L atm K\(-\)1mol\(-\)1]

For the given reactionWhat is 'A'?

For the given reaction :What is 'A'?

Statements about heavy water are given below :A. Heavy water is used in exchange reactions for the study of reaction mechanisms.B. Heavy water is prepared by exhaustive electrolysis of water.(C) Heavy water has higher boiling point than ord...

Match List - I with List - II.



List - I (Ore)

List - II (Element Present)




(a)
Kernite
(i)
Tin


(b)
Cassiterite
(ii)
Boron


(c)
Calamine
(iii)
Fluorine
...

On treating a compound with warm dil. H2SO4, gas X is evolved which turns K2Cr2O7 paper acidified with dil. H2SO4 to a green compound Y. X and Y respectively are :

Find A, B and C in the following reactions :\(N{H_3} + A + C{O_2} \to {(N{H_4})_2}C{O_3}\)\({(N{H_4})_2}C{O_3} + {H_2}O + B \to N{H_4}HC{O_3}\)\(N{H_4}HC{O_3} + NaCl \to N{H_4}Cl + C\)

Match List - I with List - II.



List I Electronic configuration

List II \({\Delta _i}H\) in kJ \(mo{l^{ - 1}}\)




(a)
\(1{s^2}2{s^2}\)
(i)
801


(b)
\(1{s^2}2{s^2}2{p^4}\)
(ii)
...

The structure of Neoprene is :

Which of the following is 'a' FALSE statement ?

Dichromate ion is treated with base, the oxidation number of Cr in the product formed is ___________.

224 mL of SO2(g) at 298 K and 1 atm is passed through 100 mL of 0.1 M NaOH solution. The non-volatile solute produced is dissolved in 36g of water. The lowering of vapour pressure of solution (assuming the solution in dilute) (P$$_{({H_2}O)...

The number of significant figures in 50000.020 \(\times\) 10\(-\)3 is _____________.

The orbital having two radial as well as two angular nodes is :

An exothermic reaction X \(\to\) Y has an activation energy 30 kJ mol\(-\)1. If energy change \(\Delta\)E during the reaction is \(-\)20 kJ, then the activation energy for the reverse reaction in kJ is ___________. (Integer answer)

For a chemical reaction A + B ⇌ C + D(\({\Delta _r}{H^\Theta }\) = 80 kJ mol\(-\)1) the entropy change \({\Delta _r}{S^\Theta }\) depends on the temperature T (in K) as \({\Delta _r}{S^\Theta }\) = 2T (J K\(-\)1mol\(-\)1).Minimum temperatur...

Consider the three planesP1 : 3x + 15y + 21z = 9,P2 : x \(-\) 3y \(-\) z = 5, and P3 : 2x + 10y + 14z = 5Then, which one of the following is true?

If (1, 5, 35), (7, 5, 5), (1, \(\lambda\), 7) and (2\(\lambda\), 1, 2) are coplanar, then the sum of all possible values of \(\lambda\) is :

Let (\(\lambda\), 2, 1) be a point on the plane which passes through the point (4, \(-\)2, 2). If the plane is perpendicular to the line joining the points (\(-\)2, \(-\)21, 29) and (\(-\)1, \(-\)16, 23), then $${\left( {{\lambda \over {11...

Let f be any function defined on R and let it satisfy the condition : \(|f(x) - f(y)|\, \le \,|{(x - y)^2}|,\forall (x,y) \in R\)If f(0) = 1, then :

The maximum slope of the curve \(y = {1 \over 2}{x^4} - 5{x^3} + 18{x^2} - 19x\) occurs at the point :

The area bounded by the lines y = || x \(-\) 1 | \(-\) 2 | is ___________.

The maximum value of the term independent of 't' in the expansion of \({\left( {t{x^{{1 \over 5}}} + {{{{(1 - x)}^{{1 \over {10}}}}} \over t}} \right)^{10}}\) where x\(\in\)(0, 1) is :

Let m, n\(\in\)N and gcd (2, n) = 1. If $$30\left( {\matrix{
{30} \cr
0 \cr

} } \right) + 29\left( {\matrix{
{30} \cr
1 \cr

} } \right) + ...... + 2\left( {\matrix{
{30} \cr
{28} \cr

} } \right) + 1\left(...

In the circle given below, let OA = 1 unit, OB = 13 unit and PQ \(\bot\) OB. Then, the area of the triangle PQB (in square units) is :

The value of the integral \(\int\limits_0^\pi {|{{\sin }\,}2x|dx}\) is ___________.

The value of \(\int\limits_{ - \pi /2}^{\pi /2} {{{{{\cos }^2}x} \over {1 + {3^x}}}} dx\) is :

The value of \(\sum\limits_{n = 1}^{100} {\int\limits_{n - 1}^n {{e^{x - [x]}}dx} }\), where [ x ] is the greatest integer \(\le\) x, is :

The difference between degree and order of a differential equation that represents the family of curves given by \({y^2} = a\left( {x + {{\sqrt a } \over 2}} \right)\), a > 0 is _________.

The rate of growth of bacteria in a culture is proportional to the number of bacteria present and the bacteria count is 1000 at initial time t = 0. The number of bacteria is increased by 20% in 2 hours. If the population of bacteria is 2000...

If y = y(x) is the solution of the equation \({e^{\sin y}}\cos y{{dy} \over {dx}} + {e^{\sin y}}\cos x = \cos x\), y(0) = 0; then $$1 + y\left( {{\pi \over 6}} \right) + {{\sqrt 3 } \over 2}y\left( {{\pi \over 3}} \right) + {1 \over {\sqr...

If \({{{{\sin }^1}x} \over a} = {{{{\cos }^{ - 1}}x} \over b} = {{{{\tan }^{ - 1}}y} \over c}\); \(0 < x < 1\), then the value of \(\cos \left( {{{\pi c} \over {a + b}}} \right)\) is :

The value of \(\mathop {\lim }\limits_{h \to 0} 2\left\{ {{{\sqrt 3 \sin \left( {{\pi \over 6} + h} \right) - \cos \left( {{\pi \over 6} + h} \right)} \over {\sqrt 3 h\left( {\sqrt 3 \cosh - \sinh } \right)}}} \right\}\) is :

The number of solutions of the equation log4(x \(-\) 1) = log2(x \(-\) 3) is _________.

The value of \(\left| {\matrix{ {(a + 1)(a + 2)} & {a + 2} & 1 \cr {(a + 2)(a + 3)} & {a + 3} & 1 \cr {(a + 3)(a + 4)} & {a + 4} & 1 \cr } } \right|\) is :

Let A be a symmetric matrix of order 2 with integer entries. If the sum of the diagonal elements of A2 is 1, then the possible number of such matrices is :