JEE Main 2021 (Online) 27th July Morning Shift

Consider the above reaction and identify the Product P :

Which one of the following compounds will give orange precipitate when treated with 2, 4-dinitrophenyl hydrazine?

Staggered and eclipsed conformers of ethane are :

The correct order of stability of given carbocation is :

Which one among the following chemical tests is used to distinguish monosaccharide from disaccharide?

The compound 'A' is a complementary base of _______________ in DNA stands.

The difference between bond orders of CO and NO\(^ \oplus\) is \({x \over 2}\) where x = _____________. (Round off to the Nearest Integer)

PCl5 \(\rightleftharpoons\) PCl3 + Cl2Kc = 1.8443.0 moles of PCl5 is introduced in a 1 L closed reaction vessel at 380 K. The number of moles of PCl5 at equilibrium is ______________ \(\times\) 10\(-\)3. (Round off to the Nearest Integer)

For a reaction of order n, the unit of the rate constant is :

Match List - I with List - II :



List-I(Drug)

List-II(Class of Drug)




(a)
Furacin
(i)
Antibiotic


(b)
Arsphenamine
(ii)
Tranquilizers


(c)
Dimetone
(iii)
...

Given below are two statements : Statement I : Aniline is less basic than acetamide.Statement II : In aniline, the lone pair of electrons on nitrogen atom is delocalized over benzene ring due to resonance and hence less available to a proto...

In gaseous triethyl amine the "\(-\)C\(-\)N\(-\)C\(-\)" bond angle is _________ degree.

The type of hybridisation and magnetic property of the complex [MnCl6]3\(-\), respectively, are :

The number of geometrical isomers found in the metal complexes [PtCl2(NH3)2], [Ni(CO)4], [Ru(H2O)3Cl3 and [CoCl2(NH3)4]+ respectively, are :

The number of geometrical isomers possible in triamminetrinitrocobalt (III) is X and in trioxalatochromate (III) is Y. Then the value of X + Y is _______________.

The conductivity of a weak acid HA of concentration 0.001 mol L\(-\)1 is 2.0 \(\times\) 10\(-\)5 S cm\(-\)1. If \(\Lambda _m^o\)(HA) = 190 S cm2 mol\(-\)1, the ionization constant (Ka) of HA is equal to ______________ \(\times\) 10\(-\)6. (...

Which one of the following statements is NOT correct?

Presence of which reagent will affect the reversibility of the following reaction, and change it to a irreversible reaction :CH4 + I2 \(\mathrel{\mathop{\kern0pt\rightleftharpoons} \limits_{{\mathop{\rm Re}\nolimits} versible}^{hv}}\) CH3 ...

The statement is incorrect about Ellingham diagram is

The product obtained from the electrolytic oxidation of acidified sulphate solutions, is :

Match List - I with List - II :



List - I

List - II




(a)
NaOH
(i)
Acidic


(b)
\(Be{(OH)_2}\)
(ii)
Basic


(c)
\(Ca{(OH)_2}\)
(iii)
Amphoteric


(d)...

An organic compound is subjected to chlorination to get compound A using 5.0 g of chlorine. When 0.5 g of compound A is reacted with AgNO3 [Carius Method], the percentage of chlorine in compound A is ____________ when it forms 0.3849 g of A...

The oxidation states of 'P' in H4P2O7, H4P2O5 and H4P2O6, respectively, are :

Given below are two statements : One is labelled as Assertion A and the other labelled as Reason R.Assertion A : Lithium halides are some what covalent in nature.Reason R : Lithium posses high polarisation capability.In the light of the abo...

The parameters of the unit cell of a substance are a = 2.5, b = 3.0, c = 4.0, \(\alpha\) = 90\(^\circ\), \(\beta\) = 120\(^\circ\), \(\gamma\) = 90\(^\circ\). The crystal system of the substance is :

1.46 g of a biopolymer dissolved in a 100 mL water at 300 K exerted an osmotic pressure of 2.42 \(\times\) 10\(-\)3 bar.The molar mass of the biopolymer is _____________ \(\times\) 104 g mol\(-\)1. (Round off to the Nearest Integer)[Use : R...

The density of NaOH solution is 1.2 g cm\(-\)3. The molality of this solution is _____________ m. (Round off to the Nearest Integer)[Use : Atomic mass : Na : 23.0 u, O : 16.0 u, H : 1.0 u, Density of H2O : 1.0 g cm\(-\)3]

Given below are two statements :Statement I : Rutherford's gold foil experiment cannot explain the line spectrum of hydrogen atom.Statement II : Bohr's model of hydrogen atom contradicts Heisenberg' uncertainty principle.In the light of the...

CO2 gas adsorbs on charcoal following Freundlich adsorption isotherm. For a given amount of charcoal, the mass of CO2 adsorbed becomes 64 times when the pressure of CO2 is doubled. The value of n in the Freundlich isotherm equation is _____...

For water at 100\(^\circ\) C and 1 bar,\(\Delta\)vap H \(-\) \(\Delta\)vap U = _____________ \(\times\) 102 J mol\(-\)1. (Round off to the Nearest Integer)[Use : R = 8.31 J mol\(-\)1 K\(-\)1][Assume volume of H2O(l) is much smaller than vol...