JEE Main 2021 (Online) 27th July Evening Shift

Consider the above reaction, the major product "P" formed is :

Consider the above reaction, and choose the correct statement :

Given below are two statements :Statement I : Hyperconjugation is a permanent effect.Statement II : Hyperconjugation in ethyl cation \(\left( {C{H_3} - \mathop C\limits^ + {H_2}} \right)\) involves the overlapping of $${C_{s{p^2}}} - {H_{1...

The dihedral angle in staggered form of Newman projection of 1, 1, 1-Trichloro ethane is ___________ degree. (Round off to the nearest integer)

Compound A gives D-Galactose and D-Glucose on hydrolysis. The compound A is :

The total number of electrons in all bonding molecular orbitals of \(O_2^{2 - }\) is ______________.(Round off to the nearest integer)

The equilibrium constant for the reactionA(s) \(\rightleftharpoons\) M(s) + \({1 \over 2}\)O2(g)is Kp = 4. At equilibrium, the partial pressure of O2 is _________ atm. (Round off to the nearest integer)

For the first order reaction A \(\to\) 2B, 1 mole of reactant A gives 0.2 moles of B after 100 minutes. The half life of the reaction is __________ min. (Round off to the nearest integer).[Use : ln 2 = 0.69, ln 10 = 2.3]Properties of logari...

Given below are two statements :Statement I : Penicillin is a bacteriostatic type antibiotic.Statement II : The general structure of Penicillin is :Choose the correct option :

\(R - CN\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{(ii){H_2}O}^{(i)DIBAL - H}} R - Y\)Consider the above reaction and identify "Y"

What is A in the following reaction?

Given below are two statements :Statement I : \({[Mn{(CN)_6}]^{3 - }}\), \({[Fe{(CN)_6}]^{3 - }}\) and \({[Co{({C_2}{O_4})_3}]^{3 - }}\) are d2sp3 hybridised.Statement II : \({[MnCl)_6}{]^{3 - }}\) and \({[Fe{F_6}]^{3 - }}\) are paramagneti...

3 moles of metal complex with formula Co(en)2Cl3 gives 3 moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of Co in the complex is ___________.(Round off to the nearest integer)

For the cellCu(s) | Cu2+ (aq) (0.1 M) || Ag+(aq) (0.01 M) | Ag(s)the cell potential E1 = 0.3095 VFor the cellCu(s) | Cu2+ (aq) (0.01 M) || Ag+(aq) (0.001 M) | Ag(s)the cell potential = ____________ \(\times\) 10\(-\)2 V. (Round off the near...

The correct sequence of correct reagents for the following transformation is :

The number of neutrons and electrons, respectively, present in the radioactive isotope of hydrogen is :

Which one of the following set of elements can be detected using sodium fusion extract?

The addition of silica during the extraction of copper from its sulphide ore :-

Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : SO2(g) is absorbed to a large extent than H2(g) on activated charcoal.Reason R : SO2(g) has a higher critical temperature t...

Match List - I with List - II :
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Number of Cl = O bonds in chlorous acid, chloric acid and perchloric acid respectively are :

The correct order of first ionisation enthalpy is :

10.0 mL of 0.05 M KMnO4 solution was consumed in a titration with 10.0 mL of given oxalic acid dihydrate solution. The strength of given oxalic acid solution is _________ \(\times\) 10\(-\)2 g/L.(Round off to the nearest integer)

Match List - I with List - II :
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To an aqueous solution containing ions such as Al3+, Zn2+, Ca2+, Fe3+, Ni2+, Ba2+ and Cu2+ was added conc. HCl, followed by H2S.The total number of cations precipitated during this reaction is/are :

Select the correct statements(A) Crystalline solids have long range order.(B) Crystalline solids are isotropic(C) Amorphous solid are sometimes called pseudo solids.(D) Amorphous solids soften over a range of temperatures.(E) Amorphous soli...

In a solvent 50% of an acid HA dimerizes and the rest dissociates. The van't Hoff factor of the acid is __________ \(\times\) 10\(-\)2.(Round off to the nearest integer)

2SO2(g) + O2(g) \(\to\) 2SO3(g)The above reaction is carried out in a vessel starting with partial pressure PSO2 = 250 m bar, PO2 = 750 m bar and PSO3 = 0 bar. When the reaction is complete, the total pressure in the reaction vessel is ____...

If the Thompson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been :

When 400 mL of 0.2 M H2SO4 solution is mixed with 600 mL of 0.1 M NaOH solution, the increase in temperature of the final solution is __________ \(\times\) 10\(-\)2 K. (Round off to the nearest integer).[Use : H+ (aq) + OH\(-\) (aq) \(\to\)...