JEE Main 2019 (Online) 11th January Evening Slot

The major product of the following reaction is :

Which of the following compounds reacts with ethylmagnesium bromide and also decolourizes bromine water solution:

The major product obtained in the following reaction is :

The major product obtained in the following conversion is

In the following compound,

the favourable site/s for protonation is/are :

The correct match between Item I and Item II is :

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The reaction 2X \(\to\) B is a zeroth order reaction. If the initial concentration of X is 0.2 M, the half-life is 6 h. When the initial concentration of X is 0.5 M, the time required to reach its final concentration of 0.2 M will
be:

The correct match between Item I and Item II is :

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A compound 'X' on treatment with Br2/NaOH, provided C3H9N, which gives positive carbylamine test. Compound 'X' is :

The coordination number of Th in K4[Th(C2O4)4(OH2)2] is :
(C2O\({_4^{2 - }}\) = Oxalato)

The number of bridging CO ligand(s) and Co-Co bond(s) in Co2(CO)8, respectively are :

\(\underline A \,\,\buildrel {4KOH,{O_2}} \over \longrightarrow \,\,\mathop {2\underline B }\limits_{\left( {Green} \right)} \,\, + \,\,2{H_2}O\)
$$3\underline B \,\,\buildrel {4HCl} \over
\longrightarrow \,\,\mathop {2\underline C }\limi...

Given the equilibrium constant:
KC of the reaction :
Cu(s) + 2Ag+ (aq) \(\to\) Cu2+ (aq) + 2Ag(s) is 10 \(\times\) 1015, calculate the E\(_{cell}^0\) of this reaciton at 298 K [2.303 \({{RT} \over F}\) at 298 K = 0.059V]

Taj Mahal is being slowly disfigured and discoloured. This is primarily due to :

The higher concentration of which gas in air can cause stiffness of flower buds?

Which of the following compounds will produce a precipitate with AgNO3 ?

The relative stability of +1 oxidation state of group 13 elements follows the order :

The hydride that is NOT electron deficient :

The correct option with respect to the Pauling electronegativity values of the element is :

The homopolymer formed from 4-hydroxy-butanoic acid is :

The reaction that does NOT define calcination is :

Match the following items in column I with the corresponding items in column II.

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The radius of the largest sphere which fits properly at the centre of the edge of a body centred cubic unit cell is : (Edge length is represented by 'a')

K2Hgl4 is 40% ionised in aqueous solution. The value of its van't Hoff factor (i) is:

25 ml of the given HCl solution requires 30 mL of 0.1 M sodium carbonate solution. What is the volume of this HCl solution required to titrate 30 mL of 0.2 M aqueous NaOH solutions ?

The de Broglie wavelength (\(\lambda\)) associated with a photoelectron varies with the frequency (v) of the incident radiation as, [v0 is threshold frequency] :

Among the colloids cheese (C), milk (M), and smoke (S), the correct combination of the dispersed phase and dispersion medium, respectively is :

The standard reaction Gibbs energy for a chemical reaction at an absolute temperature T is given by
\(\Delta\)rGo = A – BT
Where A and B are non-zero constants. Which of the following is TRUE about this reaction?

The reaction, MgO(s) + C(s) \(\to\) Mg(s) + CO(g), for which \(\Delta\)rHo + 491.1 kJ mol–1 and \(\Delta\)rSo = 198.0 JK–1 mol–1, is not feasible at 298 K. Temperature above which reaciton will be feasible is :

For the equilibrium,
2H2O \(\rightleftharpoons\) H3O+ + OH\(-\), the value of \(\Delta\)Go at 298 K is approximately :