JEE Main 2019 (Online) 9th January Morning Slot

Which amongst the following is the strongest acid ?

The correct decreasing order for acid strength is :

The increasing order of pka of the following amino acids in aqueous solution is :
Gly, Asp, Lys, Arg

According to molecular orbital theory, which of the following is true with respect to Li2+ and Li2\(-\) ?

The following results were obtained during kinetic studies of the reaction ;
2A + B \(\to\) Products

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Arrange the following amines in the decreasing order of basicity :

The major product of following reaction is :

Two complexes [Cr(H2O)6]Cl3 (A) and [Cr(NH3)6]Cl3 (B) are violet and yellow coloured, respectively. The incorrect statement regarding them is :

The anodic half-cell of lead-acid battery is recharged using electricity of 0.05 Faraday. The amount of PbSO4 electrolyzed in g during the process is : (Molar mass of PbSO4 = 303 g mol\(-\)1)

A water sample has ppm level concentration of the following metals : Fe = 0.2; Mn = 5.0; Cu = 3.0; Zn = 5.0. The metal that makes the water sample unsuitable for drinking is :

0.5 moles of gas A and x moles of gas B exert a pressure of 200 Pa in a container of volume 10 m3 at 1000 K. Given R is the gas constant in JK\(-\)1mol\(-\)1, x is :

The major product of the following reaction is :

The compounds A and B in the following reaction are, respectively :

The major product of the following reaction is :

The isotopes of hydrogen are :

20 mL of 0.1 M H2SO4 solution is added to 30 mL of of 0.2 M NH4OH solution. The pH of the resultant mixture is : [pkb of NH4OH = 4.7].

The ore that contains both iron and copper is :

The one that is extensively used as a piezoelectric material is :

Correct statements among a to d regarding silicones are :
(a)   They are polymers with hydrophobic character.
(b)   They are biocompatible.
(c)   In general, they have high thermal stability and low dielectric strength.
(d)   Usually, t...

Aluminium is usually found in +3 oxidation state. In contrast, thallium exists in + 1 and + 3 oxidation states. This is due to :

In general, the properties that decrease and increase down a group in the periodic table, respectively, are :

Major product of the following reaction is :

The correct match between Item-I and Item-II is :

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The alkaline earth metal nitrate that does not crystallise with water molecules, is :

Which one of the following statements regarding Henry's law is not correct ?

A solution of sodium sulphate contains 92 g of Na+ ions per kilogram of water. The molality of Na+ ions in that solution in mol kg\(-\)1 is :

For emission line of atomic hydrogen from ni = 8 to nf = n, the plot of wave number \(\left( {\overline v } \right)\) against \(\left( {{1 \over {{n^2}}}} \right)\) will be (The Rydberg constant, RH is in wave number unit)

The highest value of the calculated spin only magnetic moment (in BM) among all the transition metal complexes is :

Adsorption of a gas follows Freundlich adsorption isotherm. In the given plot, x is the mass of the gas adsorbed on mass m of the adsorbent at pressure P. \({x \over m}\) is proportional to :

Consider the reversible isothermal expansion of an ideal gas in a closed system at two different temperatures T1 and T2 (T1 < T2). The correct graphical depiction of the dependence of work done (w) on the final volume (V) is :