JEE Advanced 2022 Paper 1 Online

MCQ (More than One Correct Answer)

-2

The treatment of galena with $\mathrm{HNO}_{3}$ produces a gas that is

paramagnetic

bent in geometry

an acidic oxide

colorless

JEE Advanced 2019 Paper 2 Offline

MCQ (More than One Correct Answer)

-1

With reference to aqua-regia, choose the correct option(s).

Aqua-regia is prepared by mixing conc. HCl and conc. HNO₃ in 3 : 1 (v / v) ratio

The yellow colour of aqua-regia is due to the presence of NOCl and Cl₂

Reaction of gold with aqua-regia produces an anion having Au in +3 oxidation state

Reaction of gold with aqua regia produces NO₂ in the absence of air

JEE Advanced 2019 Paper 1 Offline

MCQ (More than One Correct Answer)

-1

Fusion of MnO₂ with KOH in presence of O₂ produces a salt W. Alkaline solution of W upon electrolytic oxidation yields another salt X. The manganese containing ions present in W and X, respectively, are Y and Z. Correct statement(s) is (are)

Both Y and Z are coloured and have tetrahedral shape

Y is diamagnetic in nature while Z is paramagnetic

In both Y and Z, $$\pi $$-bonding occurs between p-orbitals of oxygen and d-orbitals of manganese

In aqueous acidic solution, Y undergoes disproportionation reaction to give Z and MnO₂

JEE Advanced 2018 Paper 2 Offline

MCQ (More than One Correct Answer)

-1

The correct option(s) to distinguish nitrate salts of $$M{n^{2 + }}$$ and $$C{u^{2 + }}$$ taken separately is (are)

$$M{n^{2 + }}$$ shows the characteristic green color in the flame test

Only $$C{u^{2 + }}$$ shows the formation of precipitate by passing $${H_2}S$$ in acidic medium

Only $$M{n^{2 + }}$$ shows the formation of precipitate by passing $${H_2}S$$ in faintly basic medium

$$C{u^{2 + }}/Cu$$ has higher reduction potential than $$M{n^{2 + }}/Mn$$ (measured under similar conditions)

JEE Advanced Subjects