1
JEE Advanced 2022 Paper 1 Online
MCQ (More than One Correct Answer)
+4
-2
Change Language
The treatment of galena with $\mathrm{HNO}_{3}$ produces a gas that is
A
paramagnetic
B
bent in geometry
C
an acidic oxide
D
colorless
2
JEE Advanced 2019 Paper 2 Offline
MCQ (More than One Correct Answer)
+4
-1
Change Language
With reference to aqua-regia, choose the correct option(s).
A
Aqua-regia is prepared by mixing conc. HCl and conc. HNO3 in 3 : 1 (v / v) ratio
B
The yellow colour of aqua-regia is due to the presence of NOCl and Cl2
C
Reaction of gold with aqua-regia produces an anion having Au in +3 oxidation state
D
Reaction of gold with aqua regia produces NO2 in the absence of air
3
JEE Advanced 2019 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-1
Change Language
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)
A
Both Y and Z are coloured and have tetrahedral shape
B
Y is diamagnetic in nature while Z is paramagnetic
C
In both Y and Z, $$\pi $$-bonding occurs between p-orbitals of oxygen and d-orbitals of manganese
D
In aqueous acidic solution, Y undergoes disproportionation reaction to give Z and MnO2
4
JEE Advanced 2018 Paper 2 Offline
MCQ (More than One Correct Answer)
+4
-1
Change Language
The correct option(s) to distinguish nitrate salts of $$M{n^{2 + }}$$ and $$C{u^{2 + }}$$ taken separately is (are)
A
$$M{n^{2 + }}$$ shows the characteristic green color in the flame test
B
Only $$C{u^{2 + }}$$ shows the formation of precipitate by passing $${H_2}S$$ in acidic medium
C
Only $$M{n^{2 + }}$$ shows the formation of precipitate by passing $${H_2}S$$ in faintly basic medium
D
$$C{u^{2 + }}/Cu$$ has higher reduction potential than $$M{n^{2 + }}/Mn$$ (measured under similar conditions)
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