JEE Advanced 2019 Paper 2 Offline | d and f Block Elements Question 6 | Chemistry

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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 2017 Paper 2 Offline

MCQ (More than One Correct Answer)

-1

The options(s) with only amphoteric oxides is (are)

$$C{r_2}{O_3},BeO,SnO,Sn{O_2}$$

$$C{r_2}{O_3},CrO,SnO,PbO$$

$$NO,{B_2}{O_3},PbO,Sn{O_2}$$

$$ZnO,A{l_2}{O_3},PbO,Pb{O_2}$$

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