JEE Advanced 2019 Paper 1 Offline | d and f Block Elements Question 7 | Chemistry

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JEE Advanced 2019 Paper 1 Offline

MCQ (Single Correct Answer)

-1

The green colour produced in the borax bead test of a chromium (III) salt is due to

Cr₂O₃

CrB

Cr(BO₂)₃

Cr₂(B₄O₇)₃

JEE Advanced 2017 Paper 2 Offline

MCQ (Single Correct Answer)

-0.75

Which of the following combination will produce $${H_2}$$ gas ?

Fe metal and conc. $$HN{O_3}$$

$$Cu$$ metal and conc. $$HN{O_3}$$

$$Zn$$ metal and $$NaOH(aq)$$

Au metal and $$NaCN\left( {aq} \right)$$ in the presence of air

JEE Advanced 2016 Paper 2 Offline

MCQ (Single Correct Answer)

-1

In the following reaction, sequence in aqueous solution, the species X, Y and Z, respectively, are

$${S_2}O_3^{2 - }\buildrel {A{g^ + }} \over \longrightarrow \mathop X\limits_{Clear\,solution} \buildrel {A{g^ + }} \over \longrightarrow \mathop Y\limits_{White\,precipitate} \buildrel {With\,time} \over \longrightarrow \mathop Z\limits_{Black\,precipitate} $$

[Ag(S₂O₃)₂]^3$$-$$, Ag₂S₂O₃, Ag₂S

[Ag(S₂O₃)₂]^5$$-$$, Ag₂SO₃, Ag₂S

[Ag(SO₃)₂]^3$$-$$, Ag₂S₂O₃, Ag

[Ag(SO₃)₃]^3$$-$$, Ag₂SO₄, Ag

JEE Advanced 2013 Paper 1 Offline

MCQ (Single Correct Answer)

-1

Upon treatment with ammoniacal H₂S, the metal ion that precipitates as a sulphide is

Fe(III)

Al(III)

Mg(II)

Zn(II)

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