JEE Advanced 2019 Paper 2 Offline | JEE Advanced Year Wise Previous Years Questions

JEE Advanced 2019 Paper 2 Offline

MCQ (More than One Correct Answer)

-1

Consider the following reactions (unbalanced).

$$Zn + Hot\,conc.\,{H_2}S{O_4}\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{}} G + R + X$$

$$Zn + conc.\,NaOH\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{}} T + Q$$

$$G + {H_2}S + N{H_4}OH\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{}} Z\,(a\,precipitate) + X + Y$$

Choose the correct option(s).

The oxidation state of Zn in T is +1

R is a V-shaped molecule

Bond order of Q is 1 in its ground state

Z is dirty white in colour

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 2 Offline

MCQ (More than One Correct Answer)

-1

Choose the correct option(s) from the following.

Teflon is prepared by heating tetrafluoroethene in presence of a persulphate catalyst at high pressure.

Natural rubber is polyisoprene containing trans alkene units

Cellulose has only $$\alpha $$-D-glucose units that are joined by glycosidic linkages

Nylon-6 has amide linkages

JEE Advanced 2019 Paper 2 Offline

MCQ (More than One Correct Answer)

-1

The cyanide process of gold extraction involves leaching out gold from its ore with CN^$$-$$ in the presence of Q in water to form R. Subsequently, R is treated with T to obtain Au and Z. Choose the correct option(s).

Q is O₂

Z is [Zn(CN)₄]^2$$-$$

T is Zn

R is [Au(CN)₄]^$$-$$

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