MEDIUM

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A mixture is heated with dil. $H_{2} {SO}_{4}$ and the lead acetate parer turns black by the evolved gas.The mixture contains,

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Important Questions on Inorganic Chemistry in the Laboratory and in Industry

MEDIUM

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide

Sodium nitroprusside, when added to an alkaline solution of sulphide ions, produce a

MEDIUM

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide

Which of the following is not formed when H₂S reacts with acidic K₂Cr₂O₇ solution ?

EASY

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide

Acidified potassium dichromate is treated with hydrogen sulphide. In the reaction, the oxidation number of chromium

MEDIUM

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide

What colour is produced when

H_{2} S

gas is passed through an alkaline aqueous solution of sodium nitroprusside?

MEDIUM

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide

State one relevant observation for of the following:

Lead nitrate solution is treated with sodium hydroxide solution dropwise till it is in excess.

EASY

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide

To an aqueous solution containing ions such as

{Al}^{3 +}, {Zn}^{2 +}, {Ca}^{2 +}, {Fe}^{3 +}, {Ni}^{2 +}, {Ba}^{2 +}

and

{Cu}^{2 +}

was added

conc . HCl

, followed by

H_{2} S

. The total number of cations precipitated during this reaction is/are :

MEDIUM

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide

For the following Assertion and Reason, the correct option is

Assertion (A) : When $Cu$ (II) and sulphide ions are mixed, they react together extremely quickly to give a solid.

Reason (R) : The equilibrium constant of ${Cu}^{2 +} (aq) + S^{2 -} (aq) ⇌ CuS (s)$ is high because the solubility product is low.

EASY

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide

Write down the formula of the precipitate formed when

H_{2} S

gas is passed through an aqueous solution of silver nitrate.

HARD

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide

The reaction of

Pb {({NO}_{3})}_{2}

and

NaCl

in water produces a precipitate that dissolves upon the addition of

HCl

of appropriate concentration. The dissolution of the precipitate is due to the formation of

MEDIUM

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide

Formation of which complex, among the following, is not a confirmatory test of

{Pb}^{2 +}

ions

EASY

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide

Write the name of the gas that smells like rotten eggs.

MEDIUM

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide

The pair(s) of ions where BOTH the ions are precipitated upon passing

H_{2} S

gas in presence of dilute

HCl

, is (are)

MEDIUM

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide

The incorrect statement is:

HARD

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide

A mixture of two salts is used to prepare a solution $S,$ which gives the following results:

$White precipitate (s) only \leftarrow_{Room temperature}^{Dilute NaOH (aq)} \underset{(aq . solution of the salts)}{S} \to_{Room temperature}^{Dilute HCl (aq)} White precipitate (s) only$

The correct option $(s)$ for the salt mixture is(are)

EASY

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide

Mercurous ion

({Hg}_{2}^{2 +})

gives white precipitate on reacting with

MEDIUM

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide

You are given the following white powders:
Lead carbonate
Describe the tests you would carry out in solutions to identify the metal in each of the above white powders. Also, indicate clearly, the method you would use to prepare the solutions for the tests.

HARD

Physical Science>Chemistry>Inorganic Chemistry in the Laboratory and in Industry>Hydrogen Sulphide