Match List I with List II. List-I (Anion) List-II (gas evolved on reaction with dil. H 2 SO 4 ) (A) CO 3 2 - (I) Colourless gas which turns lead acetate paper black. (B) S 2 - (II) Colourless gas which turns acidified potassium dichromate solution green. (C) SO 3 2 - (III) Brown fumes which turns acidified KI solution containing starch blue. (D) NO 2 - (IV) Colourless gas evolved with brisk effervescence, which turns lime water milky. Choose the correct answer from the options given below

A - IV , B - I , C - II , D - III

A - III , B - I , C - II , D - IV

A - II , B - I , C - IV , D - III

A - IV , B - I , C - III , D - II

HARD

Earn 100

Total number of colourless gases in the given list are

${CO}_{2 (g)}$ , ${Cl}_{2 (g)}$ , ${SO}_{2 (g)}$ , ${HCl}_{(g)}$ , ${Br}_{2}$ vapor, ${NO}_{2 (g)}$ , $I_{2}$ vapor, $H_{2} S_{(g)}$

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Important Questions on Theoretical Principles of Experimental Chemistry

EASY

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

In the detection of II group acid radical, the salt containing chloride is treated with concentrated sulphuric acid, the colourless gas is liberated. The name of the gas is

EASY

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

Reaction of an inorganic sulphite

X

with dilute

H_{2} {SO}_{4}

generated compound

Y

. Reaction of

Y

with

NaOH

gives

X

. Further, the reaction of

X

with

Y

and water affords compound

Z, Y

and

X

, respectively, are :

HARD

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

When a mixture of

NaCl, K_{2} {Cr}_{2} O_{7}

and concentrated

H_{2} {SO}_{4}

is heated in a dry test tube, a red vapour

(X)

is evolved. This vapour

(X)

turns an aqueous solution of

NaOH

yellow due to the formation of

Y . X

and

Y,

respectively, are:

EASY

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

The hottest region of Bunsen flame shown in the figure below is:

Question Image

MEDIUM

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

The sodium salt of an organic acid

X

produces effervescence with concentrated

H_{2} {SO}_{4}

X

reacts with the acidified aqueous

{CaCl}_{2}

solution to give a white precipitate which decolourises acidic solution of

{KMnO}_{4}

X

MEDIUM

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

Which combines with

{Fe}^{2 +}

to form brown complex?

MEDIUM

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

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

MEDIUM

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the before mentioned solution, a white precipitate is obtained which does not dissolve in dilute nitric acid. The anion is:

EASY

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

When treated with conc.

HCl, {MnO}_{2}

yields gas

(X)

which further reacts with

Ca {(OH)}_{2}

to generate a white solid

(Y)

reacts with dil.

HCl

to produce the same gas

X .

the solid

Y

MEDIUM

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

{HgCl}_{2}

and

I_{2}

both when dissolved in water containing

I^{-}

ions the pair of species formed is:

MEDIUM

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

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

HARD

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

A white precipitate was formed when

{BaCl}_{2}

was added to water extract of an inorganic salt. Further, a gas

' X'

with characteristic odour was released when the formed white precipitate was dissolved in dilute HCI. The anion present in the inorganic salt is:

EASY

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

The blue colour produced when a starch solution is added to a solution containing traces of $I_{2} and KI$ is due to

(I) formation of ${I_{3}}^{-}$

(II) formation of an inclusion complex

(III) Oxidation of starch

(IV) Oxidation of $I_{2}$

EASY

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

On heating, lead (ll) nitrate gives a brown gas (A). The gas (A) on cooling changes to a colourless solid/liquid (B). (B) on heating with NO changes to ablue solid (C). The oxidation number of nitrogen in solid (C) is:

HARD

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

The reagent(s) that can selectively precipitate

S^{2 -}

from a mixture of

S^{2 -}

and

S O_{4}^{2 -}

in aqueous solution is (are)

MEDIUM

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

Match List I with List II.

	List-I (Anion)		List-II (gas evolved on reaction with dil. $H_{2} {SO}_{4}$ )
(A)	${CO}_{3}^{2 -}$	(I)	Colourless gas which turns lead acetate paper black.
(B)	$S^{2 -}$	(II)	Colourless gas which turns acidified potassium dichromate solution green.
(C)	${SO}_{3}^{2 -}$	(III)	Brown fumes which turns acidified KI solution containing starch blue.
(D)	${NO}_{2}^{-}$	(IV)	Colourless gas evolved with brisk effervescence, which turns lime water milky.

Choose the correct answer from the options given below

HARD

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

Among the following cases how many will evolve coloured gas or fumes on reaction with concentrated

H_{2} {SO}_{4}

(cold or hot) ?

$KC l_{(s)} + K_{2} {Cr}_{2} {O_{7}}_{(s)}, KN {O_{2}}_{(s)}, {KI}_{(s)}, KB r_{(s)}, KC l_{(s)}$

$KB r_{(s)} + {MnO}_{2}_{(s)}, KN O_{3}, {KCl}_{(s)} + {MnO}_{2}, K_{2} {SO}_{3}$

HARD

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

Solution of

(x) + d i l H C l ⟶ y e l l o w p p t + g a s

having smell of burnt sulphur

Solution of

(x) + K C N s o l u t i o n ⟶ (Y) + (Z))

(Y) + e x c e s s o f d i l . H C l + F e C l 3 s o l u t i o n ⟶

blood red colouration

(Z) + P b {({N O}_{3})}_{2} ⟶

w h i t e p p t \overset{b o i l i n g}{\to} w h i t e p p t (M)

solution of

(Y) + P b {({N O}_{3})}_{2} s o l u t i o n \overset{b o i l i n g}{\to} b l a c k p p t

MEDIUM

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

Total number of anion(s) which give white precipitate with aqueous solution of ${AgNO}_{3}$ is/are:

$S^{2 -}, {HSO}_{3}^{Θ}, {SO}_{3}^{2 -}, S_{2} O_{3}^{2 -}, {CH}_{3} {COO}^{⊖}, {Cl}^{⊖}, I^{⊖}, {BO}_{3}^{3 -}$

EASY

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Systematic Analysis of Anionic Radicals

When phosphate radical react with ammonium molybdate, the colour of precipitate obtained is

Total number of colourless gases in the given list are CO2(g), Cl2(g), SO2(g), HCl(g), Br2 vapor, NO2(g), I2 vapor, H2S(g)

Important Questions on Theoretical Principles of Experimental Chemistry

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Total number of colourless gases in the given list are

${CO}_{2 (g)}$ , ${Cl}_{2 (g)}$ , ${SO}_{2 (g)}$ , ${HCl}_{(g)}$ , ${Br}_{2}$ vapor, ${NO}_{2 (g)}$ , $I_{2}$ vapor, $H_{2} S_{(g)}$