Distinguish between the following pair of compounds using a reagent as a chemical test: Magnesium chloride and magnesium nitrate solution.

Silver nitrate can be used to test chloride ion present in a compound thus magnesium chloride reacts with silver nitrate and forms a white precipitate of silver chloride and an aqueous solution of magnesium nitrate, but magnesium nitrate does not react with silver nitrate.

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The colour of the nitrogen dioxide gas is .

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Important Questions on Qualitative Analysis (Beyond Syllabus)

MEDIUM

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

Which combines with

{Fe}^{2 +}

to form brown complex?

EASY

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

Match List-I with List-II and select the correct answer using the codes given below.

	List I		List II
A.	Rinmann's green	1.	$Cu {({CH}_{3} COO)}_{2} \cdot Cu {(OH)}_{2}$
B.	Verdigris	2.	${HgCl}_{2}$
C.	Corrosive sublimate	3.	${CoZnO}_{2}$
D.	Lithopone	4.	$ZnS + {BaSO}_{4}$

MEDIUM

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

State one relevant observation for of the following:

Anhydrous calcium chloride is exposed to air for some time.

MEDIUM

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

Consider the following reactions:

NaCl + K_{2} {Cr}_{2} O_{7} + \underset{(Conc.)}{H_{2} {SO}_{4}} \to (A) +

side products

(A) + N a O H \to (B) +

side products

(B) + \underset{(dilute)}{H_{2} S O_{4}} + H_{2} O_{2} \to (C) +

side products
The sum of the total number of atoms in one molecule each of

(A), (B)

and

(C)

is ________

MEDIUM

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

A chloride salt solution acidified with dil.

{HNO}_{3}

gives a curdy white precipitate,

[A]

, on addition of

{AgNO}_{3}

. [A] on treatment with

{NH}_{4} OH

gives a clear solution, B.

MEDIUM

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

When a solution of mixture having two inorganic salts was treated with freshly prepared ferrous sulphate in acidic medium, a dark brown ring was formed whereas on treatment with neutral

{FeCl}_{3}

, it gave deep red colour which disappeared on boiling and a brown red ppt was formed. The mixture contains

EASY

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

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

Question Image

HARD

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

Distinguish between the following pair of compounds using a reagent as a chemical test:

Magnesium chloride and magnesium nitrate solution.

EASY

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for 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>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

A solution containing sulphite and sulphate ion can be easily distinguished by

HARD

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

Which of the following will not produce a precipitate with

{AgNO}_{3}

solution?

MEDIUM

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

Write chemical equation for the following:

Nitrogen dioxide is formed from a metallic nitrate.

HARD

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

Unknown salt

'A' + K_{2} {Cr}_{2} O_{7} + {Conc. H}_{2} {SO}_{4} \to Reddish brown fumes

. Which is the correct statement regarding the above observation?

MEDIUM

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

On mixing two colourless gases, a deep brown colour is observed. The gases are

EASY

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

(i)

A + {Na}_{2} {CO}_{3} \to B + C, (ii) A \overset{{CO}_{2}}{\to} (Milky) C

The chemical formula of A and B are respectively :

EASY

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

N a_{2} C O_{3}

cannot be used to identify

MEDIUM

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

Answer the questions given below. Relate your answers only to the acids given in the following list:
(Dilute hydrochloric acid, dilute nitric acid and dilute sulphuric acid)
Which acid will give a precipitate with barium chloride solution?

MEDIUM

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

Some reactions are given for salt(X).

Which of the following salt can be satisfied all the conditions?

EASY

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

Which of the following doesn't give a ppt. with silver nitrate solution.

HARD

Chemistry>Inorganic Chemistry>Qualitative Analysis (Beyond Syllabus)>Preliminary Test for Radicals

To an acid solution of an anion a few drops of KMnO₄ solution are added. Which of the following, if present will not decolourise the KMnO₄ solution

The colour of the nitrogen dioxide gas is .

Important Questions on Qualitative Analysis (Beyond Syllabus)

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