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.

Statement I : Borax bead test is not suitable for Al(III). Statement II : Al 2 O 3 is insoluble in water.

Statement I is true, Statement II is also true and Statement II is not a correct explanation of Statement I.

Statement I is true, Statement II is also true and Statement II is a correct explanation of Statement I.

Statement I is true, Statement II is false.

Statement I is false, Statement II is true.

EASY

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What could be the metal, if a chemistry student takes a small amount of paste of metallic salt on clean platinum wire loop of the salt with concentrated $HCl$ and keeps it in a non-luminous bunsen flame, the colour of the flame changes to grassy green ?

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Important Questions on Practical Chemistry

HARD

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

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

Magnesium chloride and magnesium nitrate solution.

MEDIUM

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

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

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

State one relevant observation for of the following:

Anhydrous calcium chloride is exposed to air for some time.

MEDIUM

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

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

EASY

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

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

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

Which combines with

{Fe}^{2 +}

to form brown complex?

MEDIUM

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

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

MEDIUM

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

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 ________

EASY

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

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.	$ZnS + {BaSO}_{4}$

EASY

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

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

Question Image

MEDIUM

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

Which of the following substance is obtained as precipitate when

{N a H C O}_{3}

solution is added to aqueous

{F e C l}_{3}

solution?

EASY

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

The salt used for performing 'bead' test in qualitative inorganic analysis is

MEDIUM

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

Which reagent is used to separate

S O_{4}^{2 -}

and

C l^{-}

HARD

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

Statement I : Borax bead test is not suitable for Al(III).

Statement II : Al₂O₃ is insoluble in water.

EASY

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

When the salt

(X)

is heated in a dry test tube sublimation yields a solid substance in the upper, colder parts of the test tube. The deposit is yellow in colour. Therefore salt

(X)

contain

HARD

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

The metal that does not give the borax bead test is

MEDIUM

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

The dark red colour of bombs in fireworks is due to the presence of

MEDIUM

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

When a substance 'A' reacts with water, it produces a combustible gas 'B' and a solution of substance 'C' in water. While another substance 'D' reacts with solution of 'C' to produce the same gas B on warming while 'D' can produce gas 'B' on reaction with dilute

H_{2} S O_{4}

at room temperature. 'A' imparts a deep golden - yellow colour to a smokeless flame on Bunsen burner. Identify 'A', 'B', 'C' and 'D' respectively are

MEDIUM

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

When a substance

A

reacts with water it produces a combustible gas

B

and a solution of a substance

C

in water. When another substance

D

reacts with this solution of

C

, it also produces the same gas

B

even on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow colour to a smokeless flame of Bunsen burner.

A, B, C

and

D

respectively are -

EASY

Science>Chemistry>Practical Chemistry>Action of Heat on Substances

Which one of the following anions is not easily removed from aqueous solutions by precipitation?

What could be the metal, if a chemistry student takes a small amount of paste of metallic salt on clean platinum wire loop of the salt with concentrated HCl and keeps it in a non-luminous bunsen flame, the colour of the flame changes to grassy green ?

Important Questions on Practical Chemistry

Learn and Prepare for any exam you want !

What could be the metal, if a chemistry student takes a small amount of paste of metallic salt on clean platinum wire loop of the salt with concentrated $HCl$ and keeps it in a non-luminous bunsen flame, the colour of the flame changes to grassy green ?