Colourless salt X → ∆ Y → C u 2 + , ∆ Coloured bead (Z) . (X) can be

Both Borax and Microcosmic salt

Colourless salt X → ∆ Y → C u 2 + , ∆ Coloured bead (Z) . (X) can be

Both Borax and Microcosmic salt

MEDIUM

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Colourless salt $(X) \overset{∆}{\to} (Y) \overset{C u^{2 +}, ∆}{\to} Coloured bead (Z)$ . (X) can be

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Important Questions on Theoretical Principles of Experimental Chemistry

MEDIUM

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Preliminary Test for Radicals

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

EASY

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>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>Theoretical Principles of Experimental Chemistry>Preliminary Test for Radicals

State one relevant observation for of the following:

Anhydrous calcium chloride is exposed to air for some time.

EASY

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Preliminary Test for Radicals

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

Question Image

MEDIUM

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Preliminary Test for Radicals

Which of the following salt gives white precipitate with

A g N O_{3}

solution and dil.

H_{2} S O_{4}

solution and gives green flame test

EASY

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Preliminary Test for Radicals

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

MEDIUM

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Preliminary Test for Radicals

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