PbCl 2 + Kl → [ A ] Yellow ppt + KCl [ A ] Yellow ppt + KI excess ⟶ [ B ] soluble Compound A and B are

Pbl 2 and K 2 Pbl 4 respectively

Pbl 4 and K 2 Pbl 4 respectively

K 2 Pbl 4 and Pbl 4 respectively

Pbl 2 and K 2 Pbl 2 respectively

Match the following:- Column I Column II (Elements) (Symbol) (i) Acidic Radicals K + , Na + (ii) Basic Radicals Fe 2 + , Fe 3 + (iii) Monovalent Radicals CO 3 2 - , SO 4 2 - (iv) Variable Valency Cl - , K + (v) Tetravalent elements Pb 4 + , Pt 4 +

Acidic Radicals and Basic Radicals :- Negatively charged radicals are called acidic radicals . Positively charged radicals are called basic radicals . Acid radicals are formed by the removal of hydrogen ion ( H + ) . Basic radicals are formed by the removal of hydroxide ion ( OH - ) . Monovalent Radical:- A radical formally derived by the removal of one hydrogen atom from any position of any other parent hydride, is named by adding the suffix "-yl" to the name of the parent hydride, eliding the final "e" of the name of the parent hydride. Variable valency :- This property is called as variable valency. Some elements show variable valency because of the different electronic configurations. An atom of an element can sometimes lose more electrons than are present in its valence shell i.e. loss from the penultimate shell and hence exhibit more than 1 or variable valency. Tetravalent elements are those elements which have a valency of four i.e. have four electrons in the outermost shell. Examples are the elements belonging to group 14 like carbon , silicon , germanium etc. The symbol of radicals are - Column I Column II (Elements) (Symbol) (i) Acidic Radicals CO 3 2 - , SO 4 2 - (ii) Basic Radicals K + , Na + (iii) Monovalent Radicals Cl - , K + (iv) Variable Valency Fe 2 + , Fe 3 + (v) Tetravalent elements Pb 4 + , Pt 4 +

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A radical with one atom of carbon and three atoms of oxygen is ______.

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Important Questions on Theoretical Principles of Experimental Chemistry

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Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Basic Terminologies in Qualitative Analysis

Define qualitative and quantitative analysis.

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Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Basic Terminologies in Qualitative Analysis

The ion most difficult to remove as precipitate is

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Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Basic Terminologies in Qualitative Analysis

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In the above given reaction reactant (A) and product (B) and (C) are :

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Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Basic Terminologies in Qualitative Analysis

Give examples of composite radicals.

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${PbCl}_{2} + Kl \to \underset{Yellow ppt}{[A]} + KCl$

$\underset{Yellow ppt}{[A]} + \underset{excess}{KI} ⟶ \underset{soluble}{[B]}$ Compound $[A]$ and $[B]$ are

EASY

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Basic Terminologies in Qualitative Analysis

A radical with one atom of hydrogen, one atom of carbon and three atom of oxygen is_____.

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Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Basic Terminologies in Qualitative Analysis

Define the term radical.

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Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Basic Terminologies in Qualitative Analysis

Qualitative test of halogens in an organic compound is made by

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The colour of ppt. $A, B$ and $C$ respectively is

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Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Basic Terminologies in Qualitative Analysis

Ammonium chloride

({NH}_{4} Cl (s))

is heated in a test tube. Vapours are brought in contact with a red litmus paper, which changes to blue and then to red. It is because of

EASY

Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Basic Terminologies in Qualitative Analysis

Match the following:-

	Column I	Column II
	(Elements)	(Symbol)
(i)	Acidic Radicals	$K^{+}, {Na}^{+}$
(ii)	Basic Radicals	${Fe}^{2 +}, {Fe}^{3 +}$
(iii)	Monovalent Radicals	${CO}_{3}^{2 -}, {SO}_{4}^{2 -}$
(iv)	Variable Valency	${Cl}^{-}, K^{+}$
(v)	Tetravalent elements	${Pb}^{4 +}, {Pt}^{4 +}$

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Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Basic Terminologies in Qualitative Analysis

Identify the odd one out and justify.

Chloride, nitrate, hydride, ammonium.

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Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Basic Terminologies in Qualitative Analysis

The composition of golden spangles is:

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Give examples of metals with variable valency.

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Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Basic Terminologies in Qualitative Analysis

Select the incorrect statement with regards to Indigo .

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Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Basic Terminologies in Qualitative Analysis

Choose the correct pair regarding solubility.

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Chemistry>Inorganic Chemistry>Theoretical Principles of Experimental Chemistry>Basic Terminologies in Qualitative Analysis

Give the correct order of initials T or F for following statements. Use T if statement is true and F if it is false.

(i) Cu⁺ undergoes disproportionation to Cu and Cu²⁺ in aqueous solution

(ii) Hg₂Cl₂ does not impart chromyl chloride test

(iii) Sulphide ions react with sodium nitroprusside to form a purple coloured complex. In this reaction, oxidation state of iron changes.

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Select an example of a direct dye .

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An inorganic salt is lemon yellow in colour. It becomes orange in colour like methyl orange when it is acidic and again becomes yellow when it is alkaline. The inorganic salt will be :

HARD

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How can silicates be detected in qualitative analysis?

A radical with one atom of carbon and three atoms of oxygen is ______.

Important Questions on Theoretical Principles of Experimental Chemistry

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