Question

If on adding $$FeC{l_3}$$  solution to acidified Lassaigne solution, a blood red colouration is produced, it indicates the presence of

A. $$S$$
B. $$N$$
C. $$N\,{\text{and}}\,S$$  
D. $$S\,{\text{and}}\,Cl$$
Answer :   $$N\,{\text{and}}\,S$$
Solution :
$$3NaCNS + F{e^{3 + }} \to $$     $$\mathop {Fe{{\left( {SCN} \right)}_3}}\limits_{\left( {{\text{Blood red}}} \right)} + 3N{a^ + }$$

Releted MCQ Question on
Organic Chemistry >> General Organic Chemistry

Releted Question 1

The bond order of individual carbon-carbon bonds in benzene is

A. one
B. two
C. between one and two
D. one and two alternately
View Answer
Releted Question 2

Molecule in which the distance between the two adjacent carbon atoms is largest is

A. Ethane
B. Ethene
C. Ethyne
D. Benzene
View Answer
Releted Question 3

Among the following, the compound that can be most readily sulphonated is

A. benzene
B. nitrobenzene
C. toluene
D. chlorobenzene
View Answer
Releted Question 4

The compound 1, 2-butadiene has

A. only $$sp$$   hybridized carbon atoms
B. only $$s{p^2}$$ hybridized carbon atoms
C. both $$sp$$  and $$s{p^2}$$ hybridized carbon atoms
D. $$sp$$ , $$s{p^2}$$ and $$s{p^3}$$ hybridized carbon atoms
View Answer

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General Organic Chemistry

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Physical ChemistrySome Basic Concepts in ChemistryStoichiometryStates of Matter Solid, Liquid and GasAtomic StructureChemical ThermodynamicsSolutionsSolid StateSurface ChemistryChemical EquilibriumIonic EquilibriumChemical KineticsRedox ReactionElectrochemistryNuclear Chemistry
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