Chemistry : Organic Chemistry – Some Basic Principles and Techniques

The correct order of stability of carbocations, is :

• 1$°$ < 2$°$ < 3$°$ < CH₃

• $\stackrel{+}{\mathrm{C}}$H₃ < 1$°$ < 2$°$ < 3$°$

• 3$°$ < 2$°$ < 1$°$ < $\stackrel{+}{\mathrm{C}}$H₃

• 2$°$ < 3$°$ < 1$°$ < $\stackrel{+}{\mathrm{C}}$H₃

The IUPAC name of the following compound is

• bicyclo [2, 2, 0] octane

• bicyclo [0, 2, 2] hexane

• bicyclo [2, 1, 1] hexane

• bicyclo [2, 2, 0] hexane

The following compound can not exhibit

CH₃CH = CH - CH(OH).COOH

• geometrical isomerism

• optical isomerism

• metamerism

• position isomerism

Which of the following statement is not true about homolytic cleavage?

• In homolytic cleavage the movement of a single electron takes place instead of an electron pair.

• The organic reaction which proceed through homolytic bond cleavage are called ionic reactions or polar reactions

• Homolytic cleavage results in the formation of neutral species which contains an unpaired electrons

• None of the above

Which of the following has the maximum acidic strength ?

• p-nitrophenol

• p-nitrobenzoic acid

• o-nitrobenzoic acid

• m-nitrobenzoic acid

A light greenish coloured salt was soluble in water. On passing H₂S into the solution a black precipitate was obtained which dissolved readily in HCl The metal ion present is:

• Co²⁺

• Fe²⁺

• Ni²⁺

• Mn²⁺

The E-isomer among the following is:

Lunar caustic is

• AgCl

• AgNO₃

• NaOH

• KNO₃

What is 'X' in the following sequence ?

ArN₂Cl $\underset{\mathrm{KCN}}{\overset{\mathrm{CuCN}}{\to }}$ Z $\stackrel{\mathrm{H}.\mathrm{OH}}{\to }$ Y $\underset{∆}{\overset{\mathrm{soda}-\mathrm{lime}}{\to }}$ X

• Benzoic acid

• Sodium benzoate

• Benzaldehyde

• Benzene

A salt on reacting with dil. H₂S0₄ gives a reddish brown gas. The salt is:

• KNO₂

• ZnBr₂

• NaNO₃

• FeCl₃