Organic chemistry-some basic principles and techniques practice · Mixed difficulty

Select the correct statements

The order of decreasing stability of the carbanions

$\begin{array}{cccccccccccccccccccc} {{{\left( {{\text{C}}{{\text{H}}_3}} \right)}_3}{{\text{C}}^ - }}&{{{\left( {{\text{C}}{{\text{H}}_3}} \right)}_2}{\text{C}}{{\text{H}}^ - }}&{{\text{C}}{{\text{H}}_3}{\text{CH}}_2^ - }&{{{\text{C}}_6}{{\text{H}}_5}{\text{CH}}_2^ - } \\ {\left( {\text{I}} \right)}&{\left( {{\text{II}}} \right)}&{\left( {{\text{III}}} \right)}&{\left( {{\text{IV}}} \right)} \end{array}$

Optical isomerism is not shown by:

Statement I: trans-2-Butane on reaction with ${Br}_2$ gives meso-2,3-dibromobutane.

Statement II: The reaction involves syn-addition of bromine.

What is the correct order of decreasing stability of the following cations

I) $C{H_3} - \mathop C\limits^ \oplus H - C{H_3}$

II) $C{H_3} - \mathop C\limits^ \oplus H - OC{H_3}$

III) $C{H_3} - \mathop C\limits^ \oplus H - OC{H_3}$

In kjeldahl’s method, nitrogen present is estimated as:

Which of the following is a primary halide?

The number of isomers in ${\mathrm{C}_4}{\mathrm{H}_{10}}\mathrm{O}$ are

Ethanoyl chloride is the IUPAC name of

Which is the correct order of stability of the following three carbonium ions?
$\mathop {{\text{C}}{{\text{H}}_2} = {\text{CH}}\mathop {\text{C}}\limits^ + {{\text{H}}_3}}\limits_{\text{I}} ,\,\,\mathop {{\text{CH}} = \mathop {\text{C}}\limits^{\begin{array}{cccccccccccccccccccc} {{\text{C}}{{\text{H}}_3}} \\ {||} \end{array}} - {\text{C}}{{\text{H}}_2}}\limits_{{\text{II}}} ,\,\,\mathop {{\text{C}}{{\text{H}}_3}{\text{CH}} = {\text{CH}}\mathop {\text{C}}\limits^ + {{\text{H}}_2}}\limits_{{\text{III}}}$

Blood red colour solution is produced when ferric chloride solution is treated with:

The intermediate formed during the homolytic cleavage is

Aryl halides are less reactive towards nucleophilic substitution reaction as compared to alkyl due halides to:

Nitrogen detection in an organic compound is carried out by Lassaigne’s test. The blue colour formed corresponds to which of the following formulae

The sum of geometrical isomers in $\left[\mathrm{Pt}\left(\mathrm{H}_2 \mathrm{~N}-\mathrm{CH}\left(\mathrm{CH}_3\right) \mathrm{COO}^{-}\right)_2\right]$ complex and stereoisomers of $\left[\mathrm{Pt}(\text { gly })_3\right]^{+}$complex is

Assertion (A): Carboxylic acid is more acidic than carbolic acid.

Reason (R): Carboxylic acid have equivalent resonating structure.

Identify the correct statements from the
following.

(i) Electromeric effect is a permanent effect

(ii) Hyper conjugation is a temporary effect

(iii) Fractional distillation is used to separate
two liquids from a mixture if the difference
in their boiling points is less

(iv) Different compounds are adsorbed on an
adsorbent different extents

Assertion : When inductive and electromeric effects operate in opposite directions, the inductive effect predominates.

Reason : Inductive effect is the complete transfer of shared pair of $\pi$ electrons to one of the atoms.

First Nobel Prize winner in chemistry is:

Aniline is separated by:

The Lassaigne's extract is boiled with dil $\mathrm{HN}{\mathrm{O}_3}$ before testing for halogens because

In case of a homologous series each member differs from the preceding or the succeeding member by :

Compound (A) is formed on treating a benzilwith $\mathrm{NaBH}_4$. The number of possible meso isomers for (A) are

Assertion A: Hydrolysis of alkyl chloride is a slow reaction but in the presence of $NaI,$ the rate of the hydrolysis increases
Reason: $I^-$ is a good nucleophile as well as good leaving group
Correct answer from the options given below

The number of optical isomers of pent-3-en-2-ol is :

Fractional distillation is useful in distillation of

Which is purified by steam distillation

The number of asymmetric carbon atoms and the number of optical isomers in $\mathrm{C}{\mathrm{H}_3}{\left( {\mathrm{CHOH}} \right)_2}\mathrm{COOH}$ are respectively :

In chlorobenzene solution, the basic strength of amines increases in the order

How many stereoisomers does this molecule have?
$\mathrm{C}{\mathrm{H}_3}\mathrm{CH} = \mathrm{CHC}{\mathrm{H}_2}\mathrm{CHBrC}{\mathrm{H}_3}$