Synthesis of Phenols II

Q.

Write the chemical equation for the following conversion:

ethanol to ethanoic acid

Q. Chlorobenzene can be prepared by reacting aniline with:

1. Hydrochloric acid
2. Nitrous acid followed by heating with cuprous chloride
3. Chlorine in the presence of anhydrous aluminium chloride
4. Cuprous chloride

Q. Write chemical reactions to affect the following transformations:

A Butan-$1$-ol to butanoic acid

B Benzyl alcohol to phenyl
ethanoic acid.

C $3$-Nitrobromobenzene to
$3$-nitrobenzoic acid

D $4$-Methylacetophenone to
benzene-$1,4$-dicarboxylic acid

E Cyclohexene to
hexane-$1,6$-dioic acid

F Butanal to butanoic acid.

Q.

Phthalic acid reacts with ammonia to give ammonium salt which on further heating at high temperature gives:

1. Benzamide

2. Benzoic acid

3. Benzoyl chloride

4. Phthalimide

Q. Give the structure and IUPAC names of the products expected from the following reactions:

$A$: Catalytic reduction of butanal

$B$: Hydration of propene in the presence of dilute sulphuric acid

$C$: Reaction of propanone with methylmagnesium bromide followed by hydrolysis

Q.

Which of the following does not form an acidic salt ?

1. Phosphoric acid

2. Carbonic acid

3. Hydrochloric acid

4. Sulphuric acid ​

Q.

Which is the active nitrating agent during the nitration of benzene?

Q.

How to convert benzene to benzophenone?

Q.

Assertion: Reimer-Tiemann reaction of phenol with ${\mathrm{CCl}}_4$ in $\mathrm{NaOH}$ at $340\mathrm{K}$ gives Salicylic acid as the major product.

Reason: The reaction occurs through intermediate formation of dichlorocarbene.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

3. Assertion is correct but Reason is incorrect

4. Both Assertion and Reason are incorrect

Q. Balance the following redox equations in basic medium by oxidation number method :
a) ${\mathrm{Zn}}_{\left(\mathrm{s}\right)}+{\mathrm{NO}}_{3\left(\mathrm{aq}\right)}^{-}\underset{}{\to }{\mathrm{NH}}_{3\left(\mathrm{aq}\right)}+\mathrm{Zn}(\mathrm{OH}{)}_{6\left(\mathrm{aq}\right)}^{2-}$
b) ${\mathrm{MnCl}}_{2\left(\mathrm{aq}\right)}+{\mathrm{HO}}_{2\left(\mathrm{aq}\right)}^{-}\underset{}{\to }\mathrm{Mn}{\left(\mathrm{OH}\right)}_{3\left(\mathrm{s}\right)}+{\mathrm{Cl}}_{\left(\mathrm{aq}\right)}^{-}$
c) ${\mathrm{Mn}}_{\left(\mathrm{aq}\right)}^{2+}+{\mathrm{H}}_2{\mathrm{O}}_{2\left(\mathrm{aq}\right)}\underset{}{\to }{\mathrm{MnO}}_{2\left(\mathrm{s}\right)}+{\mathrm{H}}_2{\mathrm{O}}_{\left(\mathrm{l}\right)}$
d) $\mathrm{Cu}{\left(\mathrm{OH}\right)}_{2\left(\mathrm{s}\right)}+{\mathrm{N}}_2{\mathrm{H}}_{4\left(\mathrm{aq}\right)}\underset{}{\to }{\mathrm{Cu}}_{\left(\mathrm{s}\right)}+{\mathrm{N}}_{2\left(\mathrm{g}\right)}$
e) $\mathrm{Fe}{\left(\mathrm{OH}\right)}_{2\left(\mathrm{s}\right)}+{\mathrm{CrO}}_{4\left(\mathrm{aq}\right)}^{2-}\underset{}{\to }\mathrm{Fe}{\left(\mathrm{OH}\right)}_{3\left(\mathrm{s}\right)}+\mathrm{Cr}{\left(\mathrm{OH}\right)}_{4\left(\mathrm{aq}\right)}^{-}$
f) ${\mathrm{TeO}}_{3\left(\mathrm{aq}\right)}^{2-}+{\mathrm{Cl}}_{2\left(\mathrm{g}\right)}\underset{}{\to }{\mathrm{TeO}}_{4\left(\mathrm{aq}\right)}^{2-}+{\mathrm{Cl}}_{\left(\mathrm{aq}\right)}^{-}$

Q.

Heat of neutralization of weak acid and strong base is less than the heat of

neutralisation of strong acid and strong base due to

1. Energy has to be spent for the total dissociation of weak acid

2. Salt of weak acid and strong base is not stable

3. Incomplete dissociation of weak acid

4. Incomplete neutralization of weak acid

Q.

Name the main product obtained when Ethanol is oxidised by using hot alkaline ${\mathrm{KMnO}}_4$ solution.

Q.

Name the addition product formed between Ethene and water

Q. Aqueous solution of alum is acidic due to hydrolysis of

1. 
2. 
3. Both and
4. 

Q. The Cannizzaro reaction of formaldehyde involves an:

1. intermlolecular shift of proton
2. intermolecular shift of hydride
3. intramolecular shift of proton
4. intramolecular shift of hydride

Q. Identify 'C' in the following :

1. Water
2. Ethanol
3. Propanone
4. Cumene hydroperoxide

Q. Under what conditions glucose is converted to gluconic and saccharic acid?

Q.

Assertion: Detergents with low CMC are more economical to use.

Reason : Cleansing action of detergents involves the formation of micelles. These are formed when the concentration of detergents becomes equal to CMC.

1. Assertion and reason both are correct but reason does not explain assertion

2. Assertion is correct but reason is incorrect.

3. Assertion is incorrect but reason is correct.

4. Assertion and reason both are correct and the reason is the correct explanation of assertion

5. Both assertion and reason are incorrect.

Q.

Oxidation of aldehyde gives:

1. Ketone

2. Amine

3. Acid

4. Phenol

Q.

In the nucleophilic substitution reaction in alkyl halides (R-X) , the nucleophile replaces:

1. Halide ion

2. Carbocation

3. Carbanion

4. Carbon atom of the C-X bond

Q.

What does Ethanol give when treated with alkaline ${\mathrm{KMnO}}_4$.

Q.

CaCl2 + C2H5OH = CaCl2.xC2H5OH . Then 'x' is

Q. Convert salicylic acid to phenol.

Q. Oxidation number of chlorine in HOCl

1. 0
2. 1
3. 2
4. –1

Q. $RCON{H}_2$ undergo acid catalysed hydrolysis to give:

1. $\mathrm{RCOOH}+\stackrel{+}{{\mathrm{NH}}_4}$
2. $\mathrm{RCOOH}+{\mathrm{NH}}_3$
3. $RCO{O}^{-}+N{H}_3$
4. $\mathrm{RCO}\stackrel{-}{O}+\stackrel{+}{N}\stackrel{}{H_4}$

Q. $Benzene\stackrel{X}{\to }Benzenesulphonicacid$.

1. Sulphuric acid
2. Hydrochloric acid
3. Sulphur
4. Both A and C

Q. 41. Identify product when (R)- and (S)-2-butanol reacts with (RR) tartaric acid in acidicmedium(a) Racemic(c) Meso(b) Diastereomer(d) Pure enantiomer

Q. What is picric acid? How is it prepared from phenol?

Q. In the given reaction
$C_6{H}_5-C{H}_3\stackrel{}{\to }\frac{air/Mn\left(II\right)/Cu\left(II\right)}{△}\left[X\right]$
[X] is:
$\left(a\right)C_6{H}_5-CHO\left(b\right)C_6{H}_5-COOH$
$\left(c\right)C_6{H}_5-C{H}_{2}OH\left(d\right)C_6{H}_5-OH$

1. a
2. b
3. c
4. d

Q. How nitrobenzene is identified using Mulliken-Barker test?