Q 1 :

Given below are two statements:

Statement I: Propene on treatment with diborane gives an addition product with the formula $({\left({\mathrm{CH}}_3\right)}_2-{\mathrm{CH}}_3\mathrm{B}).$

Statement II: Oxidation of $({\left({\mathrm{CH}}_3\right)}_2-{\mathrm{CH}}_3\mathrm{B})$ with hydrogen peroxide in presence of NaOH gives propan-2-ol.

In the light of the above statements, choose the most appropriate answer from the options given below:             [2024]

• Statement I is correct but Statement II is incorrect.

   

• Statement I is incorrect but Statement II is correct.

   

• Both Statement I and Statement II are correct.

   

• Both Statement I and Statement II are incorrect.

   

Q 2 :

Identify D in the following sequence of reactions.           [2024]

• $n$-Propyl alcohol

   

• Isopropyl alcohol

   

• Propanal

   

• Propionic acid

   

Q 3 :

Which one of the following alcohols reacts instantaneously with Lucas reagent?         [2024]

• ${\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_2\mathrm{OH}$

   

• 

   

• 

   

• 

   

Q 4 :

$\mathrm{R}-\mathrm{COOH}\underset{\left(\mathrm{ii}\right){\mathrm{H}}_2\mathrm{O}/\mathrm{HCl}}{\overset{\left(\mathrm{i}\right)"\mathrm{X}"}{\to }}\mathrm{R}-{\mathrm{CH}}_2\mathrm{OH}$

$\mathrm{R}-\mathrm{CH}=\mathrm{C}{\mathrm{H}}_2\underset{\left(\mathrm{ii}\right){\mathrm{H}}_2\mathrm{O}, \mathrm{NaOH}, {\mathrm{H}}_2{\mathrm{O}}_2}{\overset{\left(\mathrm{i}\right)"\mathrm{X}"}{\to }}\mathrm{R}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\mathrm{OH}$

Identify 'X' in above reactions.                                               [2023]

• ${\mathrm{B}}_2{\mathrm{H}}_6$

   

• ${\mathrm{LiAlH}}_4$

   

• ${\mathrm{NaBH}}_4$

   

• ${\mathrm{H}}_2/\mathrm{Pd}$

   

Q 5 :

Consider the following reaction and identify the product (P).        [2023]

• 

   

• 

   

• 

   

• ${\mathrm{CH}}_3\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3$

   

Q 6 :

Which amongst the following will be most readily dehydrated under acidic conditions?          [2023]

Q 7 :

Given below are two statements :

Statement-I: The acidic strength of monosubstituted nitrophenol is higher than phenol because of electron withdrawing nitro group.

Statement-II: o-Nitrophenol, m-nitrophenol and p-nitrophenol will have same acidic strength as they have one nitro group attached to the phenolic ring.

In the light of the above statements, choose the most appropriate answer from the options given below:                         [2022]

• Both statement-I and statement-II are correct.

   

• Both statement-I and statement-II are incorrect.

   

• Statement-I is correct but statement-II is incorrect.

   

• Statement-I is incorrect but statement-II is correct.

   

Q 8 :

Given below are two statements :

Statement I : In Lucas test, primary, secondary and tertiary alcohols are distinguished on the basis of their reactivity with conc. HCl + anhydrous ${\mathrm{ZnCl}}_2$, known as Lucas Reagent.

Statement II : Primary alcohols are most reactive and immediately produced turbidity at room temperature on reaction with Lucas Reagent.

In the light of the above statements, choose the most appropriate answer from the options given below:                     [2022]

• Both statement I and statement II are correct.

   

• Both statement I and statement II are incorrect.

   

• Statement I is correct but statement II is incorrect.

   

• Statement I is incorrect but statement II is correct.

   

Q 9 :

Reaction between acetone and methyl magnesium chloride followed by hydrolysis will give               [2020]

• iso-propyl alcohol

   

• sec-butyl alcohol

   

• tert-butyl alcohol

   

• iso-butyl alcohol

   

Q 10 :

The structure of intermediate A in the following reaction is             [2019]

Q 11 :

When vapours of a secondary alcohol is passed over heated copper at 573 K, the product formed is           [2019]

• a carboxylic acid

   

• an aldehyde

   

• a ketone

   

• an alkene

   

Q 12 :

In the reaction,

the electrophile involved is                    [2018]

• dichloromethyl cation $\left(\stackrel{+}{\mathrm{C}}{\mathrm{HCl}}_2\right)$

   

• formyl cation $\left(\stackrel{+}{\mathrm{C}}\mathrm{HO}\right)$

   

• dichloromethyl anion $\left(\overline{\mathrm{C}}{\mathrm{HCl}}_2\right)$

   

• dichlorocarbene $(:{\mathrm{CCl}}_2)$

   

Q 13 :

Compound A, ${\mathrm{C}}_8{\mathrm{H}}_{10}\mathrm{O}$, is found to react with $\mathrm{NaOI}$ (produced by reacting Y with NaOH) and yields a yellow precipitate with characteristic smell. A and Y are respectively       [2018]

Q 14 :

Identify the major products P, Q and R in the following sequence of reactions:              [2018]

Q 15 :

Which one is the most acidic compound?             [2017]

Q 16 :

Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional group?         [2015]

• –COOH

   

• –${\mathrm{CHCl}}_2$

   

• –CHO

   

• –${\mathrm{CH}}_2\mathrm{Cl}$

   

Q 17 :

Which of the following reaction(s) can be used for the preparation of alkyl halides?             [2015]

(I)  ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}+\mathrm{HCl}\stackrel{\mathrm{Anh}. {\mathrm{ZnCl}}_2}{\to }$
(II)  ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}+\mathrm{HCl}\to$
(III)  ${\left({\mathrm{CH}}_3\right)}_3\mathrm{COH}+\mathrm{HCl}\to$
(IV)  ${\left({\mathrm{CH}}_3\right)}_2\mathrm{CHOH}+\mathrm{HCl}\stackrel{\mathrm{Anh}. {\mathrm{ZnCl}}_2}{\to }$

• (I) and (II) only

   

• (IV) only

   

• (III) and (IV) only

   

• (I), (III) and (IV) only

   

Q 18 :

Which of the following will not be soluble in sodium hydrogen carbonate?        [2014]

• 2,4,6-Trinitrophenol

   

• Benzoic acid

   

• o-Nitrophenol

   

• Benzenesulphonic acid