VITEEE PYQs for Chemical Reactions with Solutions: Practice VITEEE Previous Year Questions

1.

Which one of the following compounds will be most readily dehydrated ?

2.

$CH_{3} - \overset{\underset{||}{O}}{C} - CH_{3} \ce{->[{SeO_{2}}]} X +Se +H_{2}O : X$ is

• $CH_{3} - \overset{\underset{||}{O}}{C} - \overset{\underset{||}{O}}{C} -H$
• $CH_{3} - \overset{\underset{||}{O}}{C} - OCH_{3}$
• $CH_{3} - \overset{\underset{||}{O}}{C} - CH_{2}OH$
• None of the above

3.

Anisole is treated with HI under two different conditions. $\ce{ C + D [conc.HI] A + B }$ The nature of A to D will be

• A and B are $CH_3I$ and $C_6H_5OH$, while C and D are $CH_3OH$ and $C_6H_5I$
• A and B are $CH_3OH$ and $C_6H_5I$, while C and D are $CH_3I$ and $C_6H_5OH$
• Both A and B as well as both C and D are $CH_3I$ and $C_6H_5OH$
• A and B are $CH_3I$ and $C_6H_5OH$, while there

4.

A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives

• benzyl alcohol and sodium formate
• sodium benzoate and methyl alcohol
• sodium benzoate and sodium formate
• benzyl alcohol and methyl alcohol

5.

\(CH_{3}\overset{\underset{||}{O}}{C}CH_{2}CH_{2}\overset{\underset{||}{O}}{C}OCH_{2}CH_{3}\underset{(ii) H_{3}O^{+}}{\overset{(i) CH_{3}MgBr (one mole)}{\longrightarrow}}A\)
A is formed in this reaction is

• $CH_3\underset{\overset{|}{C}H_3}{\overset{\underset{|}{O}H}{C}}CH_2CH_2\overset{\underset{||}{O}}{C}OCH_2CH_3$
• $CH_3 \overset{\underset{||}{O}}{C}CH_2CH_2\overset{\underset{||}{O}}{C}CH_3$
• 

• $CH_3 \underset{\overset{|}{O}H}{\overset{\underset{|}{C}H_3}{C}}CH_2 \,\,CH_2\underset{\overset{|}{O}H}{\overset{\underset{|}{C}H_3}{C}}CH_3$

6.

Glucose when heated with $CH_3OH$ in presence of dry $HCl$ gas gives $\alpha$- and $\beta$-methyl glucosides because it contains:

• An aldehyde group
• $A$ - $CH_2OH$ group
• A ring structure
• Five hydroxyl groups

7.

Which of the following reactions is used to prepare isobutane ?

• Wurtz reaction of $C_2H_5Br$
• Hydrolysis of n-butylmagnesium iodide
• Reduction of propanol with red phosphorus and $HI$
• Decarboxylation of 3-methylbutanoic acid

8.

The reagent (s) which can be used to distinguish acetophenone from benzophenone is (are)

• 2,4- dinitrophenylhydrazine
• aqueous solution of $NaHSO_3$
• benedict reagent
• $I_2$ and $Na_2CO_3$

9.

Which of the following compounds is formed when a mixture of $K_2Cr_2O_7$ and NaCl is heated with cone. $H_2SO_4$ ?

• $CrO_2Cl_2$
• $CrCl_3$
• $Cr_2(SO_4)_3$
• $Na_2CrO_4$

10.

Compound 'A' of molecular formula $C_4H_{10}O$ on treatment with Lucas reagent at room temperature gives compound ?B\ When compound ?B? is heated with alcoholic $KOH$, it gives isobutene. Compound ?A? and ?B? are respectively

• 2-methyl-2-propanol and 2-methyl-2- chloropropane
• 2-methyl-1 -propanol and l-chloro-2- methylpropane
• 2-methyl-1 -propanol and 2-methyl-2- chloropropane
• butan-2-ol and 2-chlorobutane

11.

Following compounds are given (i) $CH _{3} CH _{2} OH$ (ii) $CH _{3} COCH _{3}$ (iii) $CH _{3}- \underset{\overset{|}{C}H_3}{C}HOH$ (iv) $CH _{3} OH$ Which of the above compound(s) on being warmed with iodine solution and $NaOH$, will give iodoform?

• (i), (iii) and (iv)
• Only (ii)
• (i), (ii) and (iii)
• (i) and (ii)

12.

The order of reactivity of phenyl magnesium bromide $(PhMgBr)$ with the following compounds

• III > II > I
• II > I > III
• I > III > II
• I > II > III

13.

p-toluidine and benzyl amine can be distinguished by

• Sandmeyer's reaction
• Dye test
• Molisch test
• Gattermann reaction

14.

What is X?

15.

Which of the following will give Cannizzaro reaction?

• $CH_3CHO$
• $CH_3COCH_3$
• $(CH_3)_3C - CHO$
• $CH_3CH_2CHO$