Organic Chemistry PYQ — Page 59

Which of the following amines can be prepared by Gabriel phthalimide reaction?

Heating of 2-chloro-1-phenylbutane with $EtOK/EtOH$ gives $X$ as the major product. Reaction $X$ with $Hg{(OAc)}_{2}/{H}_{2}O$ followed by $NaB{H}_{4}$ gives $Y$ as the major product. $Y$ is:

The increasing basicity order of the following compounds is:    

An ‘Assertion’ and a ‘Reason’ is given below. Choose the correct answer from the following options: Assertion $(A)$: Vinyl halides do not undergo nucleophilic substitution easily. Reason $(R)$: Even though the intermediate carbocation is stabilized by loosely held $\pi -$ electrons, the cleavage is difficult because of the strong bonding.

The correct structure of the product $‘P’$ in the following reaction is $\mathrm{Asn}-\mathrm{Ser}+\underset{(\mathrm{excess})}{{({\mathrm{CH}}_{3}\mathrm{CO})}_{2}O}\overset{{\mathrm{NEt}}_{3}}{\rightarrow }P$

Which of the following compounds is not aromatic?

The increasing order of the $pKa$ values of the following compounds is: 

The decreasing order of ease of alkaline hydrolysis for the following esters is 

The $IUPAC$ name of the following compound is: 

The organic compound that gives following qualitative analysis is:<table class="pyq-table"><tbody><tr><th></th><th>Test</th><th>Inference</th></tr><tr><td>$(a)$</td><td>$Dil.HCl$</td><td>Insoluble</td></tr><tr><td>$(b)$</td><td>$NaOH solution$</td><td>Soluble</td></tr><tr><td>$(c)$</td><td>$B{r}_{2}/water$</td><td>Decolourization</td></tr></tbody></table>

An aromatic compound $'A'$ having molecular formula ${C}_{7}{H}_{6}{O}_{2}$, on treating with aqueous ammonia and heating forms compound $'B'$. The compound $'B'$ on reaction with molecular bromine and potassium hydroxide provides compound $'C'$ having molecular formula ${C}_{6}{H}_{7}N$. The structure of $'A'$ is:

Which of the following tests cannot be used for identifying amino acids?

The increasing order of nucleophilicity of the following nucleophiles is; 

What is the IUPAC name of the following compound? 

The major product of the following reaction is: 

Polysubstitution is a major drawback in:

The major product $'Y'$ in the following reaction is: 

The correct match between item $I$ and item $\mathrm{II}$ is <table class="pyq-table"><tbody><tr><td colspan="2">Item $I$ (Compound)</td><td colspan="2">Item $\mathrm{II}$ (Reagent)</td></tr><tr><td>$a.$</td><td>Lysine</td><td>$p.$</td><td>$1-$naphthol</td></tr><tr><td>$b.$</td><td>Furfural</td><td>$q.$</td><td>Ninhydrin</td></tr><tr><td>$c.$</td><td>Benzyl alcohol</td><td>$r.$</td><td>${\mathrm{KMnO}}_{4}$</td></tr><tr><td>$d.$</td><td>Styrene</td><td>$s.$</td><td>Ceric ammonium nitrate</td></tr></tbody></table>

But-2-ene on reaction with alkaline $KMn{O}_{4}$ at elevated temperature followed by acidification will give:

In the following skew conformation of ethane, ${H}^{'}-C-C-{H}^{''}$ dihedral angle is: 

The major product of the following reaction 

The major product of the following reaction is: 

Number of stereo centers present in linear and cyclic structures of glucose are respectively:

Which of the following statements is not true about RNA?