Organic Chemistry PYQ — Page 52

The increasing order of the acidity of the $\alpha$-hydrogen of the following compounds is:  $(A)(B)(C)(D)$

The increasing order of $p{K}_{b}$ for the following compounds will be : 

The increasing order of basicity of the following compounds is : 

The increasing order of basicity for the following intermediates is (from weak to strong) 

The final major product of the following reaction is : 

The decreasing order of reactivity towards dehydrohalogenation $({E}_{1})$ reaction of the following compounds is: 

The decreasing order of reactivity of the following organic molecules towards ${\mathrm{AgNO}}_{3}$ solution is: 

The decreasing order of reactivity of the following compounds towards nucleophilic substitution (${S}_{N}2$) is: 

The decreasing order of basicity of the following amines is: 

The correct order of the calculated spin-only magnetic moments of complexes $(A)$ to $(D)$ is: $(A)$ $Ni{(CO)}_{4}$ $(B)$ $[Ni{({H}_{2}O)}_{6}]C{l}_{2}$ $(C)$ $N{a}_{2}[Ni{(CN)}_{4}]$ $(D)$ $PdC{l}_{2}{(PP{h}_{3})}_{2}$

The correct order of stability for the following alkoxides is: 

The correct order of heat of combustion for following alkadienes is: 

The correct observation in the following reaction is: $\mathrm{Sucrose}\rightarrow _{\mathrm{Cleavage}(\mathrm{Hydrolysis})}^{\mathrm{Gly}\mathrm{cosidic}\mathrm{bond}}A+B\rightarrow _{\mathrm{Reagent}}^{\mathrm{Seliw}\mathrm{anoff}}?$

The correct match between Item-I (starting material) and Item-II (reagent) for the preparation of benzaldehyde is : <table class="pyq-table"><tbody><tr><td></td><td>Item-I</td><td></td><td>Item-II</td></tr><tr><td>(I)</td><td>Benzene</td><td>(P)</td><td>$\mathrm{HCl}$ and ${\mathrm{SnCl}}_{2},{H}_{3}O+$</td></tr><tr><td>(II)</td><td>Benzonitrile</td><td>(Q)</td><td>${H}_{2},\mathrm{Pd}-{\mathrm{BaSO}}_{4},S$ and quinoline</td></tr><tr><td>(III)</td><td>Benzoyl Chloride</td><td>(R)</td><td>$\mathrm{Co},\mathrm{HCl}\mathrm{and}{\mathrm{AlCl}}_{3}$</td></tr></tbody></table>

The compound A in the following reactions is: $A\rightarrow _{(\mathrm{ii})\mathrm{Conc}.{H}_{2}{\mathrm{SO}}_{4}/\Delta }^{(i){\mathrm{CH}}_{3}\mathrm{MgBr}/{H}_{2}O} B\rightarrow _{(\mathrm{ii})\mathrm{Zn}/{H}_{2}O}^{(i){O}_{3}}C+D$ 

$[P]$ on treatment with ${\mathrm{Br}}_{2}/{\mathrm{FeBr}}_{3}$ in ${\mathrm{CCl}}_{4}$ produced a single isomer ${C}_{8}{H}_{7}{O}_{2}\mathrm{Br}$ wile heating $[P]$ with sodalime gives toluene. The compound $[P]$ is:

Match the following : <table class="pyq-table"><tbody><tr><td></td><td>Test/Method</td><td></td><td>Reagent</td></tr><tr><td>(i)</td><td>Lucas Test</td><td>(a)</td><td>${C}_{6}{H}_{5}{\mathrm{SO}}_{2}\mathrm{Cl}/\mathrm{aq}.\mathrm{KOH}$</td></tr><tr><td>(ii)</td><td>Dumas method</td><td>(b)</td><td>${\mathrm{HNO}}_{3}/{\mathrm{AgNO}}_{3}$</td></tr><tr><td>(iii)</td><td>Kjeldahl's method</td><td>(c)</td><td>$\mathrm{CuO}/{\mathrm{CO}}_{3}$</td></tr><tr><td>(iv)</td><td>Hinsberg Test</td><td>(d)</td><td>Conc. $\mathrm{HCl}$ and ${\mathrm{ZnCl}}_{2}$</td></tr><tr><td></td><td></td><td>(e)</td><td>${H}_{2}{\mathrm{SO}}_{4}$</td></tr></tbody></table>

Match the following :<table class="pyq-table"><tbody><tr><th>$(i)$</th><th>Riboflavin</th><th>$(a)$</th><th>Beriberi</th></tr><tr><td>$(ii)$</td><td>Thiamine</td><td>$(b)$</td><td>Scurvy</td></tr><tr><td>$(iii)$</td><td>Pyridoxine</td><td>$(c)$</td><td>Cheilosis</td></tr><tr><td>$(iv)$</td><td>Ascorbic acid</td><td>$(d)$</td><td>Convulsions</td></tr></tbody></table>

Kjeldahl’s method cannot be used to estimate nitrogen for which of the following compounds?

In the following sequence of reactions the maximum number of atoms present in molecule ‘ $C$ ’ in one plane is_______ $A\overset{Red hot}{\underset{Cu tube}{\rightarrow }}B\overset{C{H}_{3}Cl(1.eq)}{\underset{Anhydrous AlC{l}_{3}}{\rightarrow }}C$ (A is a lowest molecular weight alkyne)

In the following reaction sequence the major products $A$ and $B$ are : 

In the following reaction sequence, structures of $A$ and $B$ are, respectively 

In the following reaction sequence,  the major product $B$ is

In the following reaction sequence, $[C]$ is :