Organic Chemistry PYQ — Page 9

The IUPAC name of the following compound is - 

Following are the four molecules "P", "Q", "R" and "S". Which one among the four molecules will react with $\mathrm{H}-\mathrm{Br}_{(\mathrm{aq})}$ at the fastest rate? 

Given below are two statements. Statement I : The dipole moment of $\stackrel{4}{\mathrm{CH}_3}-\stackrel{3~~~~}{\mathrm{CH}}=\stackrel{3~~~~}{\mathrm{CH}}-\stackrel{1~~~~}{\mathrm{CH}}=\mathrm{O}$ is greater than $\stackrel{4}{\mathrm{CH}_3}-\stackrel{3}{\mathrm{CH}_2}-\stackrel{2}{\mathrm{CH}_2}-\stackrel{1}{\mathrm{CH}}=\mathrm{O}$ Statement II : $\mathbf{C}_1-\mathbf{C}_2$ bond length of $\underset{4}{\mathrm{CH}_3-\mathrm{}} \underset{3}{\mathrm{CH=}} \underset{2}{\mathrm{CH}}-\mathrm{CH}=\mathrm{O}$ is greater than $\mathrm{C}_1-\mathrm{C}_2$ bond length of  In the light of the above statements, choose the correct answer from the options given below:

Total number of nucleophiles from the following is : \(\mathrm{NH}_3, \mathrm{PhSH},\left(\mathrm{H}_3 \mathrm{C}\right)_2 \mathrm{~S}, \mathrm{H}_2 \mathrm{C}=\mathrm{CH}_2, \stackrel{\ominus}{\mathrm{O}} \mathrm{H}, \mathrm{H}_3 \mathrm{O}^{\oplus},\left(\mathrm{CH}_3\right)_2 \mathrm{CO},\) 

Aman has been asked to synthesise the molecule (x).He thought of preparing the molecule using an aldol condensation reaction. He found a few cyclic alkenes in his laboratory. He thought of performing ozonolysis reaction on alkene to produce a dicarbonyl compound followed by aldol reaction to prepare " x ". Predict the suitable alkene that can lead to the formation of " $x$ ".

Given below are two statements : Statement (I) : Neopentane forms only one monosubstituted derivative. Statement (II) : Melting point of neopentane is higher than n-pentane In the light of the above statements, choose the most appropriate answer from the options given below :

A compound ' $\mathrm{X}^{\prime}$ absorbs 2 moles of hydrogen and ' $\mathrm{X}^{\prime}$ upon oxidation with $\mathrm{KMnO}_4 \mid \mathrm{H}^{+}$gives  The total number of $\sigma$ bonds present in the compound ' $\mathrm{X}^{\prime}$ is______

Given below are two statements : Statement (I) : Vanillin  will react with NaOH and also with Tollen's reagent. Statement (II) : Vanillin will undergo self aldol condensation very easily. In the light of the above statements, choose the most appropriate answer from the options given below :

In Carius method for estimation of halogens, 180 mg of an organic compound produced 143.5 mg of AgCl . The percentage composition of chlorine in the compound is _______ \%. (Given : molar mass in $\mathrm{g} \mathrm{mol}^{-1}$ of $\mathrm{Ag}: 108, \mathrm{Cl}: 35.5$ )

0.5 g of an organic compound on combustion gave 1.46 g of $\mathrm{CO}_2$ and 0.9 g of $\mathrm{H}_2 \mathrm{O}$. The percentage of carbon in the compound is _______. (Nearest integer) [Given : Molar mass (in $\mathrm{g} \mathrm{mol}^{-1}$) $\mathrm{C}: 12, \mathrm{H}: 1$, O: 16]

The carbohydrate "Ribose" present in DNA, is A. A pentose sugar B. present in pyranose from C. in "D" configuration D. a reducing sugar, when free E. in $\propto$-anomeric form Choose the correct answer from the options given below:

 Residue $(\mathrm{A})+\mathrm{HCl}$ (dil) $\rightarrow$ Compound $(\mathrm{B})$ Structure of residue (A) and compound (B) formed respectively is :

Match List - I with List - II.  Choose the correct answer from the options given below :

The $\alpha$-Helix and $\beta$ - Pleated sheet structures of protein are associated with its :

Given below are two statements: Statement I: Fructose does not contain an aldehydic group but still reduces Tollen's reagent Statement II: In the presence of base, fructose undergoes rearrangement to give glucose. In the light of the above statements, choose the correct answer from the options given below

Given below are two statements : Statement I : Dimethyl ether is completely soluble in water. However, diethyl ether is soluble in water to a very small extent.Statement II : Sodium metal can be used to dry diethyl ether and not ethyl alcohol. In the light of given statements, choose the correct answer from the options given below

Designate whether each of the following compounds is aromatic or not aromatic. 

The steam volatile compounds among the following are : (A)  (B) (C) (D) Choose the correct answer from the options given below :

The most stable carbocation from the following is :

Isomeric hydrocarbons $\quad \rightarrow \quad$ negative Baeyer's test (Molecular formula $\mathrm{C}_9 \mathrm{H}_{12}$ ) The total number of isomers from above with four different non-aliphatic substitution sites is -

The possible number of stereoisomers for 5-phenylpent-4-en-2-ol is $\ldots\ldots$

Match List-I with List-II - $\begin{array}{|l|l|l|l|}<br />\hline & \begin{array}{l}<br />\text { List-I } \\ \text { (Separation of) }<br />\end{array} & & \begin{array}{l}<br />\text { List-II } \\ \text { (Separation } \\ \text { Technique) }<br />\end{array} \\ \hline \text { (A) } & \begin{array}{l}<br />\text { Aniline from } \\ \text { aniline-water } \\ \text { mixture }<br />\end{array} & \text { (I) } & \begin{array}{l}<br />\text { Simple } \\ \text { distillation }<br />\end{array} \\ \hline \text { (B) } & \begin{array}{l}<br />\text { Glycerol from } \\ \text { spent-lye in soap } \\ \text { industry }<br />\end{array} & \text { (II) } & \begin{array}{l}<br />\text { Fractional } \\ \text { distillation }<br />\end{array} \\ \hline \text { (C) } & \begin{array}{l}<br />\text { Different } \\ \text { fractions of crude } \\ \text { oil in petroleum } \\ \text { industry }<br />\end{array} & \text { (III) } & \begin{array}{l}<br />\text { Distillation } \\ \text { at reduced } \\ \text { pressure }<br />\end{array} \\ \hline \text { (D) } & \begin{array}{l}<br />\text { Chloroform- } \\ \text { Aniline mixture }<br />\end{array} & \text { (IV) } & \begin{array}{l}<br />\text { Steam } \\ \text { distillation }<br />\end{array} \\ \hline<br />\end{array}$ Choose the correct answer from the options given below :

 The maximum number of RBr producing 2-methylbutane by above sequence of reactions is ________ - (Consider the structural isomers only)

Given below are two statements :  In the light of the above statements, choose the most appropriate answer from the options given below :