Organic Chemistry PYQ — Page 41

In $\overset{1}{C}{H}_{2}=\overset{2}{C}=\overset{3}{C}H-\overset{4}{C}{H}_{3}$ molecule, the hybridization of carbon $1,2,3$ and $4$ respectively, are :

Given below are two statements : $\mathrm{Statement}I:$ Aniline is less basic than acetamide. $\mathrm{Statement}\mathrm{II}:$ In aniline, the lone pair of electrons on nitrogen atom is delocalised over benzene ring due to resonance and hence less available to a proton. Choose the most appropriate option ;

The number of stereoisomers possible for $1,2$ -dimethyl cyclopropane is:

The number of sigma bonds in  is _______.

The product formed in the first step of the reaction of with excess $\mathrm{Mg}/{\mathrm{Et}}_{2}O(\mathrm{Et}={C}_{2}{H}_{5})$ is

Which one of the following reactions will not yield propanoic acid?

Which one of the following reactions will not form acetaldehyde?

Identify products $A$ and $B.$ 

The secondary structure of protein is stabilised by:

In Duma's method of estimation of nitrogen, $0.1840g$ of an organic compound gave $30\mathrm{mL}$ of nitrogen collected at $287K$ and $758\mathrm{mm}$ of $\mathrm{Hg}$ pressure. The percentage composition of nitrogen in the compound is ______. (Round off to the Nearest Integer). [Given : Aqueous tension at $287K=14\mathrm{mm}$ of $\mathrm{Hg}$]

Identify $A$ and $B$ in the chemical reaction. 

 Consider the above reaction, the product $X$ and $Y$ respectively are :

The number of moles of $\mathrm{CuO},$ that will be utilized in Dumas method for estimating nitrogen in a sample of $57.5g$ of $N,N-$dimethylaminopentane is ________ $\times {10}^{-2}.$ (Nearest integer)

Arrange the following conformational isomers of n-butane in order of their increasing potential energy: 

The correct order of reactivity of the given chlorides with acetate in acetic acid is :

In chromatography technique, the purification of a compound is independent of:

Given below are two statements : Statement I : ${C}_{2}{H}_{5}\mathrm{OH}$ and $\mathrm{AgCN}$ both can generate nucleophile. Statement II : $\mathrm{KCN}$ and $\mathrm{AgCN}$ both will generate nitrile nucleophile with all reaction conditions. Choose the most appropriate option :

Compound with molecular formula ${C}_{3}{H}_{6}O$ can show:

Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens?

$2,4-\mathrm{DNP}$ test can be used to identify :

Experimentally reducing a functional group cannot be done by which one of the following reagents ?

For the reaction given below :  The compound which is not formed as a product in the reaction is a :

An organic compound is subjected to chlorination to get compound $A$ using $5.0g$ of chlorine. When $0.5g$ of compound $A$ is reacted with ${\mathrm{AgNO}}_{3}$ [Carius Method], the percentage of chlorine in compound $A$ is when it forms $0.3849g$ of $\mathrm{AgCl}.$ (Round off to the Nearest Integer) (Atomic masses of $\mathrm{Ag}$ and $\mathrm{Cl}$ are $107.87$ and $35.5$ respectively)

$R-\mathrm{CN}\frac{(i)\mathrm{DIBAL}-H}{(\mathrm{ii}){H}_{2}O}\longrightarrow R-Y$ Consider the above reaction and identify "Y"