Organic chemistry-some basic principles and techniques practice · Medium

The correct order of stability of the given carbocation will be
$I.N{H_2} - C{H_2} - \mathop C\limits^ + {H_2}\,,\,\,II.C{H_3} - O - \mathop C\limits^ + {H_2}\,,\,III.\,N{O_2} - \mathop C\limits^ + {H_2}$

What is the correct order of decreasing stability of the following cations

I) $C{H_3} - \mathop C\limits^ \oplus H - C{H_3}$

II) $C{H_3} - \mathop C\limits^ \oplus H - OC{H_3}$

III) $C{H_3} - \mathop C\limits^ \oplus H - OC{H_3}$

Assertion: Pyridine is more basic than Pyrrole.

Reason: In Pyrrole, nitrogen has $sp^2$ hybridisation
and the lone pair of nitrogen is not available for
donation.

Which one of the carbanions is the least stable?

In Kjeldahl's method for the estimation of nitrogen, the formula used to

Identify, which of the below does not possess any element of symmetry?

Di-chloroacetic acid is a stronger acid than acetic acid.

This due to occurrence of

Which of the following compounds is isomeric with $2,2,4$, 4- tetramethylhexane?

An organic compound (molar mass = 60) is found to contain$C = {\text{ }}20\% ,\,\,H = {\text{ }}6.67\% {\text{ and}}\,N = \;46.67\% .$ While rest is oxygen. On heating it gives $N{H_3}$ along with a solid residue. The solid residue gives violet with alkaline $CuS{O_4}.$ The organic compound is:

The compound which will not show geometrical isomerism is

During hearing of a court case, the judge suspected that some changes in the documents had been carried out. He asked the forensic department to check the ink used at two different places. According to you which technique can give the best results?

Dumas method involves the determination of nitrogen content in the organic compound in the form of

Reimer-Tiemann reaction involves a:

What is the hybridization shown by ${C}_1$ and ${C}_2$ carbons, respectively in the given compound?

${OHC}-{CH}={CH}-{CH}_2 {COOCH}_3$

In organic compound phosphorus is estimated as:

Fuels from crude oil are separated from one another by:

2 – methyl butane on reaction with bromine in the presence of sun light gives mainly

$d$- tartaric acid and $l$- tartaric acid are :

The IUPAC name of ethylidene chloride is:

Assertion (A): All the carbon atoms in ${H_2}C = C = C{H_2}$ are $S{P^2}$ hybridized

Reason (R): $C{H_2} = C = C{H_2}$ is a planar molecule

Which of the following represents the correct IUPAC name for the compounds concerned?

IUPAC name of ${\left( {\mathrm{C}{\mathrm{H}_3}} \right)_2}\mathrm{N} - {\mathrm{C}_2}{\mathrm{H}_5}$ is :

The number of isomers in ${\mathrm{C}_4}{\mathrm{H}_{10}}\mathrm{O}$ are

Which resonating structure of vinyl. Chloride is least stable

Which one of the following compounds is most polar?

Thiophene is separated from benzene by:

Correct order of -I effect is:

(a) $-\stackrel{\oplus}{\text{N}} \text{R}_3$

(b) $-\stackrel{\oplus}{\mathrm{N}} \mathrm{H}_3$

(c) -CHO

(d) -COOH

Consider thiol anion $\left( {R{S^ \ominus }} \right)$ and alkoxy anion$\left( {R{S^ \ominus }} \right)$. Which of the following statement is correct?

IUPAC name of $[Pt{(N{H_3})_3}(Br)(N{O_2})Cl]\,\,Cl$ is

An organic compound has carbon and hydrogen percentage in the ratio 6:1 and carbon and oxygen percentages in the ratio 3:4. The compound has the empirical formula