Organic chemistry-some basic principles and techniques practice · Medium

Given below are two statements.
Statement I: The presence of weaker $\pi {\text{ - }}$ bonds make alkenes less stable than alkanes.
Statement II: The strength of the double bond is greater than that of carbon-carbon single bond.
In the light of the above statements, choose the correct answer from the options given below.

The number of asymmetric carbon atoms and the number of optical isomers in $\mathrm{C}{\mathrm{H}_3}{\left( {\mathrm{CHOH}} \right)_2}\mathrm{COOH}$ are respectively :

Arrange the following in increasing order of stability
(A) ${\left( {C{H_3}} \right)_2}\mathop C\limits^ + - C{H_2}C{H_3}$ (B) ${\left( {C{H_3}} \right)_3}\mathop C\limits^ +$
(C) ${\left( {C{H_3}} \right)_2}\mathop {CH}\limits^ +$
(D) $C{H_3} - {\mathop {CH}\limits^ + _2}$ (E) ${\mathop {CH}\limits^ + _3}$

An organic compound contains 29.27% carbon, 5.69 % hydrogen and 65.04% bromine. Its empirical formula is

In Kjeldahl’s method, the Nitrogen present in the organic compound is quantitatively converted into

Anthraquinone is prepared by the oxidation of anthracene by chromic acid. The crude reaction product is usually purified by

Which of the following alkenes is most reactive for electrophilic addition reactions?

In Lassaigne’s test, a black colour is obtained if the organic compound contains sulphur. The black colour is due to

Highest priority functional group according to IUPAC is –

The isomeric $cis$-2-butene and $trans$-2-butene can be distinguished on the basis of :

Tests on an aqueous solution of sodium salt having an anion $\mathrm{X}^{\mathrm{n}-}$ gives the following results.

Anion $\mathrm{X}^{\mathrm{n}-} \stackrel{\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7}{\longrightarrow}$ Green solution

Anion $\mathrm{X}^{\mathrm{n}-} \stackrel{\mathrm{Pb}(\mathrm{OAc})_2}{\longrightarrow}$ Black precipitate

Which of the following could be $\mathrm{X}^{\mathrm{n}-}$ ?

The change in optical rotation with time of freshly prepared solution of sugar is known as:

In E2 elimination, some compounds follow Hofmann’s rule which means:

The number of optical enantiomorphs of tartaric acid :

The isomers which can be converted into another forms by rotation of the molecules around single bond are:

The best method for the separation of naphthalene and benzoic acid from their mixture is

Which of the following compounds will show metamerism?

If a compound on analysis was found to contain $\mathrm{C} = 18.5\mathrm{\% },\mathrm{\;H} = 1.55\mathrm{\% },\mathrm{\;Cl} = 55.04\mathrm{\% }$ and $\mathrm{O} = 24.81\mathrm{\% }$ then its empirical formula is

The number of optical isomers of 2, 3-dihydroxy butanal is

A strong base can abstract an α-hydrogen from :

Among the following the most stable compound is:

The weakest +M group of the given species is:

Rotational angle requires to get maximum stable conformer from minimum stable conformer in $n$-butane is

The permanent displacement of electron through a chain involving only $\sigma$-bonds is called

Which of the following organic compounds has same hybridization as its combustion product $\left(\mathrm{CO}_2\right)?$

In which of the following $p -$electrons of the halogens are not involved in delocalisation?

Which one of the following will show optical isomerism?

How many isomers of ${C_5}{H_{11}}OH$ will be primary alcohols?

Which is most commonly used to dry organic liquids?

Which of the following has maximum resonance energy?