Basics of Organic Chemistry

The possible number of stereoisomers for 5-phenylpent-4-en-2-ol is ________.

The hydrocarbon $(\mathrm{X})$ with molar mass $80 \mathrm{~g} \mathrm{~mol}^{-1}$ and $90 \%$ carbon has _______ degree of unsaturation.

Identify correct statement/s :
(A) $-\mathrm{OCH}_3$ and $-\mathrm{NHCOCH}_3$ are activating group.
(B) $\quad-\mathrm{CN}$ and -OH are meta directing group.
(C) -CN and $-\mathrm{SO}_3 \mathrm{H}$ are meta directing group.
(D) Activating g...

The correct stability order of the following species/molecules is :

The IUPAC name of the following compound is :

How many different stereoisomers are possible for the given molecule?

The incorrect statements regarding geometrical isomerism are :
(A) Propene shows geometrical isomerism.
(B) Trans isomer has identical atoms/groups on the opposite sides of the double bond.
(C) Cis-but-2-ene has higher dipole moment than tr...

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...

The most stable carbocation from the following is :

Relative stability of the contributing structures is :

For the given compounds, the correct order of increasing \(\mathrm{pK}_{\mathrm{a}}\) value :

Choose the correct answer from the options given below :

How many compounds among the following compounds show inductive, mesomeric as well as hyperconjugation effects?

Correct order of basic strength of Pyrrole , Pyridine and Piperidine is :

Methods used for purification of organic compounds are based on :

Total number of stereo isomers possible for the given structure :

The correct stability order of the following resonance structures of \(\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CHO}\) is

Given below are two statements :

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

The number of optical isomers in following compound is : __________.

Which of the following are aromatic?

The number of optically active compounds from the following is _________.

IUPAC name of following hydrocarbon(X) is :

Total number of aromatic compounds among the following compounds is ______.

The correct sequence of acidic strength of the following aliphatic acids in their decreasing order is:
$$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COOH}, \mathrm{CH}_3 \mathrm{COOH}, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{COOH}, \mathr...

Which of the following is metamer of the given compound (X) ?

Functional group present in sulphonic acids is :

The correct arrangement for decreasing order of electrophilic substitution for above compounds is :

Number of carbocations from the following that are not stabilized by hyperconjugation is _______.

The incorrect statement regarding the geometrical isomers of 2-butene is :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Cis form of alkene is found to be more polar than the trans form.
Reason (R) : Dipole moment of trans isomer of 2-but...

Using the given figure, the ratio of \(\mathrm{R}_f\) values of sample \(\mathrm{A}\) and sample \(\mathrm{C}\) is \(x \times 10^{-2}\). Value of \(x\) is __________.

The correct nomenclature for the following compound is :

Match List - I with List - II.

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Match List I with List II :

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The number of different chain isomers for C\(_7\)H\(_{16}\) is __________.

Which among the following is incorrect statement?

What will be the decreasing order of basic strength of the following conjugate bases? \({ }^{-} \mathrm{OH}, \mathrm{R} \overline{\mathrm{O}}, \mathrm{CH}_3 \mathrm{CO} \overline{\mathrm{O}}, \mathrm{Cl}\)

Correct order of stability of carbanion is :

The total number of 'sigma' and 'pi' bonds in 2-oxohex-4-ynoic acid is ______.

Given below are two statements:
Statement I: IUPAC name of \(\mathrm{HO}-\mathrm{CH}_2-\left(\mathrm{CH}_2\right)_3-\mathrm{CH}_2-\mathrm{COCH}_3\) is 7-hydroxyheptan-2-one.
Statement II: 2-oxoheptan-7-ol is the correct IUPAC name for above...

A species having carbon with sextet of electrons and can act as electrophile is called

Number of isomeric products formed by monochlorination of 2-methylbutane in presence of sunlight is ________.

The correct order of reactivity in electrophilic substitution reaction of the following compounds is :

Identify structure of 2,3-dibromo-1-phenylpentane.

Which of the following molecule/species is most stable?

Number of geometrical isomers possible for the given structure is/are _________.

IUPAC name of following compound is :

Which among the following purification methods is based on the principle of "Solubility" in two different solvents?

The correct stability order of carbocations is

The interaction between \(\pi\) bond and lone pair of electrons present on an adjacent atom is responsible for

Which one of the following will show geometrical isomerism?