Organic chemistry-some basic principles and techniques practice · Mixed difficulty

Least stable conformer of cyclohexane is

The maximum number of possible optical isomers in 1-bromo-2-methyl cyclobutane is

Statement-I: In group III metal ion analysis we should not use only ${NH}_4{OH}$ without saturating by ${NH}_4 {Cl}$.

Statement-II: In the highly alkaline solution ${Mn}^{2+}$ and ${Ca}^{2+}$ both precipitated together.

In Duma’s method for determining the nitrogen content of an organic compound, the nitrogen content is determined in the form of:

Carbanion can undergo :

Rotation of plane polarized light can be measured by :

The tautomeric form which is less stable is called :

Unpaired electron in $\mathop C\limits^. {H_3}$ occupies:

Which of the organic compounds will give red colour in Lassaigne test?

Geometrical isomerism is not shown by

At low temperature, the slow addition of molecular bromine to ${\mathrm{H}_2}\mathrm{C} = \mathrm{CH}-\mathrm{C}{\mathrm{H}_2}-\mathrm{C} \equiv \mathrm{CH}$ gives:

The stability of 2,3-dimethyl but-2-ene is more than 2-butene. This can be explained in terms of :

A molecule is ${R_3}\mathrm{C}-\mathrm{H}$. If H is replaced by $\mathrm{Z}\left( {{R_3}\mathrm{C}-\mathrm{Z}} \right)$ and on doing so electron density on ${R_3}-\mathrm{C}$ part increases, then Z is :

Which technique among the following, is most appropriate in separation of a mixture of $100 \mathrm{mg}$ of $p$-nitrophenol and picric acid?

Inductive effect involves

The first organic compound urea was synthesized in the laboratory by:

Among the following, which one has more than one kind of hybridization?

(i) $\mathrm{C}{\mathrm{H}_3}\mathrm{C}{\mathrm{H}_2}\mathrm{C}{\mathrm{H}_2}\mathrm{C}{\mathrm{H}_3}$

(ii) $\mathrm{C}{\mathrm{H}_3}\mathrm{CH} = \mathrm{CHC}{\mathrm{H}_3}$

(iii)$\mathrm{C}{\mathrm{H}_2} = \mathrm{CH} - \mathrm{CH} \equiv \mathrm{CH}$

(iv) CH ≡ CH

Identify which of the following group act as $+ M$ as well as $- m$?

A Dewar flask is usually used to:

Total number of isomeric aldehydes and ketones that can exist with the molecular formula ${\mathrm{C}_5}{\mathrm{H}_{10}}\mathrm{O}$ :

The isomerism which exists between $\mathrm{C}{\mathrm{H}_3}\mathrm{CHC}{\mathrm{l}_2}$ and $\mathrm{C}{\mathrm{H}_2}\mathrm{ClC}{\mathrm{H}_2}\mathrm{Cl}$ is :

Which statement is true?

Which of the following would yield a carbon radical on heating?

The relative adsorption of each component of the mixture is expressed in terms of

Which of the following statements is correct?

The IUPAC name of $\mathrm{C}{\mathrm{H}_3} - \mathrm{C}{\mathrm{H}_2} - \mathrm{CHO}$

Total isomers with the molecular formula, $\mathrm{C}_4 \mathrm{H}_{11} \mathrm{N}$ is

A molecule having three different chiral carbon atoms, how many stereoisomers it will have?

The halogen compound which most readily undergoes nucleophilic substitutions is

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.