Hydrocarbons practice · Mixed difficulty

In benzene, $C - C$ bond length is 1.39 $\mathop \mathrm{A}\limits^\mathrm{o}$; the $C - H$ bond length is:

Which of the following will decolourise alkaline $\mathrm{KMnO}_4$ solution?

In the following sequence the product D is,

$\mathrm{CH} \equiv \mathrm{CH}\xrightarrow{{HBr}}A\xrightarrow{{HBr}}B\xrightarrow{{\mathrm{KOH}(\mathrm{alc}\mathrm{.})}}C\xrightarrow{{\mathrm{NaN}{\mathrm{H}_2}}}D:$

S-I: Friedal Crafts Acylation of benzene with acetic anhydride in presence of anhydrous ${AlCl}_3$ yields acetophenone and not poly substituted products.
S-II: It is due to stearic hindrance of bulky actyl group $C{H_3} - \mathop {{\text{ }}C}\limits^{\begin{array}{cccccccccccccccccccc} O \\ \parallel \end{array}}-$ and also, it is a deactivating group.

One mole of alkene on ozonalysis give one mole of acetaldehyde and one mole of acetone. The IUPAC name of alkene is

An unknown compound A has a molecular formula ${\mathrm{C}_4}{\mathrm{H}_6}$. When A is treated with excess of $\mathrm{B}{\mathrm{r}_2}$ a new substance B with formula ${\mathrm{C}_4}{\mathrm{H}_6}\mathrm{B}{\mathrm{r}_4}\mathrm{\;}$ is formed. A forms a white ppt. with ammoniacal silver nitrate solution. A may be :

Kerosene is a mixture of:

Which of the following can be sulphonated most easily

Which of the following reagent is not involved in the halogenation of benzene

${\text{C}}{{\text{H}}_3} - {\text{C}} \equiv {\text{CH}}\xrightarrow[{{{\text{H}}_2}{\text{S}}{{\text{O}}_4}}]{{{\text{HgS}}{{\text{O}}_4}}}{\text{A}}\,\,\,\,{\text{C}}{{\text{H}}_3} - {\text{CH}} = {\text{C}}{{\text{H}}_2}\xrightarrow[{2 \cdot {{\text{H}}_2}{{\text{O}}_2}/{\text{O}}{{\text{H}}^ - }}]{{1.{\text{B}}{{\text{H}}_3},{\text{THF}}}}{\text{X}}\xrightarrow{{{\text{PCC}}}}{\text{B}}$
Products $\mathrm{A}$ and $\mathrm{B}$ are differentiated by

Kolbe’s synthesis on electrolysis of sodium salt of butanoic acid gives:

Which one of the following is the stable structure of cyclohexatriene?

Alkyl halides get converted to alkenes through:

Which of the following is produced when coal is subjected to destructive distillation?

Which of the following is elimination reaction?

Ethylene reacts with 1% alkaline $\mathrm{KMn}{\mathrm{O}_4}$ to form

Which of the following would not give 2phenylbutane as the major product in a FriedelCrafts alkylation reaction?

Which is most acidic of the following?

Which of the following hydrocarbon on reductive ozonolysis will produce $\mathrm{CO}_2$ gas?

Which of the following is correct formula of Gammaxane

Pure acetylene has sweet ethereal smell while impure smells like garlic due to presence of:

Which alkene on ozonalysis gives formaldehyde and acetaldehyde

In a nitration experiment, $10.0 \mathrm{~g}$ of benzene gave $13.2 \mathrm{~g}$ of nitrobenzene. The percentage yield for nitration of benzene is:

To enable easy detection of gas leakage from cylinders, the substance added to L.P.G. is:

Which of the following compounds contain ${1^0},{2^0},{3^0}$ as well as ${4^0}$ carbon atoms

Assertion (A): Acidity of $\mathrm{C}-\mathrm{H}$ bond decreases in the order $3{\text{CH}} \equiv {\text{CH}}\xrightarrow{{{\text{Red hot iron tube}}}}$
Reason (R): Acidity of the $\mathrm{C}-\mathrm{H}$ bond decreases as the electronegativity of the carbon to which it is attached decreases.

Which one is not prepared by Wurtz reaction

Butyne on oxidation with hot. alk $KMn{O_4}$ gives

Which of the following show Acidic Character of Alkyne?

Which of the following statement(s) is/are correct?

(i) Alkanes can have infinite number of conformations by rotation around a ${C}-{C}$ single bonds.

(ii) Rotation around ${C}-{C}$ single bond is completely free.

(iii) Rotation is hindered by a small energy barrier of $1-20 {~kJ} {~mol}^{-1}$ due to torsional strain.