Hydrocarbons practice · Medium

Which of the following will not produce ethane

The most stable conformational isomer of cyclohexane is:

Among the following number of meta directing groups are:
$-\mathrm{CN},-\mathrm{NO}_2,-\mathrm{COOH},-\mathrm{CH}_3,-\mathrm{SO}_3 \mathrm{H},-\stackrel{+}{\mathrm{N}} \mathrm{H}_3,-\mathrm{F}$

Which of the following has the least octane number?

The common name and IUPAC name of $\mathrm{CH}_3 \mathrm{CH}_2-\mathrm{C} \equiv \mathrm{CH}$, respectively are

In the reaction ${C_2}{H_6}\xrightarrow{{{{\left( {C{H_3}COO} \right)}_2}Mn}}A\xrightarrow{{NaOH}}B,$ the correct statement about $B$ is

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

In the following sequence the product D is,

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

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 :

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

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

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

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:

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.

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.

The neutral wax called Ozokerite found near petroleum well is a mixture of:

Which of the compounds with molecular formula ${C_5}{H_{10}}$ yields acetone on ozonalysis

Iodination of alkanes is always carried out in the presence of some oxidising agents like ${HIO}_3$. This is because

Which among the following is very strong $o - ,\,p -$ directing group?

Assertion :- Neopentane forms only one monosubstituted compound.

Reason :- It has only one type of carbon atoms.

When benzene is heated in air, it burns with sooty flame producing $X$ and $Y$, as shown in the given reaction: $\mathrm{C}_6 \mathrm{H}_6+\frac{15}{2} \mathrm{O}_2 \longrightarrow X+Y.\quad$Here, $X$ and $Y$ refer to

S-I: Both Benzene $\&$ ethyne give same product on ozonolysis.
S-II: Ethyne $\&$ benzene possess same emperical formula.

Which of the following reaction do not give alkyne :-

Which alkane (molecular mass = 72) would yield only three mono chlorinated derivates