Hydrocarbons practice · Mixed difficulty

Select the organic compounds aliphatic in nature but burn with smoky flame :

The compound that will react most readily with gaseous bromine has the formula:

Acetylenic hydrogens are acidic because

Lindlar’s catalyst is:

Which among the following are used as catalyst in cracking?

The product obtained at anode upon Kolbe's electrolysis of sodium ethanoate is

Compound 'X' on treatment with $\mathrm{O}_3$ followed by $\mathrm{Zn} / \mathrm{H}_2 \mathrm{O}$ gives methanal and cyclohexyl methanal. The compound 'X' is:

Consider the following statements : A hydrocarbon of molecular formula ${C}_5 {H}_{10}$ is a

I. monosubstituted alkene

II. disubstituted alkene

III. trisubstituted alkene

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

The olefin which on ozonolysis gives $\mathrm{C}{\mathrm{H}_3}\mathrm{C}{\mathrm{H}_2}\mathrm{CHO}\;and\;\mathrm{C}{\mathrm{H}_3}\mathrm{CHO}$ is:

An isomer of ${C}_6 {H}_{14}$ forms three monochloro derivatives. The isomer may be (Excluding stereo isomer)

Assertion :- In the following reaction ${\text{C}}{{\text{H}}_2}{\text{ = C}}{{\text{H}}_{\text{2}}} + {\text{NaN}}{{\text{H}}_{\text{2}}} \to {\text{C}}{{\text{H}}_{\text{2}}} = \mathop {\text{C}}\limits^ - {\text{H}}\mathop {{\text{Na}}}\limits^ + + {\text{N}}{{\text{H}}_{\text{3}}}$
reaction is always in forward direction
Reason :-Ethene is stronger acid than ammonia.

The compound ${\left( {\mathrm{C}{\mathrm{H}_3}} \right)_2}\mathrm{CH}-\mathrm{CHCl}-\mathrm{C}{\mathrm{H}_3}$ reacts with alcoholic KOH to give the following alkene:

Butyne-2 contains:

Which of the following compounds will show cis-trans isomerism?

Which of the following statement is incorrect regarding nitration of aromatic compounds?

I. The rate of nitration of benzene decreases at 323-333 K.

II. The rate of nitration of toluene is greater than that of benzene.

III. The rate of nitration of chlorobenzene is greater than that of benzene.

IV. Nitration is an electrophilic substitution reaction. Choose the incorrect statement.

A fuel contains 25% $n$-heptane and 75% iso-octane. Its octane number is:

The number of isomeric xylenes is:

2-Hexyne can be converted into trans-2-hexene
by the action of:

The alkane that gives only one mono-chloro product on chlorination with $C{l_2}$ in presence of diffused sunlight is

Pure methane can be produced by

Which of the following does not decolourise bromine solution in carbon disulphide?

Statement I : The boiling point of alkanes increases steadily with increase in size of chain
Statement II : Greater the length of the chain, greater is the surface area and hence, larger the vander Waal's attractive forces

$\mathrm{CH} \equiv \mathrm{CH} \xrightarrow[\mathrm{Cu}_2 \mathrm{Cl}_2]{\mathrm{NH}_4 \mathrm{Cl}} \text{product}$

Product is:

The electrophile involved in chlorination of benzene is

The alkyne which gives pyruvic acid $\left( {\mathrm{C}{\mathrm{H}_3}\mathrm{COCOOH}} \right)$ on oxidation with alk. $\mathrm{KMn}{\mathrm{O}_4}$ is:

Assertion (A): In the electrophilic substitution of aryl halides, the incoming electrophile gets attached to the meta position.

Reason (R): Aryl halides are moderately deactivating.

${\mathrm{C}_6}{\mathrm{H}_{12}}$ on addition of HBr in presence and in absence of peroxide gives some product.

It is :

(A): Ethene is more reactive than ethane
(R): $\mathrm{C}=\mathrm{C}$ bond energy in ethene is more than that in ethane

A chlorohydrocarbon, named chlorodane is used especially as:

Propyne does not react with