Hydrocarbons · Chemistry · TS EAMCET
MCQ (Single Correct Answer)
' $X$ ' is the isomer of $\mathrm{C}_6 \mathrm{H}_{14}$. It has four primary carbons and two tertiary carbons, ' $X$ ' can be prepared from which of the following reactions?
$$ \begin{aligned} &\text { What are } X \text { and } Y \text { in the following reaction sequence? }\\ &\mathrm{C}_5 \mathrm{H}_{12} \mathrm{O} \xrightarrow[573 \mathrm{~K}]{\mathrm{Cu}} \mathrm{C}_5 \mathrm{H}_{10} \xrightarrow[\text { (ii) } \mathrm{Zn}+\mathrm{H}_2 \mathrm{O}]{\text { (i) } \mathrm{O}_3} X+Y \end{aligned} $$
$$ \text { Match the following } $$
The correct answer is
Chlorobenzene when subjected to fittig reaction gives a compound ' $X$ '. The sum of $\sigma$ and $\pi$ - bonds in $X$ is
Cumene on oxidation in air gives a compound, $X$. This on reaction with dilute acid gives $Y$ and $Z . Y$ reacts with sodium metal and not $Z$. What is $Z$ ?
Arrange the following in decreasing order of their boiling points
(A) 2-methylbutane
(B) 2, 2-dimethyl propane
(C) Pentane
(D) Hexane
An alkyne has the molecular formula $\mathrm{C}_6 \mathrm{H}_{10}$. The number of 1 -alkyne isomers (excluding stereoisomers) possible for it is
Dehydration of an organic acid $X$ with concentrated $\mathrm{H}_2 \mathrm{SO}_4$ at 373 K gives $\mathrm{H}_2 \mathrm{O}$ and gas $Y$. The hybridisation of the carbon in $Y$ and nature of $Y$ are respectively.
Consider the given sequence of reactions,
$$ \mathrm{C}_2 \mathrm{H}_6+\frac{3}{2} \mathrm{O}_2 \xrightarrow[\Delta]{(\mathrm{CH}, \mathrm{COO})_2 \mathrm{Mn}} X \xrightarrow{\mathrm{Na}} Y $$
Electrolysis of aqueous solution of $Y$ gives gases $P$ and $Q$ at anode. $P$ and $Q$ are respectively
Which of the following is an example of electrophilic substitution reaction?
An alkene $X$ on ozonolysis gives a mixture of simplest ketone $(Y)$ and 3-pentanone. The IUPAC name of the alkene $X$ is
Ethylene on reaction with cold, dilute alkaline $\mathrm{KMnO}_4$ at 273 K gives a compound ' $P$ '. This on polymerisation with which of the following gives dacron?
Consider the following sequence of reaction. In ' $Z$ ' the number of $s p^3$ carbons is ' $a$ ' and $s p^2$ carbons is ' $b$ '. Value of $(a+b)$ is
For the alkyne with formula $\mathrm{C}_6 \mathrm{H}_{10}$, the number of alkynes with acidic hydrogens is $x$ and number of alkynes with no acidic hydrogens is $y . x$ and $y$ are respectively
$$ \left(\mathrm{CH}_3\right)_3 \mathrm{CH} \xrightarrow{\mathrm{KMnO}_4} X \xrightarrow[573 \mathrm{~K}]{\mathrm{Cu}} Y $$
The number of $s p^3$ and $s p^2$ carbons in $Y$ are respectively
Consider the following reaction sequence
$ \text { 2-methylpropane } \xrightarrow{\mathrm{KMnO}_{4}} X \xrightarrow[358 \mathrm{~K}]{20 \% \mathrm{H}_3 \mathrm{PO}_4} Y \xrightarrow[\text { (ii) } \mathrm{Zn} / \mathrm{H}_{2} \mathrm{O}]{\text { (i) } \mathrm{O}_{3}} A+B \text {. } $
What are $A$ and $B$ ?
What are $Y$ and $Z$ respectively in the given reaction sequence?
The alkane which is next to methane in homologous series can be prepared from which of the following reactions?
$ \text { I. } 2 \mathrm{CH}_{3} \mathrm{Br} \xrightarrow[\text { Dry ether }]{\mathrm{Na}} $
II. $\mathrm{CH}_{3} \mathrm{COOH} \xrightarrow[\mathrm{CaO}, \Delta]{\mathrm{NaOH}}$
III. $\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CH}_{2} \xrightarrow{\mathrm{H}_{2} / \mathrm{Pt}}$ IV. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Br} \xrightarrow[\mathrm{H}^{+}]{\mathrm{Zn}}$
What is ' $ Y $ ' in the following set of reactions?
$$ \mathrm{C}_3 \mathrm{H}_4 \xrightarrow[\substack{\mathrm{Hg}^{2+} / \mathrm{H}^{+} \\ 333 \mathrm{~K}}]{\mathrm{H}_2 \mathrm{O}} X \xleftarrow[\substack{\text { (ii) } \mathrm{Zn}+\mathrm{H}_2 \mathrm{O}}]{\text { (i) } \mathrm{O}_3} Y $$
$X$ and $Z$ respectively in the following reaction sequence are $\mathrm{C}_3 \mathrm{H}_6 \xrightarrow{X} Y \xrightarrow[\mathrm{AlCl}_3]{\mathrm{C}_6 \mathrm{H}_6} Z$ (Major projuct)
Arrange the following in the correct order of their acidic strength.
I. $\mathrm{H}_2 \mathrm{C}=\mathrm{CH}_2$
II. $\mathrm{CH} \equiv \mathrm{CH}$
III. $\mathrm{CH}_3-\mathrm{C} \equiv \mathrm{CH}$
IV. $\mathrm{CH}_3-\mathrm{CH}_3$
$$ \mathrm{C}_3 \mathrm{H}_4+\mathrm{H}_2 \mathrm{O} \xrightarrow[333 \mathrm{~K}]{\mathrm{Hg}^{2+} / \mathrm{H}^{+}}[X] \stackrel{\text { Tautomerisation }}{\rightleftharpoons} Y $$
$X$ and $Y$ are respectively
Addition of HBr to propene in presence of a peroxide takes place contrary to Markownikoff rule. This can be explained by the mechanism involving
The rate of attack of an electrophile is least when $X$ in the given compound is
The aromatic compound/species with maximum number of $\pi$-electrons is
$$ \text { In the conversion of } A \text { to } B \text {, the electrophile involved is } $$
An alkene $X$ on ozonolysis gives a mixture of propan-2-one and methanal. What is $X$ ?
An alkene $X\left(\mathrm{C}_6 \mathrm{H}_{12}\right)$ on ozonolysis gave acetaldehyde and ethyl methyl ketone. What is the product formed when $X$ reacts with HBr ?
An alkene $X$ with formula $\mathrm{C}_4 \mathrm{H}_8$ does not exhibit geometrical isomerism. In the conversion of $X$ to $Y$, the correct sequence of reagents $A$ and $B$ used are ( $Y$ gives iodoform test)
An alkene $(X)$ on ozonolysis gives propanal and ethanal. What is $X$ ?
Match the following.
The correct answer is
$$ \text { Identify ' } Z \text { ' in the following reaction sequence } $$
The functional groups in $X$ and $Y$ are respectively.
The organic compound 5-allylcyclohex-3-ene-1-ol is reacted with cold, dilute, aqueous solution of $\mathrm{KMnO}_4$. The total number of hydroxyl group(s) $(-\mathrm{OH})$ present in the product is
The molecular formula of the product formed when benzene is reacted with excess of chlorine molecules under ultra-violet light is
The order of decreasing reactivity towards an electrophilic reagent, for the following compounds, is
(i) benzene
(iii) chlorobenzene
(ii) toluene
(iv) phenol
The major product of the following reaction is
$$ \text { Glucose } \frac{\text { (i) } \mathrm{HI}, \Delta}{\text { (ii) } \mathrm{Mo}_2 \mathrm{O}_3, 773 \mathrm{~K}, 10 \cdot 20 \mathrm{am}} $$
The major products $P$ and $Q$ in the following reactions, respectively, are
The major product formed in the following reaction sequence is
The most suitable solvent for Wurtz reaction is
The correct order of rate of addition of $\mathrm{Br}_2$ /water to the following alkenes is
When $\mathrm{CH}_3 \mathrm{Br}$ and $\mathrm{C}_2 \mathrm{H}_5 \mathrm{Br}$ are subjected to Wurtz reaction, the maximum number of possible alkane product(s) formed is/are
Maximum number of bromine atoms present in the final product $P$ upon complete bromination are
The reaction of one mole of 3-ethyl-3-methylpenta-1, 4-diene with $\mathrm{O}_3$ and then with $\mathrm{Zn} / \mathrm{H}_2 \mathrm{O}$, gives
The major products $P$ and $Q$ from the below reactions are :
$$ \mathrm{CH}_3 \mathrm{CH}=\mathrm{CH}_2 \xrightarrow{\mathrm{HBr}} P $$
Which of the following sets of functional groups is meta-directing group?
The correct order of reactivity of hydrogen halides with propene is
A benzene derivative did not produce white precipitate with the ammonical silver nitrate solution but decolorised the cold dilute alkaline $\mathrm{KMnO}_4$ solution. The compound is
Which of the following can be used as the test for unsaturation with regard to colour change of reaction?
Ethyl phenyl acetylene (1-phenyl-1-butyne) on reduction with partially deactiveated palladised charcoal (Lindlar's catalyst) gives
Which one of the following methods is suitable to generate aromatic compound(s) from linear aliphatic saturated hydrocarbons with at least six carbon atoms?