Hydrocarbons - Organic Chemistry - Chemistry Previous Year Questions

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

$$\text { Identify ' } Z \text { ' in the following reaction sequence }$$

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

The rate of attack of an electrophile is least when $X$ in the given compound is

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 aromatic compound/species with maximum number of $\pi$-electrons is

An alkene $X$ on ozonolysis gives a mixture of propan-2-one and methanal. What is $X$ ?

$$\text { In the conversion of } A \text { to } B \text {, the electrophile involved is }$$

Which of the following can be used as the test for unsaturation with regard to colour change of reaction?

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 one of the following methods is suitable to generate aromatic compound(s) from linear aliphatic saturated hydrocarbons with at least six carbon atoms?

Ethyl phenyl acetylene (1-phenyl-1-butyne) on reduction with partially deactiveated palladised charcoal (Lindlar's catalyst) gives

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

$$\text { Glucose } \frac{\text { (i) } \mathrm{HI}, \Delta}{\text { (ii) } \mathrm{Mo}_2 \mathrm{O}_3, 773 \mathrm{~K}, 10 \cdot 20 \mathrm{am}}$$