Chapter 25

\(2-\) chlorobutane is treated with alcoholic \(\mathrm{KOH}\). Number of alkenes formed is

\(0-\) Xylene is methylated to get trimethyl benzene. The number of possible isomers is

Find the total number of monochlorinated products formed from the pure reactant given below: C=CC(C)C \(\left(-14^{14} \mathrm{C}-\right.\) atom \()\)

\(\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{3} \stackrel{\mathrm{HBr}}{\longrightarrow}\) product (s). Number of products possible in the above reaction is

Of the following reagents the number of them which will react with \(\mathrm{CH}_{3} \mathrm{MgBr}\) to give \(\mathrm{CH}_{4}\) is \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}, \mathrm{CH}_{3} \mathrm{SH}, \mathrm{CH}_{3} \mathrm{NH}_{2}, \mathrm{RC} \equiv \mathrm{CR}, \mathrm{HCHO}\) \(\mathrm{RC} \equiv \mathrm{CH}\)

Total number of monochlorination products that can be obtained on treating 1 - butene with \(\mathrm{Cl}_{2}\) in presence of light is

In an experimental determination of active hydrogens in an organic compound (Z), \(0.450 \mathrm{~g}\) of compound (Z) was treated with excess of \(\mathrm{CH}_{3} \mathrm{MgBr}\) when \(224 \mathrm{ml}\) of \(\mathrm{CH}_{4}\) was evolved at NTP. Compound (Z) has molar mass equal to \(90 \mathrm{~g}\) per mole. How many active hydrogens are present per molecule of the compound (Z)?

On mixing a certain alkane with chlorine and irradiating it with ultraviolet light, it forms only one monochloroalkane. This alkane could be (a) propane (b) pentane (c) isopentane (d) neopentane

Which one of the following has the minimum boiling point? (a) \(\mathrm{n}\)-butane (b) 1-butyne (c) 1 -butene (d) iso-butene

Acid catalysed hydration of alkenes except ethene leads to the formation of (a) primary alcohol (b) secondary or tertiary alcohol (c) mixture of primary and secondary alcohols (d) mixture of secondary and tertiary alcohols

Elimination of bromine from 2-bromobutane results in the formation of (a) equimolar mixture of 1 and 2 -butene (b) predominantly 2 -butene (c) predominantly 1-butene (d) predominantly 2-butyne

Reaction of one molecule of HBr with one molecule of 1,3 -butadiene at \(40^{\circ} \mathrm{C}\) gives predominantly [2005] (a) 3-bromobutene under kinetically controlled conditions (b) 1-bromo-2-butene under thermodynamically controlled conditions(c) 3-bromobutene under thermodynamically controlled conditions (d) 1-bromo-2-butene under kinetically controlled conditions.

HBr reacts with \(\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{OCH}_{3}\) under anhydrous conditions at room temperature to give (a) \(\mathrm{CH}_{3} \mathrm{CHO}\) and \(\mathrm{CH}_{3} \mathrm{Br}\) (b) \(\mathrm{BrCH}_{2} \mathrm{CHO}\) and \(\mathrm{CH}_{3} \mathrm{OH}\) (c) \(\mathrm{BrCH}_{2}-\mathrm{CH}_{2}-\mathrm{OCH}_{3}\) (d) \(\mathrm{H}_{3} \mathrm{C}-\mathrm{CHBr}-\mathrm{OCH}_{3}\)

The structure of the compound that gives a tribromo derivative on treatment with bromine water is [2006]\\} (a) Cc1cccc(O)c1 (b) OCc1ccccc1 (c) Cc1ccccc1O (d) Cc1ccc(O)cc1

The compound formed as a result of oxidation of ethyl benzene by \(\mathrm{KMnO}_{4}\) is: [2007] (a) acetophenone (b) benzoic acid (c) benzyl alcohol (d) benzophenone

The treatment of \(\mathrm{CH}_{3} \mathrm{MgX}\) with \(\mathrm{CH}_{3} \mathrm{C} \equiv \mathrm{C}-\mathrm{H}\) pro- duces (a) \(\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2}\) (b) \(\mathrm{CH}_{3} \mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{3}\) (c) CC=CC (d) \(\mathrm{CH}_{4}\)

In the following sequence of reactions, the alkene affords the compound 'B' \(\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CHCH}_{3} \stackrel{\mathrm{O}_{3}}{\longrightarrow}(\mathrm{A}) \stackrel{\mathrm{H}_{2} \mathrm{O}}{\longrightarrow}\) (B) \(\mathrm{Zn}\) The compound (B) is [2008] (a) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHO}\) (b) \(\mathrm{CH}_{3} \mathrm{COCH}_{3}\) (c) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}_{3}\) (d) \(\mathrm{CH}_{3} \mathrm{CHO}\)

The alkene that exhibits geometrical isomerism is: [2009] (a) 2-methyl propene (b) 2 -butene (c) 2-methyl-2-butene (d) propene

vOne mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molcular mass of \(44 \mathrm{u}\). The alkene is (a) Propene (b) 1 -butene (c) 2 -butene (d) ethane

The main product of the following reaction is \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CH}_{2} \mathrm{CH}(\mathrm{OH}) \mathrm{CH}\left(\mathrm{CH}_{3}\right)_{2} \stackrel{\text { conc. } \mathrm{H}_{2} \mathrm{SO}_{4}}{\longrightarrow}\) ? (a) CC=CC(C)C (b) CC(C)=CCc1ccccc1 (c) CC(C)C=CCc1ccccc1 (d) CCC(Cl)(Cl)CCl

Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of (a) a vinyl group (b) an isopropyl group (c) an acetylenic triple bond (d) two ethylenic double bonds

2-Hexyne gives trans \(-2\) - Hexene on treatment with [2012] (a) \(\mathrm{Pd} / \mathrm{BaSO}_{4}\) (b) \(\mathrm{Li} / \mathrm{NH}_{3}\) (c) \(\mathrm{Pt} / \mathrm{H}_{2}\) (d) \(\mathrm{LiAlH}_{4}\)

Which branched chain isomer of the hydrocarbon with molecular mass \(72 \mathrm{u}\) gives only one isomer of mono substituted alkyl halide? [2012] (a) Isohexane (b) Neopentane (c) Tertiary butyl chloride

A gaseous hydrocarbon given upon combustion \(0.72 \mathrm{~g}\) of water and \(3.08 \mathrm{~g}\) of \(\mathrm{CO}_{2}\). The empirical formula of the hydrocarbon is (a) \(\mathrm{C}_{6} \mathrm{H}_{5}\) (b) \(\mathrm{C}_{7} \mathrm{H}_{8}\) (c) \(\mathrm{C}_{2} \mathrm{H}_{4}\) (d) \(\mathrm{C}_{3} \mathrm{H}_{4}\)