Haloalkanes and Haloarenes Chapter-Wise Test 13

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which halide reacts fastest with \( \ce{AgNO3} \) in ethanol?

\( \ce{AgNO3} \) in ethanol tests \( \ce{S_N1} \) reactivity. \( \ce{(CH3)3CBr} \) (tertiary) forms a stable carbocation, reacting fastest.

\( \ce{CH3CH2Br} \)
\( \ce{CH3CHBrCH3} \)
\( \ce{CH3Br} \)
\( \ce{(CH3)3CBr} \)
4

How many monochloro isomers are possible for \( \ce{CH3CH2CH2CH2CH3} \)?

Pentane (\( \ce{CH3CH2CH2CH2CH3} \)) has three unique carbon positions for Cl substitution (C1/C5, C2/C4, C3), yielding 3 isomers.

2
4
3
5
3

What is the product when \( \ce{CH3CH2CH2Br} \) reacts with \( \ce{KCN} \) in ethanol?

\( \ce{KCN} \) substitutes Br in \( \ce{CH3CH2CH2Br} \) via \( \ce{S_N2} \), forming \( \ce{CH3CH2CH2CN} \) (butanenitrile).

\( \ce{CH3CH2CH3} \)
\( \ce{CH3CH2CH2OH} \)
\( \ce{CH3CH=CH2} \)
\( \ce{CH3CH2CH2CN} \)
4

What is the product when \( \ce{CH3CH2CH2CHOHCH3} \) reacts with \( \ce{PCl5} \)?

\( \ce{PCl5} \) converts 2-pentanol (\( \ce{CH3CH2CH2CHOHCH3} \)) to 2-chloropentane (\( \ce{CH3CH2CH2CHClCH3} \)) via substitution.

\( \ce{CH3CH2CH2CH2CH3} \)
\( \ce{CH3CH2CH=CHCH3} \)
\( \ce{CH3CH2CH2CHClCH3} \)
\( \ce{CH3CH2CH2CH2Cl} \)
3

Which compound is formed when toluene reacts with \( \ce{Cl2} \) in the presence of \( \ce{FeCl3} \)?

Toluene (\( \ce{C6H5CH3} \)) undergoes electrophilic substitution with \( \ce{Cl2} \) and \( \ce{FeCl3} \), forming \( \ce{CH3C6H4Cl} \) (chlorotoluene, mainly para).

\( \ce{C6H5CH2Cl} \)
\( \ce{C6H5Cl} \)
\( \ce{CH3C6H4Cl} \)
\( \ce{C6H6} \)
3

Which compound is formed when aniline reacts with \( \ce{NaNO2} \) and \( \ce{HBr} \), followed by \( \ce{CuBr} \)?

The Sandmeyer reaction converts aniline to bromobenzene (\( \ce{C6H5Br} \)) via a diazonium salt with \( \ce{CuBr} \).

\( \ce{C6H5Cl} \)
\( \ce{C6H6} \)
\( \ce{C6H5Br} \)
\( \ce{C6H5I} \)
3

What is the product when benzene reacts with \( \ce{CH3CH2CH2Cl} \) and \( \ce{AlCl3} \)?

Friedel-Crafts alkylation of benzene with \( \ce{CH3CH2CH2Cl} \) and \( \ce{AlCl3} \) forms \( \ce{C6H5CH2CH2CH3} \) (propylbenzene).

\( \ce{C6H5Cl} \)
\( \ce{C6H5CH2CH2CH3} \)
\( \ce{C6H5CH(CH3)2} \)
\( \ce{C6H6} \)
2

Which reagent is used to prepare \( \ce{CH3CH2Cl} \) from \( \ce{CH3CH2OH} \) with \( \ce{ZnCl2} \)?

\( \ce{HCl} \) with \( \ce{ZnCl2} \) (a Lewis acid) converts ethanol to ethyl chloride (\( \ce{CH3CH2Cl} \)) by facilitating substitution of the \( \ce{OH} \) group.

\( \ce{HCl} \)
\( \ce{HBr} \)
\( \ce{SOCl2} \)
\( \ce{PCl5} \)
1

What is the product when \( \ce{CH2=CH2} \) reacts with \( \ce{Cl2} \) in \( \ce{CCl4} \)?

Chlorine adds across the double bond of ethene in a non-polar solvent like \( \ce{CCl4} \), forming 1,2-dichloroethane (\( \ce{CH2ClCH2Cl} \)).

\( \ce{CH2ClCH2Cl} \)
\( \ce{CH3CH2Cl} \)
\( \ce{CH2=CHCl} \)
\( \ce{CHCl2CH3} \)
1

Which halide forms \( \ce{CH3CH2CH2CH2CH2NH2} \) when treated with excess \( \ce{NH3} \) followed by heating?

\( \ce{CH3CH2CH2CH2CH2I} \) reacts with excess \( \ce{NH3} \) via \( \ce{S_N2} \) to form \( \ce{CH3CH2CH2CH2CH2NH2} \) (pentylamine) after heating.

\( \ce{CH3CH2CH2Cl} \)
\( \ce{CH3CH2CHBrCH3} \)
\( \ce{(CH3)3CCH2Cl} \)
\( \ce{CH3CH2CH2CH2CH2I} \)
4

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