Haloalkanes & Haloarenes Questions

Which of the following reactions is expected to take place by SN2 mechanism ?

Pick out the incorrect equation -

In which of the following cases will the product of the reaction respond positively to the iodoform test ?

Which of the following will give a yellow precipitate of iodoform on heating with I₂ and dilute NaOH ?

(R)-2-Bromobutane is allowed to react with aqueous KOH. Identify the product formed -

Neopentyl bromide is allowed to react with sodium ethoxide in ethanol. The major product formed in the reaction is -

In the reaction the major product formed is -

Consider the following reaction sequence. The major end product formed is -

Which of the following does not produce a white precipitate of AgCl on warming with alcoholic silver nitrate ?

Isobutylmagnesium bromide in dry ether on reaction with absolute alcohol gives -

The order of reactivity of the following halides towards hydrolysis by aqueous KOH is

In the following reaction tert-Butyl bromide + HC≡CNa → the substrate is transformed into -

Consider the following reaction sequence. The products (A) and (B) are, respectively -

Consider the following reaction. The product formed is -

In the preparation of ethyl chloride by the reaction the major reason for using anhydrous ZnCl₂ as a catalyst is that -

The order of decreasing SN1 reactivities of the halides I : CH₃CH₂CH₂Cl II : CH₂=CHCHClCH₃ III : CH₃CH₂CHClCH₃ is -

Consider the following sequence of reactions. The products (X) and (Y) are, respectively -

An aromatic primary amine (A) is heated with another compound (B) in the presence of alcoholic KOH to give a bad-smelling compound having the formula C₆H₅NC. The compound (B) can be prepared by heating another compound (C) with chlorine and slaked li

2-Bromopentane is heated with potassium ethoxide in ethanol. The major product is -

Which of the following reactions is not expected to give a satisfactory yield of alkyl iodide -

Which of the following processes does not occur during the formation of CHCl₃ from C₂H₅OH and bleaching powder -

Which of the following reactions will not give an isocyanide -

Neopentyl bromide is allowed to react with sodium ethoxide in ethanol. The major substitution product formed in the reaction is -

A compound (X), C₄H₈Cl₂, on hydrolysis with aqueous KOH gives a product (Y) which on heating with I₂ and dilute NaOH gives a yellow precipitate of iodoform. The compound (X) is -

Consider the following sequence of reactions. The compound (A) is -

Consider the following reaction sequence. The product (A) and (B) are, respectively -

In the reaction RCOOAg + Br₂ RBr + CO₂ + AgBr The intermediate formed is -

R–X R–NO₂ The reagent Z in the above reaction is -

The strengths of carbon-halogen bonds follow the order -

The free radical substitution mechanism operates in the reaction between -

The ease of dehydrohalogenation with alcoholic KOH in case of chloroethane (I), 2-chloropropane (II), and 2-chloro-2-methylpropane (III) is of the order -

The reaction sequence A and C in the above sequence are respectively -

Arrange the following in decreasing order of C-halogen bond length -

Racemic mixture is obtained due to halogenation of -

Which of the following on alkaline hydrolysis gives ethanal -

In the reaction CH₃CHCl₂ X. X is -

A biradical is formed in the reaction -

For CH₃Br + OH- ⟶ CH₃OH + Br- the rate of reaction is given by the expression -

The reactivities of CH₃Cl, CH₃CH₂CH₂Cl and chlorobenzene are in the order -

Unimolecular nucleophilic substitution [SN1] involves ............... steps, while bimolecular nucleophilic substitution involves ............... steps

(CH₃)₃CBr + OH- ⟶ (CH₃)₃COH + Br- Which of the following statements is true for the above reaction -

CCl₄ is used in fire extinguishers under the name -

Which of the following reaction does not take place ?

Alkyl halides are almost never prepared by -

(R)-2-Bromooctane X Product X is

Chloroform is used as a laboratory reagent for testing the presence of -

In the Hunsdiecker reaction the compound (CH₃)₃C–COOAg is heated with -

A + PCl₅ ─────────▶ POCl₃ + Alkyl halide. Compound A would be -

Treatment of ethylidene chloride with aq. KOH gives -

The iodoform test is used to show one particular structural unit in -