NEET Practice Questions - Chemistry - Haloalkanes and Haloarenes

When CH₃CH₂CHCl₂ is treated with NaNH₂, the product formed is                             

(a) CH₃-CH=CH₂                     (b) CH₃-C$\equiv$CH

(c) CH₃CH₂CH${<}_{{\mathrm{NH}}_2}^{{\mathrm{NH}}_2}$                  (d) CH₃CH₂C${<}_{{\mathrm{NH}}_2}^{\mathrm{Cl}}$

R-CH₂-CCl₂-R $\stackrel{\mathrm{Reagent}}{\to }$R-C$\equiv$C-R. The reagent is

(a) Na                                   (b) HCl in H₂O

(c) KOH in C₂H₅OH                (d) Zn in alcohol

Ethyl chloride is converted into diethyl ether by                                                  

(a) Wurtz reaction                           (b) Grignard reaction

(c) Perkin's reaction                         (d) Williamson's synthesis

The alkyl halide is converted into an alcohol by                                    

(a) addition                       (b) substitution

(c) dehydrohalogenation     (d) elimination

Propan-1-ol may be prepared by reaction of propene with                            

(a)  CH₃-COOH                   (b) H₃BO₃

(c) B₂H₆/NaOH-H₂O₂         (d) H₂SO₄/H₂O

What is formed when a primary alcohol undergoes catalytic dehydrogenation?

(a) Aldehyde        (b) Ketone        (c) Alkene             (d) Acid 

In ${\mathrm{S}}_{{\mathrm{N}}^2}$ reactions, the correct order of reactivity for the following compounds : ${\mathrm{CH}}_3\mathrm{Cl}$, ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Cl}$, ${\left({\mathrm{CH}}_3\right)}_2\mathrm{CHCl}$ and ${\left({\mathrm{CH}}_3\right)}_3\mathrm{CCl}$ is :

(a) ${\mathrm{CH}}_3\mathrm{Cl}$>${\left({\mathrm{CH}}_3\right)}_2\mathrm{CHCl}$>${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Cl}$>${\left({\mathrm{CH}}_3\right)}_3\mathrm{CCl}$

(b) ${\mathrm{CH}}_3\mathrm{Cl}$>${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Cl}$>${\left({\mathrm{CH}}_3\right)}_2\mathrm{CHCl}$>${\left({\mathrm{CH}}_3\right)}_3\mathrm{CCl}$

(c) ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Cl}$>${\mathrm{CH}}_3\mathrm{Cl}$>${\left({\mathrm{CH}}_3\right)}_2\mathrm{CHCl}$>${\left({\mathrm{CH}}_3\right)}_3\mathrm{CCl}$

(d) ${\left({\mathrm{CH}}_3\right)}_2\mathrm{CHCl}$>${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Cl}$>${\mathrm{CH}}_3\mathrm{Cl}$>${\left({\mathrm{CH}}_3\right)}_3\mathrm{CCl}$

A compound A of formula C₃H₆Cl₂ on reaction with alkali can give B of formula C₃H₆O or C of formula C₃H₄. B on oxidation gave a compound of the formula C₃H₆O. C with dilute H₂SO₄ containing Hg²⁺ ion gave D of formula C₃H₆O, which with bromine and NaOH gave the sodium salt of C₂H₄O₂. Then A is :

(a) CH₃CH₂CHCl₂

(b) CH₃CCl₂CH₃

(c) CH₂ClCH₂CH₂Cl

(d) CH₃CHClCH₂Cl

Which set fo reagents will produce freon (${\mathrm{CCl}}_2{\mathrm{F}}_2$)?

(a) C + ${\mathrm{F}}_2$ + ${\mathrm{Cl}}_2$$\to$                     

(b) ${\mathrm{CH}}_3\mathrm{Cl}$ + ${\mathrm{F}}_2$$\to$

(c) ${\mathrm{CCl}}_4$ + HF $\stackrel{{\mathrm{SbCl}}_5}{\to }$                 

(d) ${\mathrm{CCl}}_4$ + ${\mathrm{F}}_2$$\to$

X $\stackrel{{\mathrm{Cl}}_2}{\to }$ Benzotrichloride $\stackrel{\mathrm{Hydrolysis}}{\to }$ Y

X and Y respectievely are:

(a) benzene, benzaldehyde

(b) toluene, benzaldehyde

(c) toluene, benzoic acid

(d) benzene, benzoic acid