91Ó°ÊÓ

The starting substance for the preparation of iodoform is any one of the following, except (a) \(\mathrm{CH}_{3} \mathrm{CH}(\mathrm{OH}) \mathrm{CH}_{3} \quad\) (b) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}\) (c) \(\mathrm{HCH}_{2} \mathrm{OH}\) (d) \(\mathrm{CH}_{3} \mathrm{COCH}_{3}\)

Of the following compounds, the one with the lowest boiling point is (a) Pentyl chloride (b) Tertiary butyl chloride (c) Isobutyl chloride (d) \(\mathrm{n}\) -butyl chloride

Chlorobenzene on heating with \(\mathrm{NH}_{3}\) under pressure in the presence of cuprous chloride gives (a) Nitrobenzen (b) Aniline (c) Benzamide (d) o-and p-chloroaminobenzene

The most reactive halide towards \(\mathrm{S}_{\mathrm{N}} 1\) reaction is (a) Sec-butyl chloride (b) Tert-butyl chloride (c) \(\mathrm{n}\) -butyl chloride (d) allyl chloride

The number of dibromo derivatives of propane are (a) 5 (b) 4 (c) 3 (d) 2

1,1 -dibromoethane when heated with zinc dust produces (a) Ethyl bromide (b) Ethene (c) Vinyl bromide (d) 2 -butene

Fluorobenzene \(\left(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~F}\right)\) can be synthesized in the laboratory (a) By heating petrol with HF and KF (b) From aniline by diazotization followed by heating the diazonium salt with \(\mathrm{HBF}_{4}\) (c) By direct fluorination of benzene with \(\mathrm{F}_{2}\) gas (d) By reacting bromobenzene with NaF solution

A yellow product is formed when an organic compound \(\mathrm{C}_{3} \mathrm{H}_{8} \mathrm{O}\) is warmed with aqueous sodium carbonate and iodine solution. The product formed is (a) Iodoform (b) Sodium iodate (c) Sodium iodide (d) Adduct of \(\mathrm{NaI}\) and \(\mathrm{C}_{3} \mathrm{H}_{8} \mathrm{O}\)

In the reaction of p-chlorotoluene with \(\mathrm{KNH}_{2}\) in liquid \(\mathrm{NH}_{3}\), the major product is (a) o-toluidine (b) \(\mathrm{m}\) -toluidine (c) p-toluidine (d) p-chloroaniline

Iodoform test is not given by (a) 2 -pentanone (b) Ethanol (c) Ethanal (d) 3-pentanone