Which of the following compound will give positive iodoform test?
Isopropyl alcohol
Propionaldehyde
Ethylphenyl ketone
Benzyl alcohol
The conversion of ethyl bromide using sodium iodide and dry acetone, this reaction is known as
Swarts reaction
Finkelstein reaction
Sandmeyer reaction
Stephen reaction
X and Y in the below reaction are .... and .... respectively
C6H5 - CO2H + X C6H5 - COCl
SOCl2 and C6H5CHO
(COCl)2 and C6H5CH3
SOCl2 and C6H5CH3
(COCl)2 and C6H5CH2OH
The correct order of increasing reactivity of the following alkyl halides, CH3CH2CH(Br)CH3
(I) CH3CH2CH(Br)CH3
(II) (CH3)2CClCH2CH3
(III) CH3CH2CH2Cl and
(IV) Towards SN2 displacement is
I < II < III < IV
III < I < IV < II
III < I < II < IV
II < IV < I < III
4-nitrotoluene is treated with bromine to get compound 'P' which is reduced with Sn and HCl to get compound 'Q'. 'Q' is diazotised and the product is treated with phosphinic acid to get compound 'R'. 'R' is oxidised with alkaline solution KMnO4 to get the final product. Identify the final product.
2-bromobenzoic acid
2-bromo-4-hydroxybenzoic acid
benzoic acid
3-bromobenzoic acid
A.
2-bromobenzoic acid
Step 1: Since, NO2 is m-directing group while -CH3 group is o- and p- directing group. Thus, Br group attach at o- position with respect to CH3 and m-position with respect to NO2 group.
Step 2: On reduction with Sn/ HCl, NO2 group changes to -NH2 group.
Step 3: On treatment with NaNO2 + HCl; NH2 changes to diazo group, i.e. Q shows diazotisation.
Step 4: On treatment with H3PO2, only diazo group (N2Cl) reacts and gets removed.
Step 5:On oxidation with KMnO4/ OH-, -CH3 group changes to -COOH group.
Which one of the following is an allylic halide?
2-chlorobutane
Chloroethene
3-bromopropene
2-chlorotoluene