The brown ring test for nitrates depends on :
the reduction of nitrate to nitric oxide
oxidation of nitric oxide to nitrogen dioxide
reduction of ferrous sulphate to iron
oxidising action of sulphuric acid
An organic compound which produces a bluish green coloured flame on heating in presence of copper is :
chlorobenzene
benzaldehyde
aniline
benzoic acid
For a reaction A+ B → C + D if the concentration of A is doubled without alterning the concentration of B, the rate gets doubled. If the concentration of B is increased by nine times without alterning the concentration of A, the rate gets tripled. The order of the reaction is :
2
1
3/2
4/3
The catalyst used in the preparation of an alkyl chloride by the action of dry HCl on an alcohol is:
anhydrous AlCl3
FeCl3
anyhydrous ZnCl2
Cu
Which of the following compound would not evolve CO2 when treated with NaHCO3 solution?
Salicylic acid
Phenol
Benzoic acid
4-nitrobenzoic acid
Identify the product Y in the following reaction sequence:
pentane
cyclobutane
cyclopentane
cyclopentanone
C.
cyclopentane
The reaction C2H5ONa + C2H5I → C2H5OC2H5 + NaI is known as:
Kolbe's synthesis
Wurtz's synthesis
Williamson's synthesis
Grignard's synthesis
The basicity of aniline is less than that of cyclohexylamine. This is due to :
+R-effect of-NH2 group
-I effect of -NH2 group
-R effect of-NH2 group
hyperconjugation effect
Which of the following compound is expected to be optically active?
(CH3)2CHCHO
CH3CH2CH2CHO
CH3CH2CHBrCHO
CH3CH2CBr2CHO