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

Methyl bromide is converted into ethane by heating it in ether medium with :

• Al

• Zn

• Na

• Cu

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

46.

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

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