Which of the following expression is correct for the first order reactions (C0 refers to initial concentration and t1/2 refers to half-life time)?
Which of the following reacts with phenol to give salicylaldehyde after hydrolysis?
Dichloro methane
Trichloro methane
Methyl chloride
None of these
B.
Trichloro methane
Phenol reacts with chloroform (trichloromethane) in presence of aqueous sodium or potassium hydroxide at 340 K followed by hydrolysis of the resulting product and gives salicyladehyde. This reaction is called Reimer-Tiemann reaction.
Note : In this reaction dichlorocarbene intermediate is formed.
Which of the following is most soluble in water?
Normal butyl alcohol
Iso-butyl alcohol
Tertiary butyl alcoho
None of the above
Ethyl alcohol exhibits acidic character on reacting with
acetic acid
sodium metal
hydrogen iodide
acidic potassium dichromate
The reaction CH3CH2ONa + BrCH2CH3 CH3CH2OCH2CH3 is called
Frankland reaction
Wurtz reaction
Williamson's synthesis
Cannizaro's reaction
Diethyl ether on heating with conc. HI gives two moles of
ethyl iodide
ethanol
Iodoform
methyl iodide
Schiff's reagent is
p-rosaniline hydrochloride solution decolourised with sulphurous acid
magenta solution decolourised with Cl2
ammoniacal silver nitrate solution
alkaline KMnO4 solution