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Among the following sets of reactants which one produces anisole?
Which one is formed when sodium phenoxide is heated with ethyl iodide?
Identity Z in the sequence of reactions,
CH3CH2CH=CH2 YZ
(a) CH3CH2CH=CH2
CH3CH2CH2CH2BrBromo-butane (1 product)
CH3CH2CH2CH2BrCH3CH2CH2CH2OC2H5 (williamson's synthesis)
Reaction of ethyl formate with excess of CH3MgI followed by hydrolysis gives
Ethyl formate on reaction with excess of CH3MgI, followed by hydrolysis gives a secondary alcohol i.e. isopropyl alcohol.
Lucas reagent is
(a) The equimolar mixture of concentrated hydrochloric acid and anhydrous ZnCl2 is called Lucas reagent. Lucas reagent is used to distinguish between 1, 2 and 3 alcohols.
The compound which reacts fastest with Lucas reagent is (at room temperature)
(d) In Lucas test when Lucas reagent is treated with 1 ,2 and 3 alcohols, then turbidity appears, if turbidity is appeared immediately, then alcohol is tertiary. 2-methyl propan-2-ol is a tertiary alcohol. Hence, it reacts fastest with Lucas reagent.
The ionisation constant of phenol is higher than that of ethanol because
The general molecular formula, which represents the homologous series of alkanols is
(d) Alkanols are the derivates of alkanes which are derived by the replacement of -H of alkanes with -Oh (hydroxyl groups).
CnH2n+2 →+OH-HCnH2n+1OH or CnH2n+2O
Alkanes
. This reduction cannot be done by:
weaker R.A
What mass of isobutylene is obtained from 37 g of tertiary butyl alcohol by heating with 20% H2SO4 at 363 K, if the yield is 65%?
% yield =65
Real yield = (56/74)x37x(65/100)=18.2 g
How many isomers of C5H11OH will be primary alcohols?
This primary alcohols isomers of C5H11OH are
(i)
(ii)
(iii)
(iv)
Phenol is less soluble in water. It is due to:
Non-polar part C6H5- shows more hydrophobic nature.
The decreasing order of boiling points of ,, alcohol is:
Branching give rise to decrease in surface area and thus intermolecular forces are lowered.
The boiling points of thio-ethers are .... than those of ether.
(c) Molar mass of thioethers are more than ether.
Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine?