Advertisements
Advertisements
प्रश्न
What is the action of following reagents on pent-3-enal?
- H2/Ni
- LiAlH4/H3O+
उत्तर
Pent-3-enal contains an isolated > C = C < and an aldehyde group. H2/Ni can reduce both these functional groups while LiAlH4 can reduce only –CHO of the two.
- H2/Ni:
\[\ce{\underset{\text{Pent-3-enal}}{CH3 - CH = CH - CH2 - CHO} ->[H2/Ni]\underset{\text{Pentan-1-ol}}{CH3 - CH2 - CH2 - CH2 - CH2 - OH}}\] - LiAlH4/H3O+:
\[\ce{\underset{\text{Pent-3-enal}}{CH3 - CH = CH - CH2 - CHO} ->[(i)LiAIH4][(ii)H3O+] \underset{\text{Pent-3-en-1-ol}}{CH3 - CH = CH - CH2 - CH2 - OH}}\]
संबंधित प्रश्न
Answer in one sentence/ word.
Write the IUPAC name of alcohol having molecular formula C4H10O which is resistant towards oxidation.
Write two points of difference between the properties of phenol and ethyl alcohol.
Answer in brief.
Give the equations of the reactions for the preparation of phenol from isopropyl benezene.
When vapours of tert.butyl alcohol are passed over hot copper, it gives _____________
Write Kolbe’s reaction.
Write chemical equation of acetyl chloride with phenol
How will you bring about the following conversions?
isopropyl alcohol to acetone
How will you bring about the following conversions?
acetone to 2-methylpropan-2-ol
An organic compound gives hydrogen on reaction with sodium metal. It forms an aldehyde with molecular formula C2H4O on oxidation with pyridinium chlorochromate. Give the chemical equations in support of these observations.
____________ is used for silvering mirrors.
In phenols, −OH group is attached to ___________ hybridised carbon.
α-butylene when subjected to hydroboration oxidation reaction, yields ______.
Propane when treated with cold cone. H2SO4 forms a compound which on heating with water gives ______.
The number of isomeric alcohols possible with the formula C4H10O is ____________.
+I effect of alkyl groups in alcohols increases the stability of ____________.
Sodium benzene sulphonate reacts with NaOH and then on acidic hydrolysis, it gives __________.
In Raschig's method for synthesis of phenol, the reactants used are ____________.
\[\ce{Isopropyl alcohol + acidic K2Cr2O7 -> X}\]
Identify product 'X' in the above reactions.
The number of moles of hydrogen gas formed when 2 moles of 2-methylpropan-2-ol reacts with aluminium is ____________.
What is INCORRECT about the product written in the below given reaction?
\[\ce{R - CH2 - OH ->[PCC] R - COOH}\]
Identify the product B in following conversion.
\[\ce{Chlorobenzene + H2O ->[Cu, 673 K][Pressure] A ->[conc. H2SO4][373 K] B}\]
Which isomer of C4H10O is optically active?
Which among the following compounds is used to prepare solid fuel using calcium acetate?
Which of the following alcohols is least soluble in water?
Which of the following compounds does NOT react with sodium metal?
Which of the following on oxidation yields ethyl methyl ketone?
A reaction of phenol with chloroform in presence of sodium hydroxide to form salicylaldehyde is known as ____________.
Identify the compound having highest boiling point from the following?
Which among the following phenolic compound is most acidic in nature?
Write the chemical reaction when hot copper is treated with Vapours of 2° (secondary) alcohol.
