What is the name of the following reaction?
PhCHO + (CH3CO)2O PhCH = CHCO2H
Oxymercuration demercuration reaction
Cannizzaro reaction
Knoevenagel's reaction
Perkin reaction
Arrange X, Y and Z in order of increasing acidic strengths.
X > Z > Y
Z < X < Y
X > Y > Z
Z > X > Y
Arrange the following monomers in order of decreasing ability to undergo cationic polymerisation.
I. CH2 = CH - C6H4(NO2)
II. CH2 = CH - C6H4(CH3)
III. CH2 = CH - C6H4(OCH3)
I > II > III
II > I > III
III > II > I
I > III > II
Assertion : Oxidation of 1-nitronaphthalene gives o-nitrophthalic acid whereas 1-amino naphthalene on oxidation gives phthalic acid.
Reason : An amino group attached to the benzene ring makes it resistant to oxidation whereas nitro group makes the benzene ring susceptible to oxidation.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : Benzene reacts with iodine monochloride in presence of anhyd. AlCl3 to form iodobenzene.
Reason : Iodine monochloride reacts with anhyd. AlCl3 to produce I+ which attacks the benzene ring.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: Phenol forms 2, 4, 6-tribromophenol on treatment with Br2- water at 273 K.
Reason : Phenol is o, p- directing group.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false
Assertion: Aromatic aldehydes and formaldehyde undergo Cannizzaro reaction.
Reason : Aromatic aldehydes are almost as reactive as formaldehyde.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : Activity of an enzyme is pH-dependent.
Reason : Change in pH affects the solubility of the enzyme in water.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
B.
If both assertion and reason are true but reason is not the correct explanation of assertion.
Activity of enzyme is maximum at pH = 7.4 (physiological pH). In fact, as pH is increased, the rate rises to a maximum and then falls off.
Assertion : Nucleotides are phosphate esters ofnucleosides.
Reason : The various nucleotides in nucleic acids are linked either through purine or pyrimidine bases.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Sulpha drugs contain sulphonamide group.
Reason : Salvarsan is a sulpha drug
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false