CBSE
Assertion : p-N,N-dimethylaminobenzaldehyde undergoes benzoin condensation.
Reason : The aldehydic (-CHO) group is meta directing.
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
CH3CHI2 ?
Here the end product would be :
2 - cyano propionic acid
ethane - l , 1 - dicarboxylic acid
2 - methyl ethanoic acid
propionic acid
Which of the following compounds will react with NaHCO3 solution to give sodium salt and carbon dioxide ?
Acetic acid
n - hexanol
Phenol
Both (b) and (c)
If the enolate ion combines with carbonyl group of ester , we get :
aldol
, - unsaturated ester
- keto aldehyde
acid
The reaction , ROH + H2CN2 in the presence of HBF4 , gives the following product :
ROCH3
RCH2OH
ROHCN2N2
RCH2CH3
Oxidation product of 1,2-cyclopentanediol with HIO4 gives
OHC-(CH2)3-CHO
COOH-CH-CH2-CH2-COOH
None of these
Assertion : (CH3)3CCOC(CH3)3 and acetone can be distinguished by the reaction with NaHSO3.
Reason : HSO3- is the nucleophile in bisulphite addition.
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.
Identify the product Y in the sequence :
CH3CHO + CH3MgI X Y , is
CH3OH
CH3CH2OH
(CH3)2CHOH
(CH3)3COH
Which will give chiral molecule ?
CH3COCl
C2H5CHO
(CH3)2CHC2H5
CH3-CH=C(CH3)2
Two moles of acetic acid are heated with P2O5 .The product formed is :
2 moles of ethyl alcohol
formic anhydride
acetic anhydride
2 moles of methyl cyanide