MEDIUM
12th ICSE
IMPORTANT
Earn 100

The compound which gives a positive haloform test and a positive Fehling solution test is
(a)acetone
(b)acetaldehyde
(c)formaldehyde
(d)diethyl ether

60% studentsanswered this correctly

Important Questions on Aldehydes, Ketones and Carboxylic Acids
HARD
12th ICSE
IMPORTANT
Benzaldehyde when heated with an alcoholic solution of potassium cyanide, forms

HARD
12th ICSE
IMPORTANT
Addition of water to alkynes occurs in acidic medium and in the presence of ions as a catalyst. Which of the following products will be formed on addition of water to but-1-yne under these conditions?

HARD
12th ICSE
IMPORTANT
Which of the following compounds is most reactive towards nucleophilic addition reactions?

MEDIUM
12th ICSE
IMPORTANT
Match the examples given in Column I with the names of the reaction in Column II and choose the correct option using the codes given below:

MEDIUM
12th ICSE
IMPORTANT
Why there is a large difference in the boiling points of butanal and butan-1-ol?

HARD
12th ICSE
IMPORTANT
Dipole moment of (propanal) is greater than that of but-1-ene . Why?

HARD
12th ICSE
IMPORTANT
Oxidation of ketones involve carbon-carbon bond cleavage. Name the products formed on the oxidation of 2,5-dimethyl hexan-3-one.

HARD
12th ICSE
IMPORTANT
Name any two reagents which are used to distinguish between aldehydes and ketones.
