Aldehydes, Ketones and Carboxylic Acids — Chemistry STD 12 Science — Question

1. pK_b value for aniline is more than that for methylamine.
2. Ethylamine is soluble in water whereas aniline is not soluble in water.
3. Primary amines have higher boiling points than tertiary amines.

1. Co³⁺ ion is bound to one Cl^–, one NH₃ molecule and two bidentate ethylenediamine (en) molecules.
2. Ni²⁺ ion is bound to two water molecules and two oxalate ions.

(At. nos. Co = 27, Ni = 28).

1. Electrophilic substitution in case of aromatic amines takes place more readily than benzene.
2. CH₃CONH₂ is a weaker base than CH₃CH₂NH_2.
3. Nitro compounds have higher boiling points than hydrocarbons having almost same molecular mass.

1. Deficiency of which vitamin causes night-blindness?
2. Name the base that is found in nucleotide of RNA only.
3. Glucose on reaction with HI gives n-hexane. What does it suggest about the structure of glucose?

1. Describe the following giving suitable examples:

1. Cannizzaro reaction.
2. Aldol condensation.

2. ​​​​​​​Give a chemical test to distinguish between ethanal and propanal.