Biomolecules — Chemistry STD 12 Science — Question

Write reaction equations that occur at anode and cathode in a dry cell.

Give following conversion in two steps: Benzyl chloride into Benzyl bromide.

Benzaldehyde can be obtained from benzal chloride. Write reactions for obtaining benzalchloride and then benzaldehyde from it.

18g of glucose, C₆H₁₂O₆ (Molar Mass=180g mol^-1) is dissolved in 1kg of water in a sauce pan. At what temperature will this solution boil?
(K_b  for water = 0.52 K kg mol^-1, boiling point of pure water = 373.15 K).

Describe the physical properties of benzenediazonium salts.

Some halogen containing compounds are useful in daily life. Some compounds of this class are responsible for exposure of flora and fauna to more and more of UV light which causes destruction to a great extent. Name the class of these halocompounds. In your opinion, what should be done to minimise harmful effects of these compounds.

Explain reduction reaction of carboxylic acids.

Arrange the following in decreasing order of their acidic strength. Give explanation for the arrangement.
C₆H₅COOH, FCH₂COOH, NO₂CH₂COOH

How will you bring about the following conversion?
Ethane to bromoethene.