Download App

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

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryAldehydes, Ketones and Carboxylic Acids5 Marks
Question
Discuss aldol condensation in detail.
✓

Answer

self

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "5 Marks Questions" from Aldehydes, Ketones and Carboxylic Acids→Aldehydes, Ketones and Carboxylic Acids — all question types→Chemistry STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Match the compounds/elements given in Column I with uses given in Column II.

 
Column I (Compound/element)
 
Column II (Use)
(i)
Lanthanoid oxide
(a)
Production of iron alloy
(ii)
Lanthanoid
(b)
Television screen
(iii)
Misch metal
(c)
Petroleum cracking
(iv)
Magnesium based alloy is constituent of
(d)
Lanthanoid metal + iron
(v)
Mixed oxides of lanthanoids are employed
(e)
Bullets
 
 
(f)
In X-ray screen

 

→
Expian the basic properties of amines.
→
Which of the following compounds would undergo aldol condensation, which the Cannizzaro reaction and which neither? Write the structures of the expected products of aldol condensation and Cannizzaro reaction.
  1. Methanal
  2. 2-Methylpentanal
  3. Benzaldehyde
  4. Benzophenone
  5. Cyclohexanone
  6. 1-Phenylpropanone
  7. Phenylacetaldehyde
  8. Butan-1-ol
  9. 2,2-Dimethylbutanal.
→
  1. Define the following terms:
  1. Mole fraction.
  2. Ideal solution.
  1. 15.0 g of an unknown molecular material is dissolved in 450 g of water. The resulting solution freezes at - 0.34°C. What is the molar mass of the material?

(Kf for water = 1.86 K kg mol–1).

→
Why the reactivity of chlorobenzene towards nucleophilic substitution increase when electron withdrawing group ( $- NO _2$ ) is attached to the ortho and para positions? Explain.
→
Answer the following question:
How will you convert phenol to benzoic acid?
→
The experimental data for decomposition of N2O5
[2N2O5 → 4NO2 + O2]
in gas phase at 318K are given below:
t/s 0 400 800 1200 1600 2000 2400 2800 3200
102 × [N2O5]/mol L-1 1.63 1.36 1.14 0.93 0.78 0.64 0.53 0.43 0.35
  1. Plot [N2O5] against t.
  2. Find the half-life period for the reaction.
  3. Draw a graph between log[N2O5] and t.
  4. What is the rate law?
  5. Calculate the rate constant.
  6. Calculate the half-life period from k and compare it with (ii).
→
Why is it not possible to obtain pure ethanol by fractional distillation? What general name is given to binary mixtures which show deviation from Raoult’s law and whose components cannot be separated by fractional distillation. How many types of such mixtures are there?
→
Match the catalysts given in Column I with the processes given in Column II.
 
Column I (Catalyst)
 
Column II (Process)
(i)
Ni in the presence of hydrogen
(a)
Zieglar Natta catalyst
(ii)
Cu2Cl2
(b)
Contact process
(iii)
V2O5
(c)
Vegetable oil to ghee
(iv)
Finely divided iron
(d)
Sandmeyer reaction
(v)
TiCl4 + Al (CH3)3
(e)
Haber’s Process
 
 
(f)
Decomposition of KClO3
→
Explain the electrophilic substitution reactions of amine.
→