Question
With the help of an example, explain the process of hydrogenation. Mention the essential conditions for the reaction and state the change in physical property with the formation of the product.

Answer

Hydrogenation is a process to obtain saturated hydrocarbons from unsaturated hydrocarbons.
See a common example: The unsaturated hydrocarbon ethene is reduced to ethane. The conditions require pressure (different for different reactions) and catalyst such as Ni, Pd, and Pt .....
The Physical properties might change as follows:
  1. Unsaturated hydrocarbons are mainly insoluble in water but saturated are soluble. Therefore the insoluble becomes soluble.
  2. The boiling point and freezing point changes as accordance to the compounds.

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

Similar questions

The electronic configurations of three elements A, B and C are as follows:
A 2, 8, 1
B 2, 8, 7
C 2, 4
  1. Which of these elements is a metal?
  2. Which of these elements are non-metals?
  3. Which two elements will combine to form an ionic bond?
  4. Which two elements will combine to form a covalent bond?
  5. Which element will form an anion of valency 1?
What are the advantages and disadvantages of using a solar cooker?
With the help of suitable examples, explain why certain traits cannot be passed on to the next generation. What are such traits called?
Draw a ray diagram showing the path of rays of light when it enters with oblique incidence:
  1. From air into water;
  2. From water into air.
How are water and minerals transported in plants?
A forest ecosystem having a lot of green plants has some foxes, lions and rabbits in it.
  1. Write a food chain comprising all the four organisms mentioned above.
  2. Name (i) one herbivore, and (ii) two carnivores, in this food chain.
  3. Name the link which is a predator as well as a prey.
  4. Name (i) second trophic level, and (ii) third trophic level.
  5. Which link of this food chain can feed on second trophic level as well as third trophic level, independently?
  6. If the sun provides 1000 J of energy to the plants, then how much energy will be transferred to fox through the food chain.
What is, highest, and lowest, resistance which can be obtained by combining Com resistors having the following resistances?$4 Ω, 8 Ω, 12 Ω, 24 Ω$
In what respects do the properties of group 1 elements differ from those of group 17 elements? Explain with examples by taking one element from each group.
Explain budding in hydra with the help of labelled diagrams only.
How is zinc extracted from its carbonate ore (calamine)? Explain with equations.