Question

Elo!❤

No Spamming!

(a) What is the special feature of the structure of Ethene & Ethyne?

(b) What type of reaction is common to both these compounds? Why methane does not undergo this type of reaction?

Answer 1

(A) The special features of structure of Ethene and Ethyne are as follows :-

ETHENE :-

1) The carbon - carbon bond length of ethene is 133pm that is C-C =133 pm

2)The Carbon-Hydrogen bond length of ethene is 108 pm that is C-H =108 pm

3)The bond angle of ETHENE is 121.7 degrees that is H-C-C =121.7°

4) Ethene possess a double bond. The two carbon atoms in ethene are connected with each other with a double bond.

5) The geometry of Ethene is planar and it possess sp² hybridization. Also it has only 1 pi bond.

6)The structure of Ethene has 2 carbon atoms and 4 Hydrogen atoms.

ETHYNE :-

1)The carbon - carbon bond length of ethyne is 120 pm that is C-C 120 pm

2) The Carbon-Hydrogen bond length of ethyne is 106 pm that is C-H 106 pm.

3)The bond angle of ethyne is 180 degrees that is H-C-C 180°.

4)The geometry of Ethyne is Linear

5) Ethyne possess sp hybridization and has 2 pi bonds.

6) The structure of ethyne consists of 2 Carbon atoms linked with a triple bond and 2 hydrogen atoms.

(B) The reaction which is common to both of these compounds is :-

$addition \: reaction$

Reason :-

Both Ethene and Ethyne are unsaturated hydrocarbons.
The unsaturated hydrocarbons undergo a reaction when hydrogen is added to them in the presence of catalysts like nickel or palladium and get converted into saturated hydrocarbons . This is called is Addition Reaction.

Since, Ethene and Ethyne are unsaturated hydrocarbons, they undergo Addition reaction.
Refer to the attachment number 3

Now,

Methane is already a saturated hydrocarbon. So, it doesn't undergo addition reaction.
Only possibility of Methane is that it can be used in Substitution Reaction.

Thanks!

Answer 2

Answer:

pls thank me and mark me as brainliest