Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

How can the organic compounds like alkanes,alkenes,alkynes be prepared in labs ? What will be the temperature required to prepare them ??

How can the organic compounds like alkanes,alkenes,alkynes be prepared in labs ? What will be the temperature required to prepare them ??

Grade:12

1 Answers

SAGAR SINGH - IIT DELHI
879 Points
11 years ago

Dear student,

General Methods of Preparation of Alkanes

(i)   Decarboxylation :

(a)    Decarboxylation means removal of CO2 from molecules having - COOH gp.

(b)    Saturated monocarboxylic acid salt of sodium potassium on dry distillation with soda lime gives alkane.

                                 RCOONa soda-lime  R-H

or                  RCOONa + NaOH cao  R-H + Na2CO3

(c)    The alkane formed always contains one carbon atom less than the original acid.

(d)    The yield is good in case of lower members but poor for higher members.

(e)    Soda lime is prepared by soaking quick lime CaO in caustic soda solution and then drying the products. It is generally written as NaOH + CaO. Its reaction is milder than caustic soda. Otherwise the reaction will occur violently. Also CaO used alongwith NaOH keeps it dry (NaOH is hygroscopic) to aid fusion.

(f)        The decarboxylation of sodium formate yields H2.

                                        HCOONa + NaOH cao H2 + Na2CO3

                                         CH3COONa + NaOH cao CH4 + Na2CO3

                                                                methane

Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.

All the best.

Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.

Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar  respectively : Click here to download the toolbar..

 

Askiitians Expert

Sagar Singh

B.Tech, IIT Delhi

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free