Complete the following reaction:

What is Lindlar's catalyst? What for is it used?

Ozonolysis of the alkene [X] followed by decomposition of the ozonide with water and a reducing agent gave a mixture of acetone and formaldehyde. Write down the structure of alkene[X].

24.

Which compound on polymerisation gives Teflon?

Give the structure of alkene (C₄H₈) which adds on the HBr in the absence or presence of peroxide to give the same product, C₄H₉Br.

What is teflon? What for is it used?

How will you detect the presence of unsaturation in an organic compound?

What is cis-trans isomerism?

Which one of the following do not exhibit geometrical isomerism?
(i) Pentene-1         (ii) Butene-2
(iii) Isobutylene     (iv) 3, 4-Dimethyl- 3-hexene.

What happens when water is dropped over calcium carbide?