Which of the following is an example of meta directing group?

What is the intermediate conformation between eclipsed and staggered?

Alkynes are ______ in nature and first four members are ______ gases.

Ethene is prepared from chloroethane this is an example of a reaction ______

Is of hydrogenation is ______ on steric crowding.

Ethyne on oxidation with alcoholic KMnO4 forms ____________

In the combustion reaction of alkanes if Ethane is used how many moles of oxygen are required?

Methane cannot be prepared by the reduction of alkenes or alkynes.