Name the following:

Process by which ethane is obtained from ethane:

Name the following: 

A hydrocarbon which contributes towards the greenhouse effect. 

Name the following: 
The distinctive reaction that takes place when ethanol is treated with acetic acid. 

4.

Name the following:
The property of elements by virtue of which atoms  of the element can link to each other in the form of a long chain or ring structure.

Name the following:
Reaction when an alkyl halide is treated with alcoholic potassium hydroxide. 

i)  Among the element given below, the element with the least electronegativity is:

a)      Lithium

b)      Carbon

c)       Boron

d)      Fluorine

The metals of group 2 from top to bottom are Be,Mg, Ca, Sr and Ba.

1) which one  of these elements will form ions most readily and why?

2) state the common feature in the electronic configuration of all these elements.

Arrange  the following as per the instructions given in the brackets:

I)  Cs, Na, Li,K, Rb (increasing order of metallic character)

ii) Mg, Cl, Na, S, Si (decreasing order of atomic size)

Arrange  the following as per the instructions given in the brackets:

iii) Na,K,Cl,Si(increasing order of ionization energy)