Mention the disadvantage of Pauling and Mulliken scale.

List the disadvantages of using fosil fuels.

(a) Complete the following equations : (i) nCH_(2) = CH_(2) rightarrow……….. (ii) CH_(3)COOH - NaHCO_(3)rightarrow …….+……+……. (b) What is the cause of hardness of water? Why soap does not form lather with hard water? Mention the disadvantage of cleaning clothes with soap in hard water?

Mention the range of time scales.

Mention the range of mass scales.

Mention the advantages of apomixis and polyembryony.

Write down the disadvantages of friction .

Mention the function of RBC.

What are the disadvantages of hybrids?