It is difficult to run fast on sand.

It is difficult to write legible on a newspaper because of

It is difficult to break C-Cl bond in CH_2=CH-Cl due to ________

While experimentation, why do you think it is difficult to assign any effect seen to any single hormone?

Which of the following laws of thermodynamics leads to the interference that it is difficult to convert whole of heat into work?

What make it difficult to separate two glass sheets having a drop of water between them .

Both light and sound waves produce diffraction . It is more difficult to observe the diffraction with light waves because

Why is difficult to hold one's breath beyond a limit?

Give reason, why (i)Cooking is difficult at high altitude.

Why cooking is difficult at high altitude?