Vapour pressure of pure water at 298K is 23.8mm Hg.50g of urea NH2CONH2 is dissolved in 850g of water. Calculate the vapour pressure of water for this solution and its relative lowering.

What type of questions asked from the lesson of magnetic effect of electric current 

Wavelength of green light is

A) 400-450 nm

B) 500-550 nm

C) 660-720 nm

D) 720-800 nm

What is the difference between anaerobic & aerobic respiration? Name some organism that uses the aerobic mode of respiration?

What are the main components of our environment? Explain each of them briefly.

What are examples of hydrotropism plants?