Which of the following are not characteristics of chemisorption? (A) Adsorption is specific. (B) Heat of adsorption is of die order of 200 KJ mol−1 (C) Adsorption is irreversible. (D) Adsorption may form multimolecular layers.

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?