Which of the following statements regarding sulphur is incorrect? A S2 molecule is paramagnetic B The vapour at 200∘C consists mostly of S8 rings C At 600∘C the gas mostly consists of S2 molecules D The oxidation state of sulphur is never less than +4 in its compounds.

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?