Iron is a transition element. Iron combines with chlorine to form the compounds FeCl_2 and FeCl_3. (Hint : Oxidation state of chlorine Cl = -1 , Atomic number of Fe = 26) a) Write down the oxidation states of Fe in FeCl_2 and FeCl_3. b) Write the subshell electronic configuration of both of the irons in FeCl_2 and FeCl_3. c) Give reasons for the different oxidation states of Fe.

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?