Fill in the following blanks: (a) Common salt is obtained from sea-water by the process of ........... (b) Rock salt is mined just like...................... (c) Chemical formula of washing soda is.................. (d) Sodium hydrogen carbonate is .................. soda whereas sodium carbonate is................. Soda. (e) The chemical formula of plaster of Paris is............

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?