Fill in the blanks by selecting the option with the correct words. The process of removing impurities from impure metal to obtain pure metal is known as of_____ metal. The most widely used method for refining is _____. In this method, the impure metal is taken as _____and the pure metal is taken as ______.

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?