Aqua regia is a mixture of: (a). Three parts of concentrated nitric acid and one part of concentrated hydrochloric acid (b). Three parts of concentrated hydrochloric acid and one part of concentrated nitric acid (c). Three parts of diluted hydrochloric acid and one part of diluted nitric acid (d). Three parts of diluted nitric acid and one part of diluted hydrochloric acid

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?