A gas occupies 700 ml at a pressure of 700 mm Hg and a temperature of 57^(@)C. If at s.t.p. the mass of the gas is 1.5g find the vapour density and the molecular weight of the gas. (Given 1 litr of hydrogen weighs 0.09 g at s.t.p.)

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?