A milkman adds a very small amount of baking soda to fresh milk. (a) Why does he shift the pH of fresh milk from 6 to slightly alkaline? (b) What do you expect to observe when the milk comes to boil? (c) Why does this milk take a long time to set as curd?

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?