Select the incorrect statements (I) Almost alll metals combine with oxygen to form metal oxides. II. All metal oxides are soluble in water. III. All metal oxides are basic in nature. IV. Some metal oxides dissolve in water to form alkalis.

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?