In halogens, the electronegativity decreases down the group due to increase in atomic radius and decrease in tendency to gain electron.

The food prepared in the plant (which are called autotrophs) by the process of photosynthesis is glucose that gets stored in various plant parts in the form of starch.

(1)Valve prevent backside flow of the blood. (2)You must know that valves ensure that blood does not flow backwards when the atria or ventricles contract. (3)Similarly, atrioventricular (AV) valve between atrium and ventricle directs the flow of blood and prevents ...