Why UK Citizens Can't Donate Blood in US? - By Kishor Singh #shorts

Why is tin electroplated on iron to make cans used for storing food?

Which blood group can donate the blood to all other persons ?

(a) Explain how the separation of oxygenated and deoxygenated blood is useful in humans ? (b) Why is double circulation of blood necessary in humans ?

Why transistor can not be used as rectifier?

Which one of the following Articles of the Constitution of India lays down that no citizen can be denied the use of wells, tanks and bathing Ghats maintained out of State funds?

Why can you not use a concave mirror as a rear-view mirror in vehicles ?

Given below are four statements (i-iv) regarding human blood circulatory system (i) Arteries are thick-walled and have narrow lumen as compared to veins (ii) Angina is acute chest pain when the blood circulation to the brain is reduced (iii) Persons with blood group AB can donate blood to any person with any blood group under ABO system (iv) Calcium ions play a very important role in blood clotting Which two of the above statements are correct ?