Why superoxide of alkali metal are paramagnetic , explain with the help of molecular orbital diagram. b.) 1gm of Mg is burnt in a closed container which contains 0.6gm of oxygen. Which reactant is left in excess and calculate the excess reactant mass?
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25Arteries and veins are connected by a network of extremely narrow tubes called :
(1 Point)
Sieve tubes
Capillaries
Vena cava
Valve
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