immense notes

Exercise 6(A) $l1. Justify the position of Hydrogen in the periodic table. Ans. Position of hydrogen in the periodic table Hydrogen has atomic number 1 It has one electron in its atom Is electronic configuration is 1 (K-shell) It has one electron in its valence shell. Hydrogen resembles with group I as well as group 17 elements. Also in certain properties hydrogen difFers from group and group 17 elements. But on account of its electronic configuration, it is generally placed with group I elements at their top 2. Why does hydrogen show dual nature ? Ans, Hydrogen show dual nature i.s. it resembles with group I as well as group 17 elements. This is because hydrogen atom can lose or gain one electron 3. Compare hydrogen with alkali metals on the basis of : (1) Ion formation (iii) Reaction with oxygen (it) Reducing power (iv) Oxide formation Ans. Comparison of hydrogen with alkali metals : (i) On the basis of ion formation: Both hydrogen and alkali me of the one v...

The really important sources :- The Great Bath One of the largest public building It is important  source of art and architecture of the time. To prove the above point we can see how water tight is the great bathtThe floor of the tank is water tight due to finely fitted bricks laid on edge with gypsum plaster and the side walls were constructed in a similar manner. To make the tank even more water tight, a thick layer of bitumen (natural tar) was laid along the sides of the tank and presumably also beneath the floor. The construction of the great bath indicate the  art of building had reached a high degree of perfection. This also points out that there must be a ruling class to build such a massive structure.                                                                   Citadel The Citadel is...