VSA
Ques. 1 Find the ratio by mass of the elements present in molecule of ammonia (NH3).Given that, atomic mass N=14, H=1
Que. 2 Write the electronic configuration of an element whose atomic number is 12.
Que. 3 A student picks up four books from the floor, walks across the room through some distance with the books at the same height and then keeps these books at the new place. In which of these sequence of actions work is said to be performed ?
Que. 4 A body is fully immersed in water to a depth of 2m, 4m and then 5 m, in turn. Will the loss in its weight be equal or different in three cases? If different, in which case will it be least ?
