Month: August 2015

  • Physics 9th | Motion: Displacement

    Motion: Displacement Motion 1. A body is said to be in motion if it changes its position with time with respect to the observer. e.g. When a tree T is observed by an observer A sitting on a bench, the tree is at rest. This is because the position of the tree is not changing…

  • Chemistry X | Acid, Bases and Salts: NCERT Solved Questions

    Acid, Bases and Salts: NCERT Solved Questions Question 1. You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution respectively. If you are given only red litmus paper, how will you identify the contents of each test tube ?…