C.Class 7
ACIDS, BASES and SALTS , Class-7
1. ACID - BASE INDICATORS An acid - base indicator is a substance that gives different colours in acidic and basic media. Exa…
1. ACID - BASE INDICATORS An acid - base indicator is a substance that gives different colours in acidic and basic media. Exa…
Motion in a straight line Mechanics It is the branch of physics that deals with the conditions of rest or motion of t…
Electromagnetic Wave Theory[Wave nature of electromagnetic radiations] This theory was put forward by James Clark Maxwell in 18…
1.REFRACTION OF LIGHT The change in direction of light when it passes from one optical medium to another optical medium obli…
Q.No. Questions 1. Solve the following equations: (i) 2y - 3 = 1/2 (ii) 5y/6 + 3/4 = -y + 8 (iii) (3x-5)/4 + …
Thomson's Model of Atom J.J. Thomson, in 1898,proposed that an atom was a sphere of positive electricity in which electr…
Discovery of proton - Study of anode rays Goldstein in 1886, performed discharge tube experiments in which he took perforated…
Structure of atom STRUCTURE OF ATOM TOPICS TO COVER :- The discovery of electron, proton and neutron and their characteris…