Dalton’s Atomic Theory successfully explained the Law of ______.

i) Conservation of Mass

ii) Definite Proportions

iii) Radioactivity

iv) Multiple Proportions

a) (i), (ii) and (iii) b) (i), (iii) and (iv) c) (i) ,(ii) and (iv)

In water, hydrogen and oxygen are combined in the ratio of ____by mass.

a) 1:8 b) 8:1 c) 2:3

Which one of the following is a wrong statement, regarding the postulates of Dalton’s Atomic Theory?

a) The matter is made up of small indivisible particles called atoms.

b) Atoms of the same element are different in all respects.

c) Atoms of different elements are different in all respects.

Based on the Thomson’s model of an atom, say which of the following statements are correct.

i) The positive charge is assumed to be uniformly distributed over the atom.

ii) The electrons are uniformly distributed in the positively charged sphere.

iii) The electrons attract each other to stabilize the atom.

iv) The mass of the atom is assumed to be uniformly distributed over the atom.

a) (i) ,(ii) and (iv) b) (i),(ii) and (iii) c) (i) and (iii)

Fill in the blanks:

1. ______is a negatively charged particle. (Electron/Proton)

2. Proton is deflected towards the___ charged plate. (positively, negatively)