Question : What are the characteristics of isotopes?

Option 1: Same neutron and same proton

Option 2: Same atomic number and different mass number

Option 3: Same atomic number and same mass number

Option 4: Same neutron and different proton

Question : What is the relative charge of a proton and neutron?

Option 1: -1 and +1 respectively

Option 2: +1 and -1 respectively

Option 3: +1 and 0 respectively

Option 4: -1 and 0 respectively

Question : An atom is _________.

Option 1: the smallest particle of matter known

Option 2: the smallest particle of gas

Option 3: the smallest indivisible particle of an element that can take part in a chemical change

Option 4: charged particle

Question : The reaction between an acid and a base is known as _________.

Option 1: condensation reaction

Option 2: substitution reaction

Option 3: oxidation reaction

Option 4: neutralisation reaction

Question : The working of a dry cell is based on

Option 1: Decomposition reaction

Option 2: Spontaneous oxidation-reduction reaction

Option 3: Combination reaction

Option 4: Electrolysis