1. ASSERTION AND REASONING QUESTIONS: In the following questions, a statement of assertion (A) is followed by a statement of reason (R).

Mark the correct choice as:

(a) Both assertion (A) and reason (R) are true, and reason (R) is the correct explanation of

assertion (A).

(b) Both assertion (A) and reason (R) are true, but reason (R) is not the correct explanation of

assertion (A).

(c) Assertion (A) is true, but reason (R) is false. (d) Assertion (A) is false, but reason (R) is true

1) Assertion: Atom is electrically neutral.

Reason: A neutral particle, neutron is present in the nucleus of atom.

2) Assertion: Maximum number of electrons that can be accommodated in L-shell is 8 Reason: The formula to find maximum number of electrons in a shell is 2n2.

3) Assertion: For noble gases, valency is zero.

Reason: Noble gases have 8 valence electrons

4)Assertion: The Nitrogen atom loses its 3 valence electrons to form its ion Reason: Nitrogen ion is an anion

II CHOOSE THE CORRECT ANSWER:

1.An atom has 4 electrons and 4 protons and 4 neutrons. The atom is electrically neutral.

Which difference in the properties of protons and electrons affects the electrical neutrality (c) Electrons and protons have opposite charges of the same magnitude

of the atom?

(a)Electrons are 2000 times lighter than protons.

(b) Electrons and protons have the same charge and mass.

(d) Electrons are present in the outer side of the atom compared to the protons..​