Question

1. ln these questions (Q. No i - iv, a statement of assertion followed by a statement of
reason is given. Choose the correct answer out of the following choices.
a) Assertion and reason both are corred statements and reason is correct explanation
for assertion
b) Assertion and reason both are correct statements but reason is not correct
explanation for assertion.
Assertion is correct statement but reason is wrong statement,
d) Assertion is wrong statement but reason is correct statement.
1
0 Assertion: 4p orbital will be occupied by an electron before 5s orbital
Reason: (n+1) value is higher for 4p than 5s
(a) Assertion: 3s orbital can be described by n=3,1 = 0 and m=0
Reason: No two electrons can have same 4 quantum numbers
(ii) Assertion: If 3d has 5 electrons all the 5 will have either + oras s value
Reason: Electrons in singly occupied degenerate orbitals will have minimum repulsion
when they have parallel spins
(iv) Assertion: Electrons will enter 4s subshell after the 3p subshell gets filled with 3
electrons
Reason: Lower energy orbitals are filled first​

Answer 1

Answer:

ln these questions (Q. No i - iv, a statement of assertion followed by a statement of

reason is given. Choose the correct answer out of the following choices.

a) Assertion and reason both are corred statements and reason is correct explanation

for assertion

b) Assertion and reason both are correct statements but reason is not correct

explanation for assertion.

Assertion is correct statement but reason is wrong statement,

d) Assertion is wrong statement but reason is correct statement.

1

0 Assertion: 4p orbital will be occupied by an electron before 5s orbital

Reason: (n+1) value is higher for 4p than 5s

(a) Assertion: 3s orbital can be described by n=3,1 = 0 and m=0

Reason: No two electrons can have same 4 quantum numbers

(ii) Assertion: If 3d has 5 electrons all the 5 will have either + oras s value

Reason: Electrons in singly occupied degenerate orbitals will have minimum repulsion

when they have parallel spins

(iv) Assertion: Electrons will enter 4s subshell after the 3p subshell gets filled with 3

electrons

Reason: Lower energy orbitals are filled first