Question

Sr i Chaitanya Schools
Session - 4 X - Chemistry
SECTION - I
Answer all the following questions. 6 × ½ = 3M
1. Which rule is violated in the elctronic configuration of 1s0 2s2 2p4
2. Which of the element pocesses fully filled degenerate orbital configuration (Na, Ca, B, Ne, Cl).
3. Asser tion : Electron enters into 4s orbital after filling 3p. But not 3d.
Reason : (n + l) rule of 4s is less than (n + l) value of 3d.
4. Match the following.
Column - I Column - I I
1) Sodium P) 1s2 2s2 2p6 3s2
2) Neon Q) 1s2 2s2 2p6 3s1
R) 1s2 2s2 2p6 3s2 3p6
S) 1s2 2s2 2p6
5. Choose the wrong statement from the following.
i) Aufbau principle is violated in 1s2, 2s0, 2p6, 3s2 configuration.
ii) Aufbau principle is obeyed in 1s2, 2s2, 2p6, 3s2, 3p6 configuration.
iii) Aufbau principle does not follow increasing order of (n + l) value.
6. What are the orbitals have same (n + l) value, 3p, 3s, 4p and 4s.
SECTION - I I
Answer all the following questions. 3 × 1 = 3M
7. Which rule is violated when

Answer 1

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