How many of the following statement(s) correct? (i) Pairing of electrons in degenerate orbitals decreases the energy of the system. (ii) 2 P x and 3 P x orbitals are called degenerate orbitals (ii

Question

How many of the following statement(s) correct?

(i) Pairing of electrons in degenerate orbitals decreases the energy of the system.

(ii) $2 P_{x}$ and $3 P_{x}$ orbitals are called degenerate orbitals

(iii) $Cu^{+}$ is repelled by magnetic field

(iv) In writing the electronic configuration of an atom the 5d orbital will be filled before 6s orbital

(v) Maximum value of $(n + ℓ)$ for chlorine in its first excited state is 4

(vi) $Mn^{+ 4}$ and $Co^{+ 2}$ having same magnetic moment value.

(vii) Always all metallic oxide are basic in nature.

TestHub · Accepted Answer

Statement (iii) and (vi) are correct.

(i) Pairing increases energy due to electron-electron repulsion.

(ii) $2 p_{x}$ and $3 p_{x}$ are not degenerate; they have different principal quantum numbers.

(iv) 6s is filled before 5d according to the Aufbau principle.

(v) For Cl (first excited state), the maximum $(n + l)$ is 5 (e.g., $3 s^{2} 3 p^{4} 4 s^{1}$ ).

(vii) Some metallic oxides (e.g., Al₂O₃, ZnO) are amphoteric.

Chemistry - GENERAL CHEMISTRY Question with Solution | TestHub