Production of iron in blast furnace follows the following equation

Fe₃O₄(s) + 4CO(g) $$\to$$ 3Fe(l) + 4CO₂(g)

when 4.640 kg of Fe₃O₄ and 2.520 kg of CO are allowed to react then the amount of iron (in g) produced is :

[Given : Molar Atomic mass (g mol^$$-$$1) : Fe = 56, Molar Atomic mass (g mol^$$-$$1) : O = 16, Molar Atomic mass (g mol^$$-$$1) : C = 12]

Which of the following statements are correct?

(A) The electronic configuration of Cr is [Ar] 3d⁵ 4s¹.

(B) The magnetic quantum number may have a negative value.

(C) In the ground state of an atom, the orbitals are filled in order of their increasing energies.

(D) The total number of nodes are given by n $$-$$ 2.

Choose the most appropriate answer from the options given below :

The solubility of AgCl will be maximum in which of the following?

The electronic configuration of Pt (atomic number 78) is :