Silver nitrate reacts with the sodium chloride present in sweat residues of latent fingerprints to form silver chloride. Upon exposure to ultraviolet light, the silver chloride darkens, making the fingerprint visible. This method is particularly useful on porous surfaces.
Europium (Eu) resembles Calcium (Ca) in the following ways:
(A). Both are diamagnetic
(B). Insolubility of their sulphates and carbonates in water
(C). Solubility of these metals in liquid NH3
(D). Insolubility of their dichlorides in strong HCI
Choose the correct answer from the options given below: