How many 3d electrons does a Mn^2+ ion have? Which of these aqueous solutions ha

Question

How many 3d electrons does a Mn^2+ ion have? Which of these aqueous solutions has the highest pH? r A) 0.100 MN_aOH m 0.100 M Na;0 all of these solutions have the same pH due to the level to decide these all are solutions of weak bases, so values are needed .n order In which of the following compounds is sulfur in a positive oxidation state H:S S_8 CaS MnS SO_3 Chlorine gas is prepared commercially by electrolysis of carbon tetrachloride. oxidation of chloride ion with F:(g).electrolysis of NaCI(aq). oxidation of chloride ion with Br:(aq). electrolysis of AlCh(aq). Choose the formula that does not represent a stable allot rope. Phosphoric acid is the most important of the phosphorus ox acids. Industrially, phosphoric acid is prepared by A) the Oswald process. the Haber process. the reaction of phosphate rock with sulfuric acid. the reaction of P_4O_10 with water. the Frisch process.

Explanation / Answer

46)

Electronic configuration of Mn is [Ar] 3d5 4s2

In Mn2+ , 2 electrons from 4s orbital is removed

So,

number of electronds in 3d orbital is 5

Answer: E

47)

The electronic configuration of Cr is 1s2 2s2 2p6 3s2 3p6 4s1 3d5

( completely half-filled d-orbital )

electronic configuration Cr3+ is [Ar] 3d3

Answer: C

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