Question 10. For the oxidation element compound Me (II) to compound Me (III) the easiest (reviewed under the same conditions)?
A) Ni b) Co c) Fe d) Cu
Verse 11: ion (+2) below domestic susceptible to oxidation to ions (+3) most (at the same conditions)?
a) Mn 2 + b) Co2 + c) Fe 2+ d) Cr2 +
Explain
elements from Cr to Co 3d in sequence. As a rule in the cycle from left to right, the high positive oxidation resistance gradually, so as time goes on more and reliable +2 oxidation number, more complex hexaaqua of Cr (+2) Balance configuration d3d1 1e than saturated configuration d3 sale should be strongly reducing.
Question 12. Which of the following acid most unstable?
a) HClO b) HClO2 c) HClO3 d) HClO4
Question 13. Which of the amino acid under this is the most unstable?
a) HClO4 b) HBrO4 c) HIO4 d) HIO3
acid Question 14. Which of the following is the strongest acid?
a) HBrO b) HBrO3 c) HBrO4 d) HBrO2
Question 15. What hydroxide under here the most efficient in the air?
a) Fe (OH) 2 b) Co (OH) 2 c) Ni (OH) 2 d) Mn (OH) 2
Question 16: Which of the following most durable hydroxide in the air?
a) Mn (OH) 2 b) Co (OH) 2 c) Ni (OH) 2 d) V (OH) 2
Interpretation
of this hydroxide belong 3d elements, thus most durable nickel hydroxide matching rules high positive oxidation number of cycles from left to right gradually unstable.
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