Which of the following reaction can be made to proceed in the reverse direction under ordinary laboratory condition?
1)2Ca + O2 --->2CaO
2)2Hg+O2 ---->2HgO
3)2Ag2O ---->4Ag(s) +O2
4)Na2CO3 + 10H2O ---->Na2CO3．10H2O
A.(1) and (3)
B.(3) and (4)
C.(2) and (4)
D.(2),(3) and (4)
兩條chem的mc~中五level
2007-03-28 5:37 am
回答 (1)
2007-03-28 9:17 am
✔ 最佳答案
D,DFor the 1st question, the question ask you that if the reaction can be reversed in Laboratory.
1)2Ca + O2 --->2CaO <-- Can be reversed only by Electrolysis of molten CaO, so its reverse reaction cannot be done in lab
2)2Hg+O2 ---->2HgO <-- reversed by heating
3)2Ag2O ---->4Ag(s) +O2 <-- reversed by heating
4)Na2CO3 + 10H2O ---->Na2CO3．10H2O <-- reversed by dehydration
收錄日期: 2021-04-12 23:35:34
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