问题标题：
【问一些化学问题（英文的）1)Thestepwiseformationconstantsforthecomplex[Ni(NH3)6]Cl2arelog10K1=2.72,log10K2=2.17,log10K3=1.66,log10K4=1.12,log10K5=0.67andlog10K6=-0.03.Thelog10β6istherefore:】
问题描述：
问一些化学问题（英文的）
1)
Thestepwiseformationconstantsforthecomplex[Ni(NH3)6]Cl2are
log10K1=2.72,
log10K2=2.17,
log10K3=1.66,
log10K4=1.12,
log10K5=0.67and
log10K6=-0.03.
Thelog10β6istherefore:-
A.8.31
B.8
C.8.34
D.4.04
2)
Therearefivedimethylhexaneisomers.Whichone(s)canexhibitopticalactivity?(SelectALLcorrectanswers)
A.3,3-dimethylhexane
B.2,3-dimethylhexane
C.2,4-dimethylhexane
D.2,5-dimethylhexane
E.2,2-dimethylhexane
3)
Selecttheactivenitratingspeciesinaromaticnitrationreactionsinvolvingamixtureofconcentratednitricandconcentratedsulfuricacids:
A.HO-NO2
B.NO2-
C.NO2+
D.HO-SO2-ONO2
E.[H2O-NO2]+
4)
Whatclassoforganiccompoundishydrolysedinaqueousacidtoproduceacarboxylicacidandanalcohol?
古永红回答：
1)?
2)abce
3)d
4)Ester
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