Chemistry Problems!?

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1.Which of the following has the largest bond energy?
a)(O2)^2+
b)(O2)^+
c)O2
d)(O2)^-
e)(O2)^2-

2.An alkene, formula C6H12, loses its chirality on reaction with hydrogen gas on a catalytic surface to form an alkane, C6H12. The name of the alkene s:
a)2-hexene
b)3-hexene
c)2-ethyl-1-butene
d)3-methyl-1-pentene
e)3-methyl-2-pentene

3.The Ksp for sliver chloride, AgCl (used in photography) is 2.8 x 10 ^-10 at a given temperature. The solubility of AgCl in 0.010M HCl solution, expressed in mole per litre, at this temperature will be:
a)2.8 x 10^-12
b)2.8 x 10^-8
c)5.6 x 10^-8
d)2.8 x 10^-4
e)5.6 x 10^-4

4.In an SN2 reaction involving ethoxide ion and 1-bromopropane:
a)Ethoxide ion acts a Brosted acid and an electrophile
b)Ethoxide ion acts as a Lewis base and a nucleophile
c)1-bromopropane acts as a Bronsted acid and a nucleophile
d)1-bromopropane acts as a Lewis acid and a nucleophile
e)1-bromopropane acts as a Lewis base and a nucleophile