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Boron, Diboron, Silcon property bonding questions

Boron does each of the following EXCEPT
a) Acts as a reducing agent with some metal oxides
b) Reduces concentrated nitric acid
c) Forms compounds with the halogens that can hydrolyze
d) Forms some covalent compounds that are Lewis bases
e) Forms hydrides that ignite spontaneously in air
Which of the following statements concerning diborane is INCORRECT?
a) There are two three-center bonds
b) It is known as an electron deficient compound
c) It is flammable in air
d) It has a boron-boron bond
e) None of the above
Silicon does not undergo extensive catenation (bonding to itself) because:
1. The silicon-silicon bond is weaker than the C-C bond
2. Silicon forms strong bonds with a variety of nonmetal atoms
3. Silicon has a very high melting point

a) 1. Only
b) b) 2. Only
c) c) 3. Only
d) d) 1. and 2.
e) 1., 2., and 3.


Solution Preview

1. A Lewis base is any substance, such as the OH- ion, that can donate a pair of non-bonding electrons. A Lewis base is therefore an electron-pair donor. Boron can not act as a Lewis ...