Question 11 : Which of these compounds is used in toothpastes as a source of fluoride ion to harden dental enamel
stannous fluoride
germanium fluoride
carbon tetra fluoride
Silicate fluoride
Question 12 : Silicones are a group of-------------
Organosilicon polymers
tetrachloro silicate polymer
silicon dioxide
organosilicates
Question 13 : Which form of phosphorous is most reactive?
red
white
brown
black
Question 14 : Which of these group V elements form the most stable pentahalides
B
P
As
Sb
Question 15 : Which of the group V element forms alloys with metals?
Ar
Bi
Sb
N
1
Expert's answer
2017-04-08T21:44:25-0400
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