Question

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

Answer 1

Solution.
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 phosphorus 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