Answer:
Br—Br bond is NON-POLAR
Explanation:
When two atoms are the same the electron pair stays in the middle of the bond.
Explanation:
The first involves keeping the surface of the concrete moist by the use ponding, spraying/sprinkling, damp sand or damp hessian.
The second prevents the loss of moisture from the concrete by covering it with polythene sheeting or leaving the formwork in place.
The third involves the use of spray or roller applied curing compounds.
Answer:
Chromium is reduced in forward reaction
Explanation:
A species is said to be oxidized if oxidation number of the species increases.
A species is said to be reduced if oxidation number of the species decreases.
Oxidation number of Cr in
= +6
Oxidation number of Cr in
= +3
So change in oxidation number of Cr in forward reaction = (+3)-(+6) = -3
Hence oxidation number of Cr decreases on going from
to
.
So, chromium is reduced in forward reaction.