Question

it is found that {A+B}={A}. the necessarily implaies
1. B=0
2.A,B are antiparallel
3.A,B perpndicular
4.(A.B)<0

Answer 1

Answer:

1

Explanation:

B = 0 because when we add 0 in A no change in the value of A so (A+B) = A

Answer 2

Explanation:

The oxidation number fo nitrogen in HNO3 is +5. Thus, increase in oxidation number beyond +5 cannot occur. Hence, HNO3 cannot act as reducing agent. The oxidation number of nitrogen in HNO3 can only decrease; thus it acts as an oxidising agent.