P Block Elements

[a]

%7B%7B%5Ctext%7BI%7D%7D_%7B%5Ctext%7B2%7D%7D%7D%5Ctext%7B%2B%7D%5C%2C%5Ctext%7B10%7D%5Coverset%7B%5Ctext%7B%2B%7D%5C%2C%5Ctext%7B5%7D%7D%7B%5Cmathop%7B%5Ctext%7BHN%7D%7D%7D%5C%2C%7B%7B%5Ctext%7BO%7D%7D_%7B%5Ctext%7B3%7D%7D%7D%5Cxrightarrow%7B%7B%7D%7D

2HI%7B%7BO%7D_%7B3%7D%7D%2B10%5Coverset%7B%2B2%7D%7B%5Cmathop%7BNO%7D%7D%5C%2C%5C%2C%2B%5C%2C4%7B%7BH%7D_%7B2%7D%7DO

In the reaction

%5Ctext%7BHN%7D%7B%7B%5Ctext%7BO%7D%7D_%7B%5Ctext%7B3%7D%7D%7D

is acting as oxidizing agent because i|Ls oxidation state is decreasing from + 5 to + 2.
[b]

%5Ctext%7B3Cu%7D%5C%2C%5Ctext%7B%2B%7D%5C%2C%5Ctext%7B8%7D%5Coverset%7B%5Ctext%7B%2B5%7D%7D%7B%5Cmathop%7B%5Ctext%7BHN%7D%7D%7D%5C%2C%7B%7B%5Ctext%7BO%7D%7D_%7B%5Ctext%7B3%7D%7D%7D%5Cxrightarrow%7B%7B%7D%7D

3Cu%7B%7B(N%7B%7BO%7D_%7B3%7D%7D)%7D_%7B2%7D%7D%2B2%5Coverset%7B%2B2%7D%7B%5Cmathop%7BNO%7D%7D%5C%2C%2B4%7B%7BH%7D_%7B2%7D%7DO

It is reaction in which

%5Ctext%7BHN%7D%7B%7B%5Ctext%7BO%7D%7D_%7B%5Ctext%7B3%7D%7D%7D%20%3Cbr%20%2F%3E

is acting as oxidising agent because oxidation number of nitrogen is decreasing.
[c]

4Zn%2B10%5Coverset%7B%2B5%7D%7B%5Cmathop%7BHN%7D%7D%5C%2C%7B%7BO%7D_%7B3%7D%7D%5Cxrightarrow%7B%7B%7D%7D4Zn%7B%7B(N%7B%7BO%7D_%7B3%7D%7D)%7D_%7B2%7D%7D

%2B%5C%2CN%7B%7BH%7D_%7B4%7D%7D%5C%2C%7B%7B%5Coverset%7B%2B2%7D%7B%5Cmathop%7BNO%7D%7D%5C%2C%7D_%7B3%7D%7D%5C%2C%2B3%7B%7BH%7D_%7B2%7D%7DO

%5Ctherefore

It is also a reaction, in which

%5Ctext%7BHN%7D%7B%7B%5Ctext%7BO%7D%7D_%7B%5Ctext%7B3%7D%7D%7D

is oxidizing agent.
[d]

2HN%7B%7BO%7D_%7B3%7D%7D%2B%7B%7BP%7D_%7B2%7D%7D%7B%7BO%7D_%7B5%7D%7D%5Cxrightarrow%5B%7B%7D%5D%7B%7B%7D%7D2HP%7B%7BO%7D_%7B3%7D%7D%2B%7B%7BN%7D_%7B2%7D%7D%7B%7BO%7D_%7B5%7D%7D

%7B%7BP%7D_%7B2%7D%7D%7B%7BO%7D_%7B5%7D%7D

dehydrating agent.
So in this reaction

%5Ctext%7BHN%7D%7B%7B%5Ctext%7BO%7D%7D_%7B%5Ctext%7B3%7D%7D%7D

does not act as oxidizing agent.

Chapter Questions
5 MCQs