Oxidation Numbers in HCN

The video tutorial explains how to determine the oxidation numbers for each atom in HCN. It begins by identifying the oxidation number of hydrogen as +1 when paired with a non-metal. Since carbon and nitrogen are not directly listed in the rules, the video uses the concept of electronegativity to assign nitrogen an oxidation number of -3, based on its group in the periodic table. The neutrality of the compound is used to deduce that carbon must have an oxidation number of +2. The tutorial concludes with a recap of the process and the final oxidation numbers for HCN.

What are the colors used to represent hydrogen, carbon, and nitrogen in the video?

• Red, Blue, Green

• White, Black, Purple

• Yellow, Black, Red

• Green, White, Blue

What is the oxidation number of hydrogen when it is bonded with a non-metal?

• +2

• -1

• 0

• +1

Which element's electronegativity is considered to assign its oxidation number in HCN?

• Carbon

• Oxygen

• Hydrogen

• Nitrogen

What is the oxidation number of nitrogen in HCN?

• +3

• -5

• -3

• +5

Why is the oxidation number of nitrogen assigned as -3?

• Because it is in group 15 and has a -3 charge

• Because it is a metal

• Because it is the least electronegative

• Because it is in group 17 and has a -1 charge

What must be the oxidation number of carbon in HCN to ensure the compound is neutral?

• +4

• 0

• -2

• +2

How do the oxidation numbers of all atoms in a neutral compound like HCN add up?

• They add up to +2

• They add up to 0

• They add up to -1

• They add up to +1

What is the final oxidation number of carbon in HCN?

• +1

• +2

• -2

• 0

What is the main challenge in determining the oxidation numbers in HCN?

• The presence of a metal

• The compound is not neutral

• The absence of direct rules for carbon and nitrogen

• The presence of multiple hydrogen atoms