Which one among the following nitrogen compounds has the least percentage of nitrogen by mass?

examrobotsa's picture

Submitted by examrobotsa on

Q: 41 (NDA-I/2012)

Which one among the following nitrogen compounds has the least percentage of nitrogen by mass?

question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,14,25,14,20,3,2

keywords: 

{'nitrogen compounds': [0, 0, 0, 1], 'nh4no3': [0, 0, 0, 1], 'nitrogen': [1, 1, 0, 2], 'nh4oh': [0, 0, 0, 1], 'nh3': [0, 0, 2, 5], 'least percentage': [0, 0, 1, 1], 'mass': [0, 0, 2, 3]}

Among the given options, option 1, (NH4)3PO4, has the least percentage of nitrogen by mass.

Option 1, (NH4)3PO4, is a compound containing ammonium ions and phosphate ions. The formula indicates that there are three ammonium ions and one phosphate ion in the compound. Each ammonium ion, NH4+, contains one nitrogen atom, and the phosphate ion, PO4^3-, does not contain any nitrogen atoms. Therefore, the percentage of nitrogen by mass in (NH4)3PO4 is relatively lower compared to the other options.

Option 2, NH3, represents ammonia, which contains a single nitrogen atom per molecule. It has a higher percentage of nitrogen by mass compared to option 1.

Option 3, NH4OH, is the chemical formula for ammonium hydroxide. It consists of one ammonium ion (NH4+) and one hydroxide ion (OH^-). The ammonium ion contains one nitrogen atom. Therefore, it has a higher percentage of nitrogen by mass compared to option 1.

Option 4, NH4NO3, represents ammonium nitrate. It contains one ammonium ion (NH4+) and one nitrate ion (NO3