AP Police Constable practice question
The molecular mass of a compound is 63 u. If it contains one hydrogen atom and three oxygen atoms, the atomic mass of the remaining element is:
From a AP Police Constable Science practice set · Science
Tap an option to check your answer.
Show answer and explanation
Correct answer: (A) 14 u
H contributes 1 u and 3 oxygen atoms contribute 3x16=48 u, totalling 49 u. Remaining mass = 63 - 49 = 14 u, which corresponds to nitrogen (compound is HNO3).
हिंदी में प्रश्न
किसी यौगिक का आणविक द्रव्यमान 63 u है। यदि इसमें एक हाइड्रोजन परमाणु और तीन ऑक्सीजन परमाणु हैं, तो शेष तत्व का परमाणु द्रव्यमान ____________________ है।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) 14 u
1 हाइड्रोजन परमाणु का द्रव्यमान 1u तथा 3 ऑक्सीजन परमाणुओं का द्रव्यमान 3×16=48u है, कुल 49u। शेष द्रव्यमान = 63−49 = 14u है, जो नाइट्रोजन का है (यौगिक HNO₃ है)।
More solved Science questions
- The ratio of sine of the angle of incidence to the sine of the angle of refraction is a constant for a given colour and for the given pair…
- __________ is the inflammatory compound in pepper spray.
- The splitting of white light into its constituent colours when passed through a prism is called:
- The upward and downward growth of shoots and roots, respectively, in response to the pull of earth or gravity, is called:
- A small drop of a liquid falling freely in air takes a spherical shape mainly because of
- The force of attraction between the Earth and any object near its surface is called: