MCQ
Bones glow in the dark because
- AThey contain shining material
- BThey contain red phosphorus
- ✓White phosphorus undergoes slow combustion in contact with air
- DWhite phosphorus changes into red form
✓
Answer
Correct option: C.
White phosphorus undergoes slow combustion in contact with air
c
Bones are made of calcium and phosphorous. white phosphorous is an element which reacts with atmospheric oxygen and forms fumes like substance and glows in dark. this phenomenon is called as phosphorescence.
Bones are made of calcium and phosphorous. white phosphorous is an element which reacts with atmospheric oxygen and forms fumes like substance and glows in dark. this phenomenon is called as phosphorescence.
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$\begin{matrix}
C{{H}_{2}}-C{{H}_{2}}-C{{O}_{2}}H\xrightarrow[BaC{{O}_{3}}]{\Delta }A\xrightarrow{N{{H}_{2}}-N{{H}_{2}}}B\xrightarrow[KOH]{heat}(C), \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{2}}-C{{H}_{2}}-C{{O}_{2}}H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\end{matrix}$
→C{{H}_{2}}-C{{H}_{2}}-C{{O}_{2}}H\xrightarrow[BaC{{O}_{3}}]{\Delta }A\xrightarrow{N{{H}_{2}}-N{{H}_{2}}}B\xrightarrow[KOH]{heat}(C), \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{2}}-C{{H}_{2}}-C{{O}_{2}}H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\end{matrix}$
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