A) \[a{{x}^{2}}+2hxy+b{{y}^{2}}=0\]
B) \[5{{h}^{2}}=ab\]
C) \[5{{h}^{2}}=9ab\]
D) \[9{{h}^{2}}=5ab\]
Correct Answer: C
Solution :
For \[\underset{1\,mol}{\mathop{CaC{{O}_{3}}}}\,\xrightarrow{\Delta }\underset{1\,mol}{\mathop{CaO}}\,+C{{O}_{2}}\] \[\because \] \[\text{CaO}\]
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