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MDCAT Past Papers - UHS - Chemistry - Chap No 5 - 2015 Quiz

Attempt 10 MCQs on MDCAT Past Papers - UHS - Chemistry - Chap No 5 (Year 2015) | Quiz 1

1. The equation that represents enthalpy of atomization of hydrogen is:

½H₂O(g) → H(g) +218 kJ mol⁻¹
½H₂(g) → H(g) +218 kJ mol⁻¹
H₂O(g) → 2H(g) +218 kJ mol⁻¹
½H₂(g) → H(g) –218 kJ mol⁻¹

2. Standard enthalpy of combustion of graphite at 25°C is –395.41 kJ/mol and that of diamond is –393.5 kJ/mol. The enthalpy change of graphite to diamond is:

–1.91
2.1
2.91
1.91

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