Stoichiometry
1 kg of calcium carbide (CaC₂) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour?

20
15
5
10

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Stoichiometry
The heat capacity of a substance is

Higher for solid state than for liquid state
Greater for liquid state than for solid state
Equal for solid and liquid states below melting point
Lower for liquid state than for gaseous state

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