Stoichiometry

21. 1 BTU/lb.←°F is equivalent to _________ kcal/kg.°C.

1. 1
2. 2.42
3. 1.987
4. 4.97

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22. 1 centipoise is equivalent to

1. 1 gm/cm.second
2. 1 centistoke
3. 2.42 lb/ft.hr
4. 2.42 lb/ft.second

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23. 1 gm mole of an alcohol whose molecular weight is 74 contains 48 gms of carbon, 10 gms of hydrogen and 16 gms of oxygen. Its molecular formula is

1. C₄H₉OH
2. C₃H₂1OH
3. (C₂H₄)2H₂.OH
4. C₂H₃₃OH

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24. 1 gm mole of methane (CH4) contains

1. 6.02 × 10²³ atoms of hydrogen
2. 4 gm atoms of hydrogen
3. 3.01 × 10²³ molecules of methane
4. 3 gms of carbon

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25. 1 Kcal/kg. °C is equivalent to _________ BTU/lb. °F.

1. 1
2. 2.42
3. 4.97
4. None of these

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26. 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?

1. 5
2. 10
3. 15
4. 20

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27. 1 kg/cm² is equal to

1. 760 torr
2. 1 KPa
3. 10 metres of water column
4. 1 metre of water column

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28. 1 kg/m² is equal to _________ mm water column.

1. 1
2. 10
3. 100
4. 1000

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29. 1 kgf/cm² is not equal to

1. 1 torr
2. 1 bar
3. 10000 mm wc
4. 100 KPa = 100 000 N/m²

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30. 1 Pascal (unit of pressure) is equal to _________ N/m².

1. 10
2. 1
3. 0.1
4. 1000

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