Engineering Chemistry Question Papers Online Exam Quiz

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Determine the water equivalent of the bomb calorimeter apparatus which gave following data during experiment: Weight of benzoic acid taken = 2.12 gm, Weight of water taken in calorimeter = 2.5kg, Initial temperature= 16.970, Final temperature = 18.650, Cooling correction = 0.035 0C, fuse wire correction = 20 calories and cotton thread correction = 2.2 calories? (Calorific value of benzoic acid=6324)

Options

A : 7253.22 gm

B : 8366.50 gm

C : 7830.36 gm

D : 5330.36 gm

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In a bomb calorimeter experiment, following data was obtained: x = 0.85gm, W = 2.5kg, w = .5kg, observed rise in temperature = 2.25 0C, tA = 38.6 calories, tF = 6.8 calories, tT = 1.9 calories and tC = 0.05 0C. Calculate net calorific value if the coal contains 10 % hydrogen?

Options

A : 7533.7 cal/gm

B : 5704.655 cal/gm

C : 8062 cal/gm

D : 8.062 cal/gm

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Which of the following correction of bomb calorimeter is added to the observed raise in temperature?

Options

A : Acid correction

B : Fuse wire correction

C : Cotton thread correction

D : Cooling correction

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How is the heat liberated in fuse wire correction?

Options

A : By the breakage of fuse wire

B : Due to the material of fuse wire

C : Due to the ignition of fuse wire

D : Due to the length of fuse wire

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Which of the following correction are obtained in the largest amount in bomb calorimeter?

Options

A : Fuse wire correction

B : Acid correction

C : Cotton thread correction

D : Cooling correction

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For which of the following correction we should use a larger sample mass?

Options

A : Fuse wire correction

B : Cotton thread correction

C : Cooling correction

D : Acid correction

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On what basis does the acid correction is measured in bomb calorimeter?

Options

A : Gases present in the bomb

B : Due to formation of the compound after adding water in the bomb

C : Due to the presence of excess oxygen

D : Due to the material of the bomb

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To calculate the calorific value of coal using bomb’s calorimeter, which of the following compound are formed after the bomb is removed from the calorimeter?

Options

A : H2S and CO2

B : H2SO4 and HNO3

C : H2SO4 and NO2

D : SO2 and HNO3

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The correct cotton thread used for firing the charge is calculated from the weight of wet cotton thread.

Options

A : True

B : False

C :

D :

View Answer

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