Chemical Engineering Basics

111. Aluminium is extracted from

1. Chalcocite
2. Bauxite
3. Galena
4. None of these

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112. Ammonia gas can be dried by

1. PCl₅
2. Quick lime
3. CaCl₂
4. Concentrated H₂SO₄

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113. Ammonia leakage in the refrigeration system is detected by

1. Sulphur stick, which on detection gives white smoke
2. Using chemical reagents
3. Its smell
4. Soap solution

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114. An abrupt and sudden fall in the reading of barometer is an indication of the

1. Storm
2. Rain
3. Clear weather
4. Cold wave

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115. An alloy of Fe - 0.4 % C is

1. Cast iron
2. Hypo-eutectoid steel
3. Hyper-eutectoid steel
4. Eutectoid steel

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116. An approximately __________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section.

1. Adiabatic
2. Isothermal
3. Isentropic
4. Isochoric

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117. An atom bomb works on the principle of

1. Nuclear fission
2. Nuclear fusion
3. Both the nuclear fission & fusion
4. Ionisation

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118. An example of unsteady non uniform flow is the flow of liquid under pressure through a

1. Tapering pipe at constant flow rate
2. Tapering pipe at either decreasing or increasing flow rate
3. Long pipeline of constant diameter
4. None of these

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119. An ideal material for making cooking vessels should have

1. High heat capacity
2. Low heat capacity
3. High thermal conductivity
4. Both (B) and (C)

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120. An oxidation process is accompanied with decrease in the

1. Number of electrons
2. Oxidation number
3. Number of ions
4. All (A), (B) & (C)

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