Chemical Engineering - Chemical Engineering Basics

6. 

Ester is formed, when an alcohol reacts with

A. carboxylic acid
B. aldehyde
C. ketone
D. ether

Answer: Option A

Explanation:

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7. 

Which of the following accounts for maximum loss of energy in a coal fired boiler ?

A. Incomplete combustion of fuel.
B. Outgoing flue gases.
C. Radiation heat losses.
D. Unburnt carbon in ash.

Answer: Option B

Explanation:

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8. 

Presence of sulphur in the fuel fired in a furnace

A. contributes to its heating value.
B. helps in electrostatic precipitation of ash from flue gases.
C. corrodes ducts & air preheater, if the flue gas temperature is low.
D. all 'a' , 'b' & 'c'.

Answer: Option D

Explanation:

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9. 

Boiling temperature of carbon dioxide at atmospheric pressure is __________ °C.

A. -30.5
B. -78.5
C. -183.5
D. -10.5

Answer: Option B

Explanation:

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10. 

Eutectoid reaction for iron-carbon system occurs at a temperature of __________ °C.

A. 597
B. 959
C. 1147
D. 1493

Answer: Option D

Explanation:

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