⚗️ Chemical Engineering Solved MCQs with Answers

Practice 1920 approved ⚗️ Chemical Engineering questions with verified answers from the 🛠️ Engineering Essentials subject for Pakistan exams.

1920 solved MCQs

Dezincification is a form of corrosion, which specifically applies toAnswer: Brass Water hammer in pipelines results, when the flowing fluidAnswer: Is suddenly brought to rest by closing a valve. The preferred alloying element for low temperature applications of steel isAnswer: Ni Out of the following, the dimensionless quantity isAnswer: Mach number When a copper ball is heated, the largest percentage increase will be in itsAnswer: Volume Which of the following hardness tests uses the depth of penetration caused by the indentor as the parameter for arriving at the hardness value of a material ?Answer: Rockwell hardness test. The most commonly used moderator in nuclear power plant isAnswer: Graphite In an isochoric process,Answer: No mechanical work is done by the system. Coke is added in the blast furnace toAnswer: Reduce & melt the iron ore. A balanced draught boiler furnace employs __________ draught fan.Answer: Both 'a' & 'b'. Aluminium oxide (an abrasive) is used for grindingAnswer: High speed steel In a casting, cold shut defect is caused byAnswer: Low pounhg temperature. What is the chemical formula of washing soda?Answer: Na₂CO₃.10H₂O Which of the following processes is the entropy change zero?Answer: Adiabatic Which one is a stronger Lewis Base?Answer: Pyridine Which one is more acidic?Answer: Hydrochloric acid (HCl) Which cannot undergo Aldol condensation reaction among the following?Answer: Benzaldehyde Crude oil is heated in the furnace up to?Answer: 350 ̊ C Which is used as moderator in atomic reactor?Answer: Heavy water Which one of the following constants is not related to radiation?Answer: Boltzmann’s constant Oxidation of secondary alcohols produces?Answer: Ketones The product of the reaction between an alcohol and a carboxylic acid is called ______?Answer: Ester The entropy of steam is ____ than ice.Answer: Greater NH3 is Lewis _____?Answer: Base The numerical value of the equilibrium constant for any chemical change is affected by changing the ______?Answer: Temperature Organ of human body which is considered on the largest organ is ______?Answer: Skin An empty Erlenmeyer flask weighs 100 g. When filled with liquid (d = 1.5 g/cm³), the flask and its contents weigh 250 g. What is the flask’s volume?Answer: 100 cm³ In nuclear power plants, energy is produced by?Answer: Heat released during nuclear fusion Which of the following is not a unit? Meter ,Velocity, Time ,KgAnswer: Velocity Which reagent can differentiate alcohol and phenol?Answer: Neutral FeCl₃