CPI

Question 1

Adolf Baeyer’s contribution in medicine, made by reacting malonic acid and urea with a catalyst is called.

Answer 1

Barbituric acid (Malonic Ester Synthesis)

Question 2

Which industry produces electricity aside from its main product?

Answer 2

Nuclear Industry, Oil and Gas Industry

Question 3

Cement dust is characterized by very fine particulates. The exhaust gas temperatures from a cement kiln are very hot. Which of the following airpollution control devices would
appear to be appropriate?

Answer 3

Fabric filters, Electrostatic precipitators, Wet scrubbers

Question 4

Charles Goodyear discovered that mixing hot rubber with sulfur produced a stronger and a more elastic material. This process results in cross-linking of the hydrocarbon chains by disulfide bonds. What is this process called?

Answer 4

Vulcanization

Question 5

The type of treatment of municipal waste water involving bubbling of air

Answer 5

Aeration

Question 6

It is the most efficient process for hydrogen gas production which emits less amount of carbon.

Answer 6

Electrolysis

Question 7

Serendipity is a category used to describe scientific discoveries that occur at the intersection of chance and wisdom, examples of which are discoveries of Teflon, penicillin, and aspartame. Who coined the word “serendipity”?

Answer 7

Horace Walpole

Question 8

What is the most commonly used coagulant?

Answer 8

Aluminum sulfate, Alum [ Al2(SO4)3 ]

Question 9

Brass is an alloy of

Answer 9

Copper and Zinc (Cu & Zn)

Question 10

A product of alumina and silica at high temperature.

Answer 10

Alumina Silicate (Al2SiO5)

Question 11

A type of wastewater treatment process for treating sewage or industrial wastewater using aeration and a biological floc composed of bacteria and protozoa.

Answer 11

Activated sludge process

Question 12

A substance which can be readily converted into dye or other colored compound.

Answer 12

Dye precursor

Question 13

This type of coal is a valuable domestic fuel because of its clean-burning characteristics. It has the highest carbon content among different types of coal.

Answer 13

Anthracite coal

Question 14

Acetylene can be produced industrially from the hydrolysis of?

Answer 14

Calcium carbide (CaC2)

Question 15

Cement mainly contains

Answer 15

primarily of calcium silicate, aluminates and ferrites
Other compounds like gypsum, limestone and other additives.

Question 16

Glass manufacturing procedures may be divided into four major phases. What is the correct order of these phases?

Answer 16

Batch Preparation (Melting-Forming-Finishing)

Question 17

This phase involves two (2) operations: (1) holding a mass of glass above a certain critical temperature long enough to reduce internal strain by plastic flow to less than a predetermined maximum and (2) cooling the mass to room temperature slowly enough
to hold the strains below this same maximum.

Answer 17

Annealing

Question 18

It is the major industrial process for smelting aluminium. It involves electrolysis of alumina (Al2O3) dissolved in a fused bath of cryolite.

Answer 18

Hall-Heroult process

Question 19

Oil shale is an organic-rich fine-grained sedimentary rock also known as

Answer 19

Shale/Kerogen shale

Question 20

This is the current method of producing sulphuric acid in high concentrations. Platinum
used to be the catalyst for the reaction but V2O5 is now preferred. This process also produces SO3 and oleum.

Answer 20

Contact process