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Common Chemical Industries

Free 30+ Common Chemical Industries MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Practise below with answers and explanations.

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Common Chemical Industries — MCQs for Pakistan government job tests

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Common Chemical Industries

Practice questions

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1.Which of the following statements accurately describes urea?

It is an artificially manufactured fertilizerIt is derived from natural sources as a fertilizerIt supplies trace elements essential for plant growthIt is an inorganic compound that dissolves easily in water

2.What is the correct order of zones found in a rotary kiln?

drying area, combustion area, breakdown area, cooling sectioncooling section, combustion area, breakdown area, drying areacombustion area, cooling section, breakdown areadrying area, breakdown area, combustion area, cooling section

3.Which of the following substances is not used as a raw material in cement production?

LimestoneGypsumPotassium nitrate (KNO3)Iron oxide

4.Phosphorus primarily supports the development of which plant part?

RootsLeavesStemsSeedsFlowers

5.How is clinker best described in the context of cement production?

Heated calcareous substanceHeated argillaceous substanceHeated mixture of calcareous and argillaceous materialsHeated gypsum

6.What role does potassium play in plants?

It aids in the production of starch, sugars, and structural fibersIt helps in the maturation of fruits and seedsIt enhances the plant's ability to resist diseasesAll of the above functions are performed by potassium

7.Which of the following is classified as an inorganic fertilizer?

Animal manureUrea fertilizerAmmonium nitrateAll of the above

8.What is the term for nutrients that plants need in very minimal quantities for proper growth?

fertilizers rich in nitrogenmicronutrientsphosphorus-based fertilizersevery one of the above

9.Which of the following is not classified as an argillaceous material?

claymarine shellsslateblast furnace slagshale

10.Which potassium fertilizer is most beneficial for horticultural crops such as tobacco and potatoes?

Potassium chloride (KCl)Potassium nitrate (KNO3)Potassium sulfate (K2SO4)Potassium permanganate (KMnO4)None of the above

11.Which fertilizer among the following is unsuitable for use in paddy rice cultivation?

UreaDiammonium phosphate (DAP)Ammonium sulfateAmmonium nitrate

12.Which catalyst is most effective for the industrial synthesis of ammonia?

Platinum (Pt)Zinc oxide combined with chromium oxide (ZnO + Cr2O3)Iron supported on a fused mixture of alumina, silica, and magnesia (Fe with Al2O3 + SiO2 + MgO)All the catalysts mentioned above

13.Identify the macronutrient from the options listed below.

Copper (Cu)Chlorine (Cl)Hydrogen (H)Zinc (Zn)None of the above

14.Which of the following statements about the significance of nitrogen is incorrect?

It promotes overall plant development.It plays a role in creating proteins and nucleic acids.It speeds up the growth of fruits and flowers.It contributes to the production of chlorophyll.

15.What is the primary role of the burning zone in a rotary kiln?

To remove moisture from the slurryTo convert limestone into quicklimeTo facilitate the fusion of oxides such as CaO, SiO2, Fe2O3, and Al2O3To eliminate impurities

16.What is the typical proportion of limestone and clay in the raw material mixture used for cement production?

75% limestone and 25% clay25% limestone and 75% clay15% limestone and 55% clay55% limestone and 15% clay

17.What is the proper order of steps involved in the production of cement?

crushing, heating, mixing, grindingcrushing, mixing, heating, grinding, and mixing againcrushing, grinding, mixing, heatingmixing, heating, grinding, crushing

18.Cement is produced by heating a combination of various compounds in a rotary kiln. Which compound is present in the highest proportion?

Calcium oxide (CaO)Silicon dioxide (SiO2)Aluminum oxide (Al2O3)Magnesium oxide (MgO)

19.Cement is composed of which combination of materials?

Clinker and clayClay, limestone, and gypsumLimestone and gypsumLimestone and clay

20.Which fertilizer supplies both nitrogen and phosphorus nutrients to plants?

UreaCalcium superphosphateDiammonium phosphatePotassium nitrate

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How to prepare with Common Chemical Industries MCQs

Work through questions topic by topic, then revisit any you answered incorrectly.
Read explanations carefully—they often cover facts that repeat across PPSC, FPSC, and NTS papers.
Pair subject practice with past papers to see how Common Chemical Industries appears in real exam conditions.

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