Solved question paper for CHEM May-2019 (DIPLOMA 1st-2nd)

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Chemistry May-2019

PSBTE • DIPLOMA • Information Technology • 1st-2nd • May-2019

CHEM (chemistry) for Punjab State Board of Technical Education Diploma in Engineering 1st-2nd semester students is collected here as subject-wise previous year question papers and old papers for quick revision. Students can use these PYQ papers to understand the exam pattern, check repeated questions, and prepare important topics in a simple, semester-wise way. This page helps you find and download diploma question paper PDFs for CHEM and review common unit-wise questions before exams. BRpaper is not the official website of the Punjab State Board of Technical Education, and the papers here are meant for study reference and exam preparation only.

Question papers (year-wise) Solutions

Solved Questions

Solved

Sulphide ores are concentrated by _______process.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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May 2019 Sulphide ores are concentrated by ____________ process.

May 2016
Sulphide ores are concentrated by ______________process.

May 2015 Sulphide ores are concentrated by _________.
The earthly impurities present in the ores are called _______.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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May 2015 The earthy impurities present in the ores are called _________.
Chromising is the process of depositing _______ on iron.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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May 2015 Chromizing is the process of depositing ____________ on iron by cementation.
Percentage of volatile matter in coal can be determined by _______ analysis.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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Water gas is a mixture of carbon monoxide and _______.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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Dec 2017
Water gas is a mixture of hydrogen and ____________

Dec 2015 Water gas is a mixture of _____________.
Suspension of graphite in water is called _______.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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May 2015 Suspension of graphite in water is called ___________.

Dec 2011 Suspension of graphite in water is called as ________
The unit of viscosity is _______.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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May 2018
The unit of viscosity is ……………………. .

Dec 2018 Units of viscosity are _______.

Dec 2018 Units of viscosity are _______

May 2017
The unit of viscosity is ______.
A pigment imparts _______ to paint.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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May 2017
A pigment imparts ______ to paint.

Natural rubber is a polymer of _______.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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May 2016
Rubber is a natural polymer.

Dec 2015 Natural rubber is a polymer of _________.

Dec 2011 Natural rubber is an elastomer.
BOD stands for _______.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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Annealing of steel causes softening of steel.

True / False 1 Marks May-2019 • PSBTE DIPLOMA

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May 2019 Annealing is the process to make steel soft in nature.
Fire clay bricks are basic in nature.

True / False 1 Marks May-2019 • PSBTE DIPLOMA

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A good fuel has high moisture content.

True / False 1 Marks May-2019 • PSBTE DIPLOMA

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May 2019 A good fuel should have _____ moisture content.

May 2015 A good fuel has higher moisture content.

Dec 2015 A good fuel has low moisture content.
Bakelite becomes hard on heating and can be remoulded.

True / False 1 Marks May-2019 • PSBTE DIPLOMA

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Cow dung is biodegradable.

True / False 1 Marks May-2019 • PSBTE DIPLOMA

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Differentiate between roasting and calcination.

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2020 Differentiate between roasting and calcinations.

May 2019 Distinguish between roasting and calcinations.

Explain the process of electrolytic reduction for extraction of metals from their fused salts.

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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State and explain Pilling-Bedworth rule.

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2017
State and explain Pilling- Bedworth rule.
What is galvanization?

Very Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2021 What is galvanization of iron? Explain.

May 2021
What is galvanization?

May 2020 What is Galvanization? How it is done?

May 2019 Write brief note on galvanization.

Dec 2018 Define the term galvanization.

Dec 2018 Define the term galvanization.
Write a short note on hydrogen as a future fuel.

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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What are the characteristics of a good fuel?

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2020 What are the characteristics of a good fuel?

May 2019 What are characteristics of a good fuel?

Dec 2018 What are the characteristics of a good fuel?

Dec 2018 What are the characteristics of a good fuel?

Dec 2017
What are fuels? Give the characteristics of good fuel.

Dec 2016
What is fuel? What are the characteristic of good fuel?

Dec 2015 What are the characteristics of a good fuel?

Dec 2011 What are the characteristics of a good fuel?
What is fire point and flash point of a lubricant?

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2021 What is flash point and fire point of a lubricant?

May 2021
Define flash and fire point of lubricants.

Dec 2018 Explain flash point of a lubricant.

Dec 2018 Explain fire point of a lubricant.

Dec 2018 Explain flash point and fire point of a lubricant.

May 2015 Explain flash and fire points as applied to lubricants.
Explain the mechanism of hydrodynamic lubrication.

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2021 Discuss in detail the mechanism of lubrication.

May 2020 Explain fluid film mechanism of lubrication.
Give detailed account of three main types of refractories.

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2019 What are refractories?

May 2018
Define Refractories? How will you classify Refractories?

Dec 2018 What are refractories?

Dec 2018 What are refractories? Explain its types with examples.

Dec 2015 What are refractories?

Dec 2015 Explain the types of refractories.

Define glass and give its chemical composition.

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2017
What is a glass? What is the composition of glass?

Dec 2017
What is glass? Give composition and uses of glass.
Differentiate between thermoplastics and thermosetting plastics.

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2019 Distinguish between thermoplastics and thermosetting plastics.

Dec 2018 What is the difference between thermoplastic and thermosetting polymers?

Dec 2018 What is the difference between thermoplastic and thermosetting polymers?

May 2017
Differentiate between thermoplastics and thermosetting plastics.

Dec 2017
Difference between thermoplastic and thermosetting plastics?

May 2016
Differentiate between thermoplastics and thermosetting plastics.

Dec 2016
Differentiate between thermoplastic and thermosetting plastic with example?

May 2015 Differentiate between thermoplastics and thermosetting plastics with example.

Dec 2011 Differentiate between thermoplastics and thermosetting plastics.
Give the synthesis of Bakelite.

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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What are the various sources of air pollution?

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2018
What are the major sources of air pollution? What measures do you adopt to avoid it?

Dec 2017
What are main sources of air pollution?

Explain green house effect and global warming.

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2020 Explain Global warming.

Dec 2018 Explain greenhouse effect.

Dec 2018 Explain greenhouse effect.

Dec 2017
Explain green house effect and global warming.

May 2015 Explain greenhouse effect.

May 2015 Explain global warming.

Dec 2015 Explain global warming.
Give any five methods for the purification of metals.

Long Answer 10 Marks May-2019 • PSBTE DIPLOMA

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What are the factors that influence the rate of corrosion?

Short Answer May-2019 • PSBTE DIPLOMA

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May 2021 Give a detail account of factors influencing the rate of corrosion.

May 2019 What do you understand by corrosion?

May 2017
What is the cause of corrosion?

May 2016
What are the factors which influence the rate of corrosion?

May 2016
What are the causes and disadvantages of boiles corrosion?

May 2015 What are the factors which influence the rate of corrosion?

Dec 2015 What is the cause of corrosion?
Define metal cladding.

Very Short Answer May-2019 • PSBTE DIPLOMA

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Define metal spraying.

Very Short Answer May-2019 • PSBTE DIPLOMA

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Define cementation.

Very Short Answer May-2019 • PSBTE DIPLOMA

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Dec 2018 Explain the process of cementation.

Dec 2018 Explain the process of cementation.
What is the importance of proximate analysis of coal?

Short Answer May-2019 • PSBTE DIPLOMA

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May 2021
Give the importance of proximate analysis of coal.
Write a note on producer gas.

Short Answer May-2019 • PSBTE DIPLOMA

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Write a note on biogas.

Short Answer May-2019 • PSBTE DIPLOMA

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What are the functions of a lubricant?

Short Answer 10 Marks May-2019 • PSBTE DIPLOMA

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May 2021 What are the characteristics of a good lubricant?

May 2021
What are the functions of a lubricant?

May 2020 What are the functions of lubricants?

May 2019 What are the functions of a lubricant?

Dec 2018 What are the characteristics of a good lubricant?

Dec 2018 What are the characteristics of a good lubricant?

Dec 2017
What are functions of lubricants?

Dec 2017
What are lubricants? How are they classified?

Dec 2016
Define the term lubricant? What are the function of lubricant?

May 2015 What are the characteristics of a good lubricant?

May 2015 What are lubricants?

Dec 2015 What are the functions of lubricants?
Explain total acid number (TAN) of oils.

Short Answer 10 Marks May-2019 • PSBTE DIPLOMA

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Explain saponification value of oils.

Short Answer 10 Marks May-2019 • PSBTE DIPLOMA

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What is varnish?

Very Short Answer 10 Marks May-2019 • PSBTE DIPLOMA

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May 2019 What is varnish? What are its constituents?
What are the constituents of paint?

Short Answer 10 Marks May-2019 • PSBTE DIPLOMA

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May 2020 What are the constituents of paint?

Dec 2018 Name the various constituents of paint.

Dec 2018 Name the various constituents of paint.

May 2015 Name the various constituents of paint.

Dec 2015 Name various constituents of paint.
Classify the polymers on the basis of synthesis with chemical reactions.

Short Answer 10 Marks May-2019 • PSBTE DIPLOMA

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Define vulcanization of rubber.

Very Short Answer 10 Marks May-2019 • PSBTE DIPLOMA

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May 2019 What is vulcanization of rubber?

May 2015 Explain vulcanization of rubber.

Give advantages of vulcanized rubber.

Short Answer 10 Marks May-2019 • PSBTE DIPLOMA

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FAQ

Frequently Asked Questions

Answers about this subject, solved papers, and preparation.

Updated regularly

01 Where can I find CHEM previous year question papers for PSBTE Diploma?

You can use this CHEM subject page to find subject-wise previous year question papers for the PSBTE Diploma in Engineering 1st-2nd semester.

02 Can I download CHEM diploma question paper PDF from this page?

This page is meant to help students locate CHEM question paper PDFs and old papers for study and revision.

03 Are solved CHEM question papers available here?

Students often search for solved papers, but this page is mainly for previous year question papers and exam preparation material.

04 How do CHEM old papers help in exam preparation?

Old CHEM papers help you understand the exam pattern, spot repeated questions, and revise important units before the exam.

05 Is BRpaper the official website of Punjab State Board of Technical Education?

No. BRpaper is not the official website of Punjab State Board of Technical Education; it is a study reference page for question papers.

Solved question paper for CHEM May-2019 (DIPLOMA 1st-2nd)

Chemistry May-2019

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