Solved question paper for CHEM May-2015 (DIPLOMA 1st-2nd)

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Chemistry May-2015

PSBTE • DIPLOMA • Information Technology • 1st-2nd • May-2015

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

The earthy impurities present in the ores are called _________.

Fill in the Blanks 1 Marks May-2015 • PSBTE DIPLOMA

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May 2019 The earthly impurities present in the ores are called _______.
The formula of Galena is _________.

Fill in the Blanks 1 Marks May-2015 • PSBTE DIPLOMA

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Coating of iron with zinc by hot dipping method is called _________.

Fill in the Blanks 1 Marks May-2015 • PSBTE DIPLOMA

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Dec 2016
Coating of iron with zinc by hot dipping method is called ..............
Unit of heat is _________.

Fill in the Blanks 1 Marks May-2015 • PSBTE DIPLOMA

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Dec 2016
The unit of heat is ............ .

May 2015 The unit of heat is _________.

In the combustion of fuel _____ reaction occurs.

Fill in the Blanks 1 Marks May-2015 • PSBTE DIPLOMA

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May 2018
In combustion of fuels ……………………… reactions occur.
A good lubricant should have ________ flash point.

Fill in the Blanks 1 Marks May-2015 • PSBTE DIPLOMA

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May 2018
A good lubricant should have …………………… flash point.

Dec 2018 A good lubricant should have _______ boiling point.

Dec 2018 A good lubricant should have _______ boiling point.

May 2016
A good lubricant should have ________flash point.
A thinner is added in a paint to decrease its _______.

Fill in the Blanks 1 Marks May-2015 • PSBTE DIPLOMA

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S in Buna S rubber stands for _________.

Fill in the Blanks 1 Marks May-2015 • PSBTE DIPLOMA

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Least polluting car fuel is _________.

Fill in the Blanks 1 Marks May-2015 • PSBTE DIPLOMA

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Dec 2017
Least polluting car fuel is _______
Human ear can tolerate noise up to ________ decibel.

Fill in the Blanks 1 Marks May-2015 • PSBTE DIPLOMA

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Galvanised sheets of iron are coated with tin.

True / False 1 Marks May-2015 • PSBTE DIPLOMA

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May 2015 Galvanised sheets of iron are coated with zinc.
Diesel is natural occurring liquid oil.

True / False 1 Marks May-2015 • PSBTE DIPLOMA

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A good lubricant has high pour point.

True / False 1 Marks May-2015 • PSBTE DIPLOMA

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Fibres are weaker than elastomers.

True / False 1 Marks May-2015 • PSBTE DIPLOMA

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May 2019 Fibers are weaker than elastomers.

Dec 2017
Fibres are weaker than elastomers.
Chloroethene is the monomer of PVC.

True / False 1 Marks May-2015 • PSBTE DIPLOMA

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Dec 2017
Chloromethane is the monomer of PVC.

Dec 2011 Chloroethene is the monomer of PVC.
Explain roasting and smelting.

Short Answer 5 Marks May-2015 • PSBTE DIPLOMA

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Dec 2015 Explain smelting and calcinations.

What are the factors which influence the rate of corrosion?

Short Answer 5 Marks May-2015 • 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 2019 What are the factors that influence the rate of 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?

Dec 2015 What is the cause of corrosion?
What is a water gas? Give its composition and uses.

Short Answer 5 Marks May-2015 • PSBTE DIPLOMA

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Dec 2018 Give composition and uses of water gas.

Dec 2018 Give composition and uses of water gas.

May 2016
What is water gas? Give its composition and uses.

May 2015 What is water gas?

May 2015 Give the composition and uses of water gas.
What are the characteristics of a good lubricant?

Short Answer 5 Marks May-2015 • 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?

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 lubricants?

Dec 2015 What are the functions of lubricants?
Define enamel. Give its composition and uses.

Short Answer 5 Marks May-2015 • PSBTE DIPLOMA

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Dec 2018 What is enamel?

Dec 2018 What are the constituents of enamels?

Dec 2018 What are the applications of enamels?

Dec 2018 What is enamel? What are the constituents and applications of enamels?

May 2015 What is an enamel?

May 2015 Write the constituents of enamel.

Dec 2011 What is an enamel? Write constituents and applications of enamels.

Explain addition and condensation polymers.

Short Answer 5 Marks May-2015 • PSBTE DIPLOMA

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May 2021
Define addition and condensation polymerization. Give one example of each.

May 2020 What are addition and condensation polymers? Give examples.

Dec 2018 Explain addition polymers with examples.

Dec 2018 Explain condensation polymers with examples.

Dec 2018 Explain addition polymers with examples.

Dec 2018 Explain condensation polymers with examples.

May 2016
Explain addition and condensation polymers.

Dec 2011 Explain condensation polymerization using nylon as an example.
Define adhesives. How are they classified?

Short Answer 5 Marks May-2015 • PSBTE DIPLOMA

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What is noise pollution? How can we control noise polluting?

Short Answer 5 Marks May-2015 • PSBTE DIPLOMA

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Define corrosion. How is it different from erosion?

Short Answer 5 Marks May-2015 • PSBTE DIPLOMA

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May 2021 Define corrosion? How is it different from erosion?

May 2020 What is difference between corrosion and erosion?

Dec 2018 What is the difference between erosion and corrosion?

Dec 2018 What is the difference between erosion and corrosion?

Dec 2017
Define erosion. How it is different from corrosion?

Dec 2015 How is erosion different from corrosion?

Describe the composition and uses of nichrome and gun metal.

Long Answer 6 Marks May-2015 • PSBTE DIPLOMA

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May 2020 Give the composition and uses of gun metal and brass.

May 2015 Describe the properties and uses of Gun metal.

Dec 2015 Describe the composition and uses of Gun metal.
Define fuels. How are they classified?

Long Answer 6 Marks May-2015 • PSBTE DIPLOMA

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May 2016
Describe classification of fuel.

May 2015 What are fuels?
Define emulsification, saponification value, iodine value, flash point, fire point and pour point.

Long Answer 6 Marks May-2015 • PSBTE DIPLOMA

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May 2016
Define oiliness, saponification value, volatility, emulsification, cloud point and pour point.
What is paint? State main characteristics of a good paint.

Long Answer 6 Marks May-2015 • PSBTE DIPLOMA

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May 2019 What are the characteristics of a good paint?

May 2016
What are the characteristics of a good paint?

What are plastics? Give constituents and applications of plastics.

Long Answer 6 Marks May-2015 • PSBTE DIPLOMA

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Dec 2017
Define plastic. Give constituent and applications of plastics.
Explain stress corrosion and high temperature corrosion.

Long Answer 6 Marks May-2015 • PSBTE DIPLOMA

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May 2018
Explain the term galvanic corrosion?

Dec 2017
Explain electro chemical theory of corrosion.

Dec 2016
Comparison of chemical and electro-chemical corrosion?

Dec 2015 Explain stress corrosion.
Describe primary and secondary pollutants, biodegradable and non-biodegradable pollutants.

Long Answer 6 Marks May-2015 • PSBTE DIPLOMA

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May 2016
Describe primary and secondary pollutants, biodegradable and non Biodegradable pollutants.
What are the constituents of biogas and oil gas? Give their uses.

Long Answer 6 Marks May-2015 • PSBTE DIPLOMA

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Dec 2018 How is biogas produced?

Dec 2018 How is biogas produced? Name its main constituents.

Dec 2016
What is biogas? Give its composition and uses?

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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-2015 (DIPLOMA 1st-2nd)

Chemistry May-2015

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