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

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Chemistry Dec-2015

PSBTE • DIPLOMA • Information Technology • 1st-2nd • Dec-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 formula of copper pyrite is _____________.

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

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Oxide ores are concentrated by ______________ process.

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

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May 2018
The process employed to concentrate an ore is called ………………….. .
Slow and continuous decay of metal by mechanical force is known as ________.

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

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Dec 2011 Slow and continuous decay of metals by mechanical force is known as ________
Water gas is a mixture of _____________.

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

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May 2019 Water gas is a mixture of carbon monoxide and _______.

Dec 2017
Water gas is a mixture of hydrogen and ____________

___________ number is used for rating diesel.

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

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May 2015 __________ number is used for rating diesel.
Lubrication is the process of decreasing _________ in the machine.

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

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Pigment varnish is called _________.

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

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Dec 2016
Pigment varnish is called ..............

Dec 2011 Pigmented varnish is called ________
Natural rubber is a polymer of _________.

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

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May 2019 Natural rubber is a polymer of _______.

May 2016
Rubber is a natural polymer.

Dec 2011 Natural rubber is an elastomer.

Fibres are __________ than elastomers.

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

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The major air pollutant is _________.

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

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The metals are electropositive in nature.

True / False 1 Marks Dec-2015 • PSBTE DIPLOMA

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A good fuel has low moisture content.

True / False 1 Marks Dec-2015 • PSBTE DIPLOMA

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May 2019 A good fuel should have _____ moisture content.

May 2019 A good fuel has high moisture content.

May 2015 A good fuel has higher moisture content.

Grease is low viscous in nature.

True / False 1 Marks Dec-2015 • PSBTE DIPLOMA

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All macromolecules are polymers.

True / False 1 Marks Dec-2015 • PSBTE DIPLOMA

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May 2015 All macro molecules are polymers.
Acidic soil damages the crops.

True / False 1 Marks Dec-2015 • PSBTE DIPLOMA

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Explain smelting and calcinations.

Long Answer 5 Marks Dec-2015 • PSBTE DIPLOMA

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May 2015 Explain roasting and smelting.

What is erosion?

Short Answer 5 Marks Dec-2015 • PSBTE DIPLOMA

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How is erosion different from corrosion?

Short Answer 5 Marks Dec-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?

May 2015 Define corrosion. How is it different from erosion?
What are the characteristics of a good fuel?

Short Answer 5 Marks Dec-2015 • 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?

May 2019 What are the 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 2011 What are the characteristics of a good fuel?
What are the functions of lubricants?

Short Answer 5 Marks Dec-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 the characteristics of a good lubricant?

May 2015 What are lubricants?

Name various constituents of paint.

Short Answer 5 Marks Dec-2015 • PSBTE DIPLOMA

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May 2020 What are the constituents of paint?

May 2019 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.
Explain the functions of a drying oil and thinner.

Short Answer 5 Marks Dec-2015 • PSBTE DIPLOMA

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May 2015 Explain the function of drying oil.
What do you understand by homopolymers and copolymers?

Short Answer 5 Marks Dec-2015 • PSBTE DIPLOMA

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May 2019 Explain homopolymers and co-polymers with examples.

Dec 2011 Define homopolymer and copolymer with suitable explain.
What are polymers?

Short Answer 5 Marks Dec-2015 • PSBTE DIPLOMA

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Dec 2017
What are the applications of polymers?

Dec 2015 Give applications of polymers.

Give applications of polymers.

Short Answer 5 Marks Dec-2015 • PSBTE DIPLOMA

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Dec 2017
What are the applications of polymers?

Dec 2015 What are polymers?
What is water pollution?

Short Answer 5 Marks Dec-2015 • PSBTE DIPLOMA

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May 2020 What are the sources of water pollution?

May 2016
What is air pollution? Give the sources of water pollution.

Dec 2016
What is water Pollution? Give the sources of water pollution?

Dec 2015 Give the sources of water pollution.

Dec 2011 Give three main causes of water pollution.
Give the sources of water pollution.

Short Answer 5 Marks Dec-2015 • PSBTE DIPLOMA

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May 2020 What are the sources of water pollution?

May 2016
What is air pollution? Give the sources of water pollution.

Dec 2016
What is water Pollution? Give the sources of water pollution?

Dec 2015 What is water pollution?

Dec 2011 Give three main causes of water pollution.
Define corrosion.

Short Answer 5 Marks Dec-2015 • PSBTE DIPLOMA

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What is the cause of corrosion?

Short Answer 5 Marks Dec-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?

May 2015 What are the factors which influence the rate of corrosion?
Describe the composition and uses of Brass.

Long Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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Dec 2018 Give composition and uses of brass.

Dec 2018 Give composition and uses of brass.
Describe the composition and uses of Gun metal.

Long Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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

May 2015 Describe the composition and uses of nichrome and gun metal.

May 2015 Describe the properties and uses of Gun metal.
Explain caustic embrittlement.

Long Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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May 2019 Write brief note on caustic embrittlement.

Explain stress corrosion.

Long Answer 6 Marks Dec-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?

May 2015 Explain stress corrosion and high temperature corrosion.
What is producer gas?

Short Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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Dec 2018 Give composition and uses of producer gas.

Dec 2018 Give composition and uses of producer gas.

Dec 2017
What is a producer gas? Give its composition and uses.

Dec 2015 Give the composition of producer gas.

Dec 2015 Give the uses of producer gas.
Give the composition of producer gas.

Short Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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Dec 2018 Give composition and uses of producer gas.

Dec 2018 Give composition and uses of producer gas.

Dec 2017
What is a producer gas? Give its composition and uses.

Dec 2015 What is producer gas?

Dec 2015 Give the uses of producer gas.
Give the uses of producer gas.

Short Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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Dec 2018 Give composition and uses of producer gas.

Dec 2018 Give composition and uses of producer gas.

Dec 2017
What is a producer gas? Give its composition and uses.

Dec 2015 What is producer gas?

Dec 2015 Give the composition of producer gas.

Define fire point.

Short Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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Define flash point.

Short Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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Define emulsification.

Short Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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Define viscosity.

Short Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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Define cloud point.

Short Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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Define pour point.

Short Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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What are refractories?

Short Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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May 2019 What are refractories?

May 2019 Give detailed account of three main types of 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 Explain the types of refractories.
Explain the types of refractories.

Long Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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May 2019 What are refractories?

May 2019 Give detailed account of three main types of 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?

Give the preparation of polythene.

Short Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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Give the uses of polythene.

Short Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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Give the preparation of Teflon.

Short Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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Give the uses of Teflon.

Short Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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Explain acid rain.

Long Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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Dec 2016
What is acid rain? What are its harmful effects?

May 2015 What is acid rain?
Explain global warming.

Long Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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May 2020 Explain Global warming.

May 2019 Explain green house effect and 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.
Explain LPG.

Short Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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Dec 2015 Explain CNG.
Explain CNG.

Short Answer 6 Marks Dec-2015 • PSBTE DIPLOMA

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Dec 2015 Explain LPG.

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Answers about this subject, solved papers, and preparation.

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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 Dec-2015 (DIPLOMA 1st-2nd)

Chemistry Dec-2015

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