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

Sulphide ores are concentrated by _________.

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

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May 2019 Sulphide ores are concentrated by ____________ process.

May 2019 Sulphide ores are concentrated by _______process.

May 2016
Sulphide ores are concentrated by ______________process.
Chromizing is the process of depositing ____________ on iron by cementation.

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

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May 2019 Chromising is the process of depositing _______ on iron.
__________ number is used for rating diesel.

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

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Dec 2015 ___________ number is used for rating diesel.
Producer gas is a mixture of _________ and ___________.

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

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Dec 2018 Producer gas is a mixture of CO and _______.

Dec 2018 Producer gas is a mixture of CO and _______

May 2017
Producer gas is a mixture of ______.

May 2016
Producer gas is a mixture of CO & _____________.

Dec 2016
Producer gas is mixture of ............ and .................... .

Suspension of graphite in water is called ___________.

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

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May 2019 Suspension of graphite in water is called _______.

Dec 2011 Suspension of graphite in water is called as ________
A good refractories should have __________ porosity.

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

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May 2019 A good refractory material should have ______ porosity.
A pigment Vanish is called _________.

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

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The monomer of PVC is _________.

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

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Dec 2018 The monomer unit of PVC is _______.

Dec 2018 The monomer unit of PVC is _______

May 2017
The monomer of polyvinylchloride is ______.

Dec 2017
The monomer of PVC is _________.

The pure metals are _________ corroded.

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

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The 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 Unit of heat is _________.
Galvanised sheets of iron are coated with zinc.

True / False 1 Marks May-2015 • PSBTE DIPLOMA

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May 2015 Galvanised sheets of iron are coated with tin.
Purity of metal increases corrosion.

True / False 1 Marks May-2015 • PSBTE DIPLOMA

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A good fuel has higher moisture content.

True / False 1 Marks May-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.

Dec 2015 A good fuel has low moisture content.
All macro molecules are polymers.

True / False 1 Marks May-2015 • PSBTE DIPLOMA

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Dec 2015 All macromolecules are polymers.
All ores are minerals.

True / False 1 Marks May-2015 • PSBTE DIPLOMA

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May 2018
All ores are minerals.
Explain calcination.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Explain roasting.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Describe the properties and uses of German Silver.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Describe the properties and uses of Gun metal.

Short Answer 3 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 composition and uses of nichrome and gun metal.

Dec 2015 Describe the composition and uses of Gun metal.
What is water gas?

Short Answer 3 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 a water gas? Give its composition and uses.

May 2015 Give the composition and uses of water gas.

Give the composition and uses of water gas.

Short Answer 3 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 a water gas? Give its composition and uses.

May 2015 What is water gas?
What is an enamel?

Short Answer 3 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 Define enamel. Give its composition and uses.

May 2015 Write the constituents of enamel.

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

Short Answer 3 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 Define enamel. Give its composition and uses.

May 2015 What is an enamel?

Dec 2011 What is an enamel? Write constituents and applications of enamels.
What are the characteristics of good refractory material?

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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May 2021 What is a refractory material?

May 2018
What are the main characteristics of a good refractory?

Dec 2018 What are the characteristics of a good refractory material?

Dec 2018 What are the characteristics of a good refractory material?

May 2017
What are the characteristics of a good refractory material?

May 2016
What are refractories? Give characteristics of a good refractory material.

Differentiate between thermoplastics and thermosetting plastics with example.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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May 2019 Distinguish between thermoplastics and thermosetting plastics.

May 2019 Differentiate 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?

Dec 2011 Differentiate between thermoplastics and thermosetting plastics.
Name the various constituents of paint.

Short Answer 3 Marks May-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.

Dec 2015 Name various constituents of paint.
Explain the function of drying oil.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Dec 2015 Explain the functions of a drying oil and thinner.
Explain vulcanization of rubber.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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May 2019 What is vulcanization of rubber?

May 2019 Define vulcanization of rubber.

What is Buna-S?

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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May 2020 What is Buna-s? What are its uses?
Name the monomer used in the preparation of Buna-S.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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What is acid rain?

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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

Dec 2015 Explain acid rain.
Explain its harmful effect.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Explain greenhouse effect.

Short Answer 3 Marks May-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 global warming.

Dec 2015 Explain global warming.
Explain global warming.

Short Answer 3 Marks May-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.

Dec 2015 Explain global warming.
What is the difference between cast iron, wrought iron and steel?

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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May 2017
What is the difference between cast iron, wrought iron and steel?
What are anti-knocking compounds?

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Dec 2018 What are anti knock compounds?

Dec 2018 Give two examples of anti knock compounds.

Dec 2018 What are anti knock compounds? Give two examples.

May 2015 Give two examples of anti-knocking compounds.

Give two examples of anti-knocking compounds.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Dec 2018 What are anti knock compounds?

Dec 2018 Give two examples of anti knock compounds.

Dec 2018 What are anti knock compounds? Give two examples.

May 2015 What are anti-knocking compounds?
What are theories of corrosion?

Long Answer 10 Marks May-2015 • PSBTE DIPLOMA

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Dec 2016
What are the theories of corrosion? Describe briefly the acid theory?
Explain the rusting of iron with the help of electrochemical theory of corrosion.

Long Answer 10 Marks May-2015 • PSBTE DIPLOMA

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May 2020 What is corrosion? Explain the mechanism rusting of iron by electrochemical corrosion in detail.

Dec 2011 Explain rusting of iron using electro-chemical theory (when cathodic area > anodic area).
What are fuels?

Long Answer 10 Marks May-2015 • PSBTE DIPLOMA

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May 2016
Describe classification of fuel.

May 2015 Define fuels. How are they classified?

Explain calorific value of fuel.

Long Answer 10 Marks May-2015 • PSBTE DIPLOMA

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May 2021 Define calorific value of a fuel? What are the units of calorific value?

May 2019 What is calorific value of a fuel? Name the apparatus used to measure calorific value.

Dec 2018 Define calorific value of a fuel.
Explain advantages of gaseous fuel over solid fuels.

Long Answer 10 Marks May-2015 • PSBTE DIPLOMA

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May 2021 What are the advantages of gaseous fuels over solid and liquid fuels?

May 2019 What are fuels? What are the advantages of gaseous fuels?

May 2018
What are the advantages of gaseous fuels?

Dec 2018 What are the advantages of gaseous fuels?

Dec 2018 What are the advantages of gaseous fuels?
What are lubricants?

Long Answer 10 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 the characteristics of a good lubricant?

Dec 2015 What are the functions of lubricants?
Explain flash and fire points as applied to lubricants.

Short Answer 4 Marks May-2015 • 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.

May 2019 What is fire point and flash point of a lubricant?

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.

Explain cloud and pour points as applied to lubricants.

Short Answer 4 Marks May-2015 • PSBTE DIPLOMA

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What are composite materials?

Long Answer 10 Marks May-2015 • PSBTE DIPLOMA

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May 2021
What are composite materials? Give one example.

Dec 2018 What are composite materials?

Dec 2018 Give an example of a composite material.

Dec 2018 What are composite materials? Give an example.

May 2015 What are the advantageous characteristics of composites?
Give example of natural composite.

Long Answer 10 Marks May-2015 • PSBTE DIPLOMA

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What are the advantageous characteristics of composites?

Long Answer 10 Marks May-2015 • PSBTE DIPLOMA

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May 2021
What are composite materials? Give one example.

Dec 2018 What are composite materials?

Dec 2018 Give an example of a composite material.

Dec 2018 What are composite materials? Give an example.

May 2015 What are composite materials?

What is meant by the term passivation?

Long Answer 10 Marks May-2015 • PSBTE DIPLOMA

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Explain prevention by material selection and design.

Long Answer 10 Marks May-2015 • PSBTE DIPLOMA

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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 May-2015 (DIPLOMA 1st-2nd)

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