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 chemical formula of ferric sulphate is ___________.

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

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May 2018
SECTION-A

Q1. Do as directed.

a. The chemical formula of ferric sulphate is _________.
A chemical equation in which heat is absorbed is called ____________ reaction.

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

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May 2019 A chemical reaction in which heat is absorbed is known as ______ reaction.

May 2018
A chemical equation in which heat is evolved is called_____________.
Proton was discovered by ___________.

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

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May 2018
Proton was discovered by _____
Number of orbitals in d subshell is __________.

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

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Water is a ___________ solvent.

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

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May 2018
Water is a ……………… solvent.
Permanent hardness of water is due to sulphate and chlorides of__________.

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

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The substance which shows the end point during titration is called_________.

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

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Degree of ionization__________ with dilution.

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

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Reduction involves_________ of electron.

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

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May 2019 As per electronic concept reduction is ______ of electrons.

Dec 2016
Reduction involves ___________ of electrons.
Reaction in which oxidation and reduction take place___________ is called ________ reaction.

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

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Dec 2011 The reactions in which oxidation and reduction go side by side are called
An electrolyte allows electricity to pass through it when in fused state.

True / False 1 Marks May-2015 • PSBTE DIPLOMA

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A solution whose pH value is 10 is acidic.

True / False 1 Marks May-2015 • PSBTE DIPLOMA

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Sterilization of water is generally done by chlorination.

True / False 1 Marks May-2015 • PSBTE DIPLOMA

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The two electrons that occupy a bonding orbital must have opposite spins.

True / False 1 Marks May-2015 • PSBTE DIPLOMA

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Valency is the donating capacity of an element.

True / False 1 Marks May-2015 • PSBTE DIPLOMA

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Calculate the number of atoms and gram atoms in 2.3 gm of sodium.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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May 2016
Calculate the number of atoms in 23gm of Na ? (at.mass of Na=23)

Dec 2011 Calculate the number of atoms in 0.23 gms of Na (at mass of Na = 23).

Dec 2011 Calculate the number of atoms in 0.23g of Na (at mass of Na = 23).

Explain thermochemical equations.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Differentiate between compound and mixture.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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May 2019
Differentiate between compound and mixture?
State Pauli’s Exclusion Principle.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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State Aufbau Principle.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Differentiate between temporary and permanent hardness of water.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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May 2019
Differentiate between temporary and permanent hardness of water.

May 2018
Differentiate between temporary and permanent hardness of water.

May 2017
Differentiate between temporary and permanent hardness of water.
What are anion exchange resins?

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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State Le- Chatelier’s principle.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Dec 2016
State Le-Chatelier’s principle.
What are spontaneous and non spontaneous processes? Give one example of each.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Define acid according to Lewis concept.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Define base according to Lewis concept.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Differentiate between Direct and Indirect redox reactions.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Dec 2017
Give the difference between direct and in-direct redox reactions.

Dec 2015 What is direct and indirect redox reaction?
Explain electroplating by giving examples.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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May 2019
Explain the process of electroplating?

Dec 2015 Explain the process of electroplating.

Dec 2011 Write in brief about electroplating.

State and explain Faraday’s 1st law of electrolysis.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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May 2019 Explain Faraday’s second law of electrolysis.

May 2018
Explain Faraday’s second law of electrolysis.

May 2017
Explain Faraday’s second law of electrolysis.

Dec 2011 Define and explain Faradays laws of electrolysis.

Dec 2011 Define and explain the process of electrolysis.

Dec 2011 (a) Define and explain the process of electrolysis.
How would you account for tetra covalency of carbon?

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Give the main features of Bohr’s model of atom.

Long Answer 5 Marks May-2015 • PSBTE DIPLOMA

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Dec 2016
What are the successes of Bohr’s model of atom?

Dec 2015 What are the successes of Bohr’s model of atom?

Dec 2011 Give the main features of Bohr’s atomic model.
An electron is in 3d orbital. What possible values of quantum numbers n, l, m and s can it have?

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Differentiate between sigma and pi bond.

Short Answer 2 Marks May-2015 • PSBTE DIPLOMA

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May 2020 Differentiate between sigma (σ) and pi (π) bond.

May 2019 Differentiate between sigma bond and pi bond.

Dec 2016
Differentiate between sigma (σ) and pi (π) bond.
Name the different blocks of element in the long form of periodic table. Give the general electronic configuration of each block.

Long Answer 5 Marks May-2015 • PSBTE DIPLOMA

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Dec 2011 Name the different blocks in the periodic table. Give the general electronic configuration of each.
Define Hybridisation. Explain sp3 Hybridisation.

Long Answer 5 Marks May-2015 • PSBTE DIPLOMA

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Dec 2015 Explain SP, SP2, SP3 hybridization.
Write chemical formulas of following compounds: Ethanol, Acetic acid, Acetone, Acetaldehyde, Acetylene, Ethane, Formaldehyde.

Short Answer 7 Marks May-2015 • PSBTE DIPLOMA

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May 2019
a) Write the formula of the following compound.
\r\n\r\n
i)Acetic acid ii)Acetaldehyde iii)Acetone iv)Ethene v)Ethyne

Explain the concept of homologous series.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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May 2020 Define Homologous series?
Explain working of Dry cell.

Long Answer 5 Marks May-2015 • PSBTE DIPLOMA

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Dec 2016
Explain the working of a dry cell.

Dec 2015 Explain the working of dry cell.
Calculate the number of molecules in 112 ml of N2 at N.T.P.

Short Answer 3 Marks May-2015 • PSBTE DIPLOMA

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Define molarity.

Short Answer 2 Marks May-2015 • PSBTE DIPLOMA

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Define buffer action.

Short Answer 5 Marks May-2015 • PSBTE DIPLOMA

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Discuss the buffer action of acidic buffer.

Long Answer 5 Marks May-2015 • PSBTE DIPLOMA

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How will you explain the formation of scales and sludge?

Long Answer 5 Marks May-2015 • PSBTE DIPLOMA

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May 2019
Explain scale and sludge formation.

May 2018
Explain scale and sludge formation.

May 2017
Explain scale and sludge formation.

Dec 2015 Explain scale and sludge formation.
Describe the measure to prevent formation of scales and sludge.

Long Answer 5 Marks May-2015 • PSBTE DIPLOMA

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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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