Solved question paper for CHEM Dec-2011 (DIPLOMA 1st-2nd)

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Chemistry Dec-2011

PSBTE • DIPLOMA • Information Technology • 1st-2nd • Dec-2011

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.

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Solved Questions

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Dimensional formula of density is ________

Fill in the Blanks 1 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2015 Dimensional formula of Density is _____________.

Dec 2011 Dimensional formula of density is ___________.
Negatively charged ions are called ______

Fill in the Blanks 1 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2017
Negatively charged ions are called __________

May 2016
Positively charged ions are called………………….

May 2016
Negatively charged ion are called …………………

Dec 2016
Positively charged ions are called ____________.
One mole of particles means _______ particles.

Fill in the Blanks 1 Marks Dec-2011 • PSBTE DIPLOMA

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The shape of p-orbital is like ________

Fill in the Blanks 1 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2016
The shape of p-orbital is dumb-bell.

Dec 2015 The shape of p-orbital is like ___________.

Bond length is measured in ________ unit.

Fill in the Blanks 1 Marks Dec-2011 • PSBTE DIPLOMA

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May 2016
Bond length is measured in …………………. Unit
A base is a proton ________

Fill in the Blanks 1 Marks Dec-2011 • PSBTE DIPLOMA

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May 2017
A base is a proton_____________
Oxidation involves ________ of electrons by atoms or ions.

Fill in the Blanks 1 Marks Dec-2011 • PSBTE DIPLOMA

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The functional group of aldehydes is ________

Fill in the Blanks 1 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2015 The functional group of aldehyde is _____________.

Every inorganic compound is made up of two radicals.

True / False 1 Marks Dec-2011 • PSBTE DIPLOMA

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Isotopes have same number of protons.

True / False 1 Marks Dec-2011 • PSBTE DIPLOMA

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May 2019
Isotopes have same number of protons (T/F)

May 2016
Isotopes have same number of protons.
Electronic energy is negative because electron has negative charge.

True / False 1 Marks Dec-2011 • PSBTE DIPLOMA

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An element with atomic numbers a belongs to p-block.

True / False 1 Marks Dec-2011 • PSBTE DIPLOMA

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Molecule of methane (CH4) is tetrahedral.

True / False 1 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2011 Molecule of methane (CH₄) is tetrahedral
NH4OH is a strong electrolyte.

True / False 1 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2011 NH₄OH is a strong electrolyte.
Chlorine molecule is formed by ionic linkage.

True / False 1 Marks Dec-2011 • PSBTE DIPLOMA

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Write the significance of a chemical equation with an example.

Long Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

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May 2019 What are the essentials of a chemical equation?

May 2016
What are the essentials of chemical equation?

Dec 2015 What information is conveyed by a chemical equation?

Dec 2011 What are the essentials of a chemical equation?

Dec 2011 What are the implications of a chemical equation?

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

Long Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

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

May 2015 Calculate the number of atoms and gram atoms in 2.3 gm of sodium.

Dec 2011 Calculate the number of atoms in 0.23g of Na (at mass of Na = 23).
Differentiate between S and P orbitals.

Long Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

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May 2019
Differentiate between 1s and 2s orbital.
Explain line spectrum of hydrogen.

Long Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

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Define covalent bonding with at least two examples.

Long Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

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May 2019
a) Define covalent bond. Explain it taking at least 2 examples?

May 2017
Define covalent bonding with examples.

Dec 2015 Explain covalent bond with examples.

What are the disadvantages of using hard water in laundary work, paper and textile industry?

Long Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2011 What are the disadvantages of using hard water in laundry work, paper and textile Industry?
Explain open and closed systems.

Long Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2015 Explain open, closed and isolated system.
Define ionization and degree of ionization.

Long Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2011 Explain in brief degree of ionization.
A current of 2 amp on passing through a solution of AgNO3 for 100 seconds deposited 2.22 g of Ag. Calculate electrochemical equivalent of Ag.

Long Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2011 A current of 2 amp on passing through a soln of AgNO₃ for 100 secs, deposited 2.22 gms of Ag. Calculate electrochemical equivalent of Ag.

Define catenation and functional group.

Long Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

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What is the difference between an atom and an ion?

Long Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

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Explain the defects in the long form of the periodic table.

Long Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

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What are the various factors favoring formation of ionic bond?

Long Answer 5 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2016
What are the factors which favour the formation of an ionic bond?

Dec 2015 Define ionic bond. What are the factors favouring the formation of ionic bond?

Dec 2011 (a) What are the various factors favoring formation of ionic bond?

Balance the following equation by hit and trial method: KClO3 → KCl + O2

Long Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2011 (b) Balance the following equation by hit and trial method: KClO₃ → KCl + O₂
How many protons and neutrons are there in the nucleus of 17/8 O?

Short Answer 2 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2011 (c) How many protons and neutrons are there in the nuclei of ¹⁷₈O?
A sample of hard water is found to contain 272 mg of CaSO4 per litre. What will be its hardness in ppm? (Ca = 40, S = 32, O = 16, C = 12)

Long Answer 5 Marks Dec-2011 • PSBTE DIPLOMA

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May 2019 A sample of hard water is found to contain 204 mg of CaSO4 per litre of the solution. What will be the hardness in ppm? Given atomic mass of Ca = 40, S = 32, O = 16 and C = 12.

Dec 2016
A sample of hard water is found to contain 204 mg of CaSO4/L. What will be its hardness in ppm?

Dec 2011 (a) A sample of hard water is found to contain 272 mg of CaSO₄ per litre. What will be its hardness in ppm? (Ca = 40, S = 32, O = 16)
Explain industrial application of pH.

Long Answer 5 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2011 (b) Explain industrial application of pH.

Define and explain the process of electrolysis.

Long Answer 5 Marks Dec-2011 • 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.

May 2015 State and explain Faraday’s 1st law of electrolysis.

Dec 2011 Define and explain Faradays laws of electrolysis.

Dec 2011 (a) Define and explain the process of electrolysis.
Differentiate between saturated and unsaturated hydrocarbons, giving two examples of each.

Long Answer 5 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2011 (b) Differentiate between saturated and unsaturated hydrocarbons, giving two examples of each.
Write IUPAC names of the following compounds: CH3–CH(OH)–CH3; CH3–CH(COOH)–CH2–CH2–CH3; CH3–CH2–CH2–CH2–CH(NO2)–CH3; CH3–CH(CH3)–CH(CH3)–CH3

Long Answer 6 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2011 (a) Write IUPAC names of the following compounds:\nCH₃–CH–CH₃\n |\n OH\n\nCH₃–CH–CH₂–CH₂–CH₃\n |\n COOH\n\nCH₃–CH₂–CH₂–CH₂–CH–CH₃\n |\n NO₂\n\nCH₃–CH–CH–CH₃\n | |\n CH₃ CH₃
Write the characteristics of chemical equilibrium and explain the types of chemical equilibrium.

Long Answer 4 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2011 (b) Write the characteristics of chemical equilibrium and explain the types of chemical equilibrium.

Define co-ordinate or dative bond, explain with examples of NH4+ and NH3BF4 molecules.

Long Answer 5 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2011 (a) Define co-ordinate or dative bond, explain with examples of NH₄⁺ and NH₃·BF₃ molecules.
Calculate the pH value of 0.01 M HCl solution.

Short Answer 5 Marks Dec-2011 • PSBTE DIPLOMA

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May 2017
Calculate the pH value of 0.001 M HCL.

Dec 2015 Calculate the pH value of 0.001 M HCL.

Dec 2011 (b) Calculate the pH value of 0.01 M HCl soln.
Molecule of methane (CH₄) is tetrahedral

True / False 1 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2011 Molecule of methane (CH4) is tetrahedral.
NH₄OH is a strong electrolyte.

True / False 1 Marks Dec-2011 • PSBTE DIPLOMA

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Dec 2011 NH4OH is a strong electrolyte.

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

Short Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

Existing answers are stored as HTML; you can edit directly without converting to Markdown.
May 2016
Calculate the number of atoms in 23gm of Na ? (at.mass of Na=23)

May 2015 Calculate the number of atoms and gram atoms in 2.3 gm of sodium.

Dec 2011 Calculate the number of atoms in 0.23 gms of Na (at mass of Na = 23).
What are the disadvantages of using hard water in laundry work, paper and textile Industry?

Short Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

Existing answers are stored as HTML; you can edit directly without converting to Markdown.
Dec 2011 What are the disadvantages of using hard water in laundary work, paper and textile industry?
A current of 2 amp on passing through a soln of AgNO₃ for 100 secs, deposited 2.22 gms of Ag. Calculate electrochemical equivalent of Ag.

Short Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

Existing answers are stored as HTML; you can edit directly without converting to Markdown.
Dec 2011 A current of 2 amp on passing through a solution of AgNO3 for 100 seconds deposited 2.22 g of Ag. Calculate electrochemical equivalent of Ag.
(a) What are the various factors favoring formation of ionic bond?

Short Answer 5 Marks Dec-2011 • PSBTE DIPLOMA

Existing answers are stored as HTML; you can edit directly without converting to Markdown.
Dec 2016
What are the factors which favour the formation of an ionic bond?

Dec 2015 Define ionic bond. What are the factors favouring the formation of ionic bond?

Dec 2011 What are the various factors favoring formation of ionic bond?

(b) Balance the following equation by hit and trial method: KClO₃ → KCl + O₂

Short Answer 3 Marks Dec-2011 • PSBTE DIPLOMA

Existing answers are stored as HTML; you can edit directly without converting to Markdown.
Dec 2011 Balance the following equation by hit and trial method: KClO3 → KCl + O2
(c) How many protons and neutrons are there in the nuclei of ¹⁷₈O?

Short Answer 2 Marks Dec-2011 • PSBTE DIPLOMA

Existing answers are stored as HTML; you can edit directly without converting to Markdown.
Dec 2011 How many protons and neutrons are there in the nucleus of 17/8 O?
(a) A sample of hard water is found to contain 272 mg of CaSO₄ per litre. What will be its hardness in ppm? (Ca = 40, S = 32, O = 16)

Short Answer 5 Marks Dec-2011 • PSBTE DIPLOMA

Existing answers are stored as HTML; you can edit directly without converting to Markdown.
May 2019 A sample of hard water is found to contain 204 mg of CaSO4 per litre of the solution. What will be the hardness in ppm? Given atomic mass of Ca = 40, S = 32, O = 16 and C = 12.

Dec 2016
A sample of hard water is found to contain 204 mg of CaSO4/L. What will be its hardness in ppm?

Dec 2011 A sample of hard water is found to contain 272 mg of CaSO4 per litre. What will be its hardness in ppm? (Ca = 40, S = 32, O = 16, C = 12)
(b) Explain industrial application of pH.

Short Answer 5 Marks Dec-2011 • PSBTE DIPLOMA

Existing answers are stored as HTML; you can edit directly without converting to Markdown.
Dec 2011 Explain industrial application of pH.

(a) Define and explain the process of electrolysis.

Short Answer 5 Marks Dec-2011 • PSBTE DIPLOMA

Existing answers are stored as HTML; you can edit directly without converting to Markdown.
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.

May 2015 State and explain Faraday’s 1st law of electrolysis.

Dec 2011 Define and explain Faradays laws of electrolysis.

Dec 2011 Define and explain the process of electrolysis.
(b) Differentiate between saturated and unsaturated hydrocarbons, giving two examples of each.

Short Answer 5 Marks Dec-2011 • PSBTE DIPLOMA

Existing answers are stored as HTML; you can edit directly without converting to Markdown.
Dec 2011 Differentiate between saturated and unsaturated hydrocarbons, giving two examples of each.
(a) Write IUPAC names of the following compounds:
CH₃–CH–CH₃
|
OH

CH₃–CH–CH₂–CH₂–CH₃
|
COOH

CH₃–CH₂–CH₂–CH₂–CH–CH₃
|
NO₂

CH₃–CH–CH–CH₃
| |
CH₃ CH₃

Short Answer 6 Marks Dec-2011 • PSBTE DIPLOMA

Existing answers are stored as HTML; you can edit directly without converting to Markdown.
Dec 2011 Write IUPAC names of the following compounds: CH3–CH(OH)–CH3; CH3–CH(COOH)–CH2–CH2–CH3; CH3–CH2–CH2–CH2–CH(NO2)–CH3; CH3–CH(CH3)–CH(CH3)–CH3
(b) Write the characteristics of chemical equilibrium and explain the types of chemical equilibrium.

Short Answer 4 Marks Dec-2011 • PSBTE DIPLOMA

Existing answers are stored as HTML; you can edit directly without converting to Markdown.
Dec 2011 Write the characteristics of chemical equilibrium and explain the types of chemical equilibrium.

(a) Define co-ordinate or dative bond, explain with examples of NH₄⁺ and NH₃·BF₃ molecules.

Short Answer 5 Marks Dec-2011 • PSBTE DIPLOMA

Existing answers are stored as HTML; you can edit directly without converting to Markdown.
Dec 2011 Define co-ordinate or dative bond, explain with examples of NH4+ and NH3BF4 molecules.
(b) Calculate the pH value of 0.01 M HCl soln.

Short Answer 5 Marks Dec-2011 • PSBTE DIPLOMA

Existing answers are stored as HTML; you can edit directly without converting to Markdown.
May 2017
Calculate the pH value of 0.001 M HCL.

Dec 2015 Calculate the pH value of 0.001 M HCL.

Dec 2011 Calculate the pH value of 0.01 M HCl solution.

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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-2011 (DIPLOMA 1st-2nd)

Chemistry Dec-2011

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