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University of Barishal

Department of Computer Science and Engineering

Final Exam

Course Title: Chemistry (CHEM-1107)

Semester: 1st | Session: 23-24

Time: 180 minutes | Marks: 60.00

Course Teacher: Mahmudul Hassan Suhag

Exam Date: May 8, 2025

View 49 Topic-wise Questions for this Course

N.B.: Answer any FIVE questions out of the following. All parts of each question must be answered consecutively. The right side of the question shows the maximum marks.

1.

a)

Briefly discuss the Rutherford's alpha particle scattering experiment.

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4 Marks
b)

State the Bohr atomic model. What are the limitations of Bohr atomic model?

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5 Marks
c)

If the principal quantum number (n) of an atomic orbital is 4, what are possible values of subsidiary quantum number (l) and magnetic quantum number (m)?

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3 Marks
2.

a)

Scandium is a d block element, but not a transition metal- explain why?

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2.50 Marks
b)

Write down the electronic configuration and predict the position (group no. and period no.) in periodic table of following elements: S (16), K (19) and Zn (30).

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3 Marks
c) Why ionization potential energy of Nitrogen is higher than that of Oxygen? Explain.

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2.50 Marks
d)

Write short notes on the following topics:

i) Pauli Exclusion Principle and ii) Diagonal relationships

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4 Marks
3.

a)

Write down the difference between sigma bond and pi bond.

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3 Marks
b)

What do you mean by hybridization of atomic orbitals? Briefly discuss the hybridization of Be, B, and C in of BeCl2, BF3, and CH4, respectively.

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5 Marks
c)

Write down the conditions for the formation of coordination bonds.

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2 Marks
d)

Write a short note on "hydrogen bond".

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2 Marks
4.

a)

Define the solution. Classify the solutions with examples based on physical state of solute and solvent.

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3.50 Marks
b)

What is the molarity of solution prepared by dissolving 25 g of NaOH in 750 mL of solution?

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2 Marks
c)

What is the percent by weight of NaCl, if 1.50 g of NaCl is dissolved in 5.80 g of water?

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1.50 Marks
d)

Define colligative properties. Mention the name of colligative properties of dilute solutions.

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2.50 Marks
e)

Explain the Raoult's law.

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2.50 Marks
5.

a)

State and explain the Phase rule. Calculate the number of phases, components and degrees of freedom for the following systems.

    i) CaCO3 (s) ⇔ CaO (s) + CO2 (g)

    ii) Saturated solution of NaCl

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4 Marks
b)

Define colligative properties. Why is the elevation of boiling colligative property?

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4 Marks
c)

'The vapor pressure of a solution is directly proportional to the mole fraction of the solvent'. Justify the statement from Raoult's law of vapor pressure.

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4 Marks
6.

a)

Establish the relation between Kp and Kc.

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2 Marks
b)

What is Le Chatelier's principle? Explain with the help of Le Chatelier's principle, the effect of temperature and pressure on the following reaction:

N₂(g)+3H2(g) ⇔ 2NH3 (g); ∆H = -92.2 KJ

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3 Marks
c)

Show that, "In zero order reaction, the rate constant is equal to the rate of reaction at all concentrations".

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2 Marks
d)

Write down the integrated rate equations of first order and second order reactions. Show that, "Half-life of a first order reaction is independent on initial concentration of reactant".

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5 Marks
7.

a)

Briefly explain the electrolysis of hydrochloric acid.

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3.50 Marks
b)

What is the fundamental difference between an electrolytic cell and an electrochemical cell.

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2 Marks
c)

In the following reaction, label each species as an acid or bases. Show the conjugate acid-base pairs.

(i) HCO3-(aq) + HF(aq) ⇔ H2CO3(aq) + F-(aq)

(ii) NH3(aq) + H2S(aq) ⇔ NH₄⁺aq) + HS-(aq)

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1.50 Marks
d)

Calculate the pH of following aqueous solution:

(i) 0.01 M HCl, (ii) 0.02 M H2SO4, and (iii) 0.02 M NaOH.

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3 Marks
e)

Calculate the E°cell of the following:

Zn (s) / Zn2+ || Ag / Ag(s)

        Given that, E°Zn/Zn2+ = +0.76 V and E°Ag/Ag+ = -0.799 V

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2 Marks
8.

a)

State and explain Markovnikov and anti-Markovnikov rules.

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3 Marks
b)

Write short notes on:

    i) Sulphonation of Benzene

    ii) Wurtz reaction

    iii)Aldol condensation reaction

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9 Marks
View 49 Topic-wise Questions for this Course

Contributors of this Question:

Role Name Date
Prepared By (Teacher): Mahmudul Hassan Suhag May 8, 2025
Uploaded By: Mahimalam Sabir May 8, 2025, 10:38 p.m.
Converted By (Img/PDF to Text): Baishakhi Bir Dec. 28, 2025, 11:52 p.m.
Reviewed By: Obaydul Hasan Nayeem Dec. 29, 2025, 10:41 a.m.
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