What is the PMA Long Course?

The PMA Long Course is a 2-year regular training program at the Pakistan Military Academy Kakul to join the Pakistan Army as a commissioned officer (Second Lieutenant).

What are the eligibility criteria for the PMA Long Course?

Candidates must have passed Intermediate (FA/FSc) with at least 55% marks, be unmarried males aged 17 to 22 years, and meet physical standards like a minimum height of 5 ft 4 in.

What topics are included in the PMA Long Course initial test?

The test includes Verbal Intelligence Tests, Non-Verbal Intelligence Tests, and Academic tests covering Islamic Studies, Pakistan Studies, History, General Knowledge, and Current Affairs.

Can I apply for PMA Long Course on a Hope Certificate?

Yes, candidates who passed Intermediate Part-1 with 55% marks and appeared for Part-2 exams can apply with a Hope Certificate signed by the head of their institution.

Welcome to chemistry afns test 3, a targeted online practice module designed specifically for candidates preparing for the Armed Forces Nursing Services (AFNS) initial entry test. This quiz covers essential FSc Chemistry concepts and high-frequency multiple-choice questions to ensure your preparation for the computer-based academic test is thorough, precise, and effective.

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CHEMISTRY TEST 3

Key Topics Covered in Chemistry AFNS Test 3

To achieve top marks in your official AFNS entry exam, make sure to thoroughly revise these foundational chemical domains evaluated in this module:

Chemical Equilibrium & Phase Rule: Reversible reactions, dynamic equilibrium, equilibrium constants ($K_c$ and $K_p$), solubility products, and Le Chatelier’s principle.
Solutions & Colligative Properties: Molarity, molality, mole fraction, Raoult’s law, boiling point elevation, and freezing point depression.
Hydrocarbons & Alkyl Halides: Alkanes, alkenes, alkynes, aromaticity of benzene, nucleophilic substitution ($SN_1$ and $SN_2$), and elimination reactions.
Thermochemistry & Energetics: Enthalpy of reaction, Hess’s law, standard state measurements, and bond energy calculations.

High-Frequency Sample MCQs for Practice

Test your understanding with these representative MCQs frequently featured in competitive entry examinations:

1. Which factor affects the numerical value of the equilibrium constant ($K_c$)?

A) Concentration of reactants

B) Pressure of the system

C) Temperature

D) Addition of a catalyst

Answer: C) Temperature

2. A solution that resists changes in its pH value upon adding small amounts of acid or base is called a:

A) Saturated solution

B) Buffer solution

C) Isotonic solution

D) Standard solution

Answer: B) Buffer solution

3. Benzene undergoes electrophilic substitution reactions primarily because of its high degree of:

A) Instability

B) Unsaturation and resonance stability

C) Volatility

D) Acidity

Answer: B) Unsaturation and resonance stability

4. The elevation in boiling point ($\Delta T_b$) of a solution is directly proportional to its:

A) Molarity

B) Molality

C) Normality

D) Mole fraction of solvent

Answer: B) Molality

5. Which type of nucleophilic substitution reaction ($SN$) follows second-order kinetics and occurs in a single concerted step?

A) $SN_1$

B) $SN_2$

C) $E_1$

D) $E_2$

Answer: B) $SN_2$

6. The heat change accompanying a reaction at constant pressure is called:

A) Internal energy

B) Enthalpy ($\Delta H$)

C) Entropy

D) Free energy

Answer: B) Enthalpy ($\Delta H$)

7. Which compound exhibits geometric (cis-trans) isomerism?

A) 1-Butene

B) 2-Butene

C) Propene

D) Ethene

Answer: B) 2-Butene

Detailed Overview of Test 3 Preparation

Preparing for chemistry afns test 3 requires a structured approach to solving core problem sets and mastering fundamental chemical principles. This practice quiz is aligned with the latest syllabus prescribed by military selection centers to mirror the exact format and difficulty of the computer-based academic exam. By practicing these questions regularly, you will build conceptual clarity, speed up your reaction time per question, and boost your overall exam confidence.

Effective Revision Tips for Test 3

Review FSc Fundamentals: Focus on key definitions, reaction mechanisms, and formulas in your 1st-year and 2nd-year FSc Chemistry textbooks.
Analyze Incorrect Attempts: Inspect every wrong answer after completing the quiz to identify weak areas and resolve lingering doubts.
Timed Practice: Answer each question quickly to build maximum speed and precision under real computer exam conditions.

Useful Resources & Next Steps

Next Quiz: Move forward to practice Chemistry AFNS Test 4.
Main Hub: Access All AFNS Chemistry Practice Quizzes to attempt tests in proper order.
Official Information: For official entry test schedules and registration rules, visit the Join Pak Army Official Website.

Chemistry Academic Test Preparation: Energetics, Equilibrium & Electrochemistry

Thermodynamics, Reaction Kinetics & Electrochemical Cells

Physical chemistry dynamics—covering thermochemistry, chemical equilibrium, rates of reaction, and electrochemical processes—form one of the most scoring yet challenging segments of the Armed Forces entrance exams. These subjects involve both theoretical principles and straightforward numerical problems. Success in Chemistry Quiz 3 relies on your capability to interpret reaction behavior, equilibrium shifts, oxidation-reduction numbers, and energy transformations.

Key Objective:

Ensure you can assign oxidation states instantly, predict Le Chatelier’s equilibrium responses, and distinguish between electrolytic and galvanic cell operations.

Essential Topics Tested in Quiz 3

1. Thermochemistry & Energetics

Master enthalpy changes ($\Delta H$), exothermic vs endothermic reactions, Hess’s Law of Constant Heat Summation, lattice energy, and standard enthalpy of formation/combustion. Practice state function concept identification.

2. Chemical Equilibrium & Le Chatelier’s Principle

Understand law of mass action, expressions for $K_p$, $K_c$, $K_a$, $K_b$, and solubility product ($K_{sp}$). Know how temperature, pressure, volume, and concentration shifts affect reaction equilibrium position according to Le Chatelier’s Principle.

3. Reaction Kinetics & Catalysis

Differentiate between order of reaction and molecularity. Learn activation energy concepts, Arrhenius equation principles, collision theory, and how catalysts lower the activation energy barrier without shifting equilibrium.

4. Electrochemistry & Redox Reactions

Study oxidation numbers, balancing redox equations via ion-electron method, Standard Hydrogen Electrode (SHE), electrochemical series, standard electrode potentials ($E^\circ$), and commercial batteries/fuel cells.

Quick Reference Sheet

Concept	Key Formula / Rule
Equilibrium Constant ($K_c$)	$K_c = \frac{[\text{Products}]^n}{[\text{Reactants}]^m}$ (Solids and pure liquids excluded)
pH and pOH	$\text{pH} = -\log[H^+]$, $\text{pH} + \text{pOH} = 14$
Cell EMF ($E^\circ_{\text{cell}}$)	$E^\circ_{\text{cell}} = E^\circ_{\text{reduction (cathode)}} – E^\circ_{\text{reduction (anode)}}$

Proceed to the quiz below to evaluate your speed and conceptual understanding. Take note of any calculation shortcuts you can practice before test day!

Results

#1. Q.69 Reaction of Grignard’s reagent with formaldehyde gives:

#2. Q.70 Which is not mild oxidizing agent?

#3. Q.71 Condensation of Aldehydes with alpha-hydrogen gives:

#4. Q.72 Butyraldehyde has formula of:

#5. Q.73 Acetaldehyde and methyl ketones react with halogens in the presence of NaOH gives product:

#6. Q.74 Addition of mineral acid slowly to aqueous solution of sodium cyanide produces:

#7. Q.75 The cyanogroup -C#N is hydrolysed to the product:

#8. Q.76 Dry distillation of calcium acetate results in the formation of:

#9. Q.77 From formaldehyde we get formalin which is powerful:

#10. Q.83 Which of these conditions is mismatched?

#11. Q.84 A compound X has all of the properties below. It is a liquid at 25 C it mixes completely with water it reacts with aqueous sodium hydroxide. What could X be?

#12. Q.85 Reaction of acetic acid with LiAlH4 gives:

#13. Q.86 Which of the following has the lowest solubility in water:

#14. Q.87 An acid that exists as a cyclic dimer in benzene and shows a molar mass of 120g/mol is:

#15. Q.88 The weakest oxidizing agent that can be used in the reaction CH3CHO + [O] -> CH3COOH is:

#16. Q.89 The O-H bond breaks in carboxylic acid when product is:

#17. Q.93 CH3CN + HCl -> A + B (in the presence of water). In the above reaction, A and B are:

#18. Q.94 In esterification, the OH group of carboxylic acid departs as?

#19. Q.95 Lowest boiling point is shown by:

#20. Q.96 To prepare ethyl alcohol, the ester that can be hydrolysed is?

#21. Q.97 Propanone on oxidation gives:

#22. Q.98 Primary structure of proteins refers to:

#23. Q.99 Third order of protein structure refers to:

#24. Q.100 Second order of protein structure refers to:

#25. Q.101 Albumins and globulins are defined as:

#26. Q.102 In proteins, the alpha-helix and Beta-pleated sheet are examples of:

#27. Q.103 The most abundant protein in the human body is:

#28. Q.104 Enzymes have been mainly classified on the basis of:

#29. Q.105 Dehydrogenase is an example of:

#30. Q.106 The enzymes that bring about exchange of functional groups like phosphate are called:

#31. Q.107 Collagen is a fibrous protein present most abundantly in:

#32. Q.108 The specific substance (metabolite) that fits on the enzyme surface and is converted to products is called:

#33. Q.109 Which of the following chlorosubstituted acid has greater strength of acid:

#34. Q.110 Which of the following is correct order with respect to acid strength?

#35. Q.111 In the conversion of wine to vinegar:

#36. Q.112 Ethanoic acid undergoes partial reduction with LiAlH4 to give:

#37. Q.113 Which of the following halo-substituted carboxylic acid is the strongest acid:

#38. Q.115 A fibre which is made from acrylonitrile as monomer:

❌ Your Wrong Attempts: