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.
Results
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#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:
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CHEMISTRY TEST 3
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.
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.