Welcome to chemistry afns test 7, a comprehensive practice module specifically designed for candidates preparing for the Armed Forces Nursing Services (AFNS) initial entry test. This quiz covers key FSc Chemistry topics and high-frequency multiple-choice questions to boost your performance on exam day.
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#1. The maximum number of electrons in a sub-shell with l = 3 is:
#2. Radius of the third shell of H-atom is:
#3. Colour of fluorescence produced by cathode rays depends upon:
#4. A fast moving neutron can eject from nitrogen:
#5. Pressure in gas discharge tube was kept:
#6. Angle of deflection of cathode rays in electric field was studied by:
#7. Positive rays give flash on:
#8. Free neutron change into proton with the emission of:
#9. The value of e/m ratio of electron is —————— C-kg⁻¹:
#10. Charge of electron was measured by:
#11. Angular momentum of an electron:
#12. Plank’s equation is:
#13. Millikan used —————— in his atomizer:
#14. When electron de-excite back into orbit 1, then series obtained is:
#15. The wave number of the light emitted by a certain source is 2 × 10⁶ m⁻¹. The wavelength of this light will be:
#16. Quantum number values for 2p orbitals are:
#17. When 6d orbital is complete, entering electron goes into:
#18. The e/m value for the positive rays is maximum for:
#19. The radius of first orbit of hydrogen atom is:
#20. Total number of d-electrons in an atom of atomic number 26 is:
#21. Which of the following orbital is not possible:
#22. Spin quantum number was given by:
#23. X-rays have same nature as:
#24. The value of Rhdberg constant is:
#25. Balmer series lie in:
#26. Which one of the following orbital will be first filled:
#27. An orbital can accommodate max. of:
#28. The orbital which is spherically symmetrical is:
#29. The SI unit of wave number is:
#30. X-rays were discovered by:
#31. Which of the following particles contain 20n, 19p and 18e:
#32. The electrons in K-shell of the atom will differ in:
#33. The no. of electrons in the M. shell of the element with atomic number 24 is:
#34. The value of Plank’s constant ‘h’ is:
#35. If “r” is the radius of first orbit, the radius of “nth” orbit of H-atom will be:
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CHEMISTRY TEST 7
Welcome to chemistry afns test 7, a comprehensive practice module specifically designed for candidates preparing for the Armed Forces Nursing Services (AFNS) initial entry test. This quiz covers key FSc Chemistry topics and high-frequency multiple-choice questions to boost your performance on exam day.
Key Topics Covered in Chemistry AFNS Test 7
To secure high marks in your AFNS academic initial exam, make sure to thoroughly revise these core chemical concepts:
- Atomic Structure & Quantum Mechanics: Quantum numbers, electronic configurations, orbital shapes, and emission spectra.
- States of Matter (Gases, Liquids & Solids): Ideal gas laws, intermolecular forces, liquid viscosity, surface tension, and crystalline solid structures.
- Chemical Kinetics & Reaction Rates: Order of reaction, activation energy, rate laws, and factors affecting reaction rates.
- Organic Chemistry (Aldehydes & Ketones): Nucleophilic addition reactions, oxidation, reduction, and identification tests like Fehling’s and Tollen’s tests.
Effective Revision Tips for Test 7
- Focus on FSc Principles: Go over standard definitions, formulas, and reaction mechanisms directly from your 1st and 2nd-year FSc Chemistry books.
- Review Missed MCQs: Check your incorrect answers after completing the test to eliminate misunderstandings and strengthen weak areas.
- Timed Practice: Answer questions rapidly to build speed and accuracy under realistic entry test conditions.
Useful Resources & Next Steps
- Next Quiz: Continue forward to practice Chemistry AFNS Test 8.
- Main Hub: Access All AFNS Chemistry Practice Quizzes to attempt tests in proper order.
- Official Information: For official entry test dates and eligibility rules, visit the Join Pak Army Official Website.
Chemistry Academic Test Preparation: Solutions & Colligative Properties
Concentration Units, Raoult’s Law & Thermodynamic Solution Behavior
The physical chemistry of solutions and colligative properties is an essential component of military academic exams. Questions in this section test your capability to compute various concentration units, understand solubility rules, and predict how solute particles affect the physical properties of solvents, such as boiling point, freezing point, and osmotic pressure. Mastery over these numerical and theoretical concepts will set you apart from other candidates.
Pay close attention to the distinction between molality and molarity. Molality is temperature-independent, whereas molarity changes with temperature due to volume fluctuations.
Core Topics Featured in Chemistry Quiz 7
- Concentration Units: Thorough calculations involving Molarity ($M$), Molality ($m$), Normality ($N$), Mass Percentage ($\% w/w$), Parts Per Million (ppm), and Mole Fraction ($X$).
- Types of Solutions & Solubility: Ideal and non-ideal solutions, deviations from Raoult’s Law (positive and negative deviations), and factors affecting solid/gas solubility in liquids (Henry’s Law).
- Colligative Properties: Properties depending solely on the number of solute particles rather than their chemical nature. Includes relative lowering of vapor pressure, boiling point elevation ($\Delta T_b$), and freezing point depression ($\Delta T_f$).
- Osmotic Pressure and Van’t Hoff Factor: Understanding osmosis, osmotic pressure formulas ($\Pi = iCRT$), and the calculation of the Van’t Hoff factor ($i$) for electrolytes undergoing dissociation or association.
Key Colligative Equations
- Boiling Point Elevation: $\Delta T_b = i \times K_b \times m$
- Freezing Point Depression: $\Delta T_f = i \times K_f \times m$
- Raoult’s Law: $P_A = X_A \times P^\circ_A$
Take Chemistry Quiz 7 below to test your numerical proficiency and ensure you are ready for any calculation-based question on test day.
Chemistry Academic Test Preparation: Solutions & Colligative Properties
Concentration Units, Raoult’s Law & Thermodynamic Solution Behavior
The physical chemistry of solutions and colligative properties is an essential component of military academic exams. Questions in this section test your capability to compute various concentration units, understand solubility rules, and predict how solute particles affect the physical properties of solvents, such as boiling point, freezing point, and osmotic pressure. Mastery over these numerical and theoretical concepts will set you apart from other candidates.
Pay close attention to the distinction between molality and molarity. Molality is temperature-independent, whereas molarity changes with temperature due to volume fluctuations.
Core Topics Featured in Chemistry Quiz 7
- Concentration Units: Thorough calculations involving Molarity ($M$), Molality ($m$), Normality ($N$), Mass Percentage ($\% w/w$), Parts Per Million (ppm), and Mole Fraction ($X$).
- Types of Solutions & Solubility: Ideal and non-ideal solutions, deviations from Raoult’s Law (positive and negative deviations), and factors affecting solid/gas solubility in liquids (Henry’s Law).
- Colligative Properties: Properties depending solely on the number of solute particles rather than their chemical nature. Includes relative lowering of vapor pressure, boiling point elevation ($\Delta T_b$), and freezing point depression ($\Delta T_f$).
- Osmotic Pressure and Van’t Hoff Factor: Understanding osmosis, osmotic pressure formulas ($\Pi = iCRT$), and the calculation of the Van’t Hoff factor ($i$) for electrolytes undergoing dissociation or association.
Key Colligative Equations
- Boiling Point Elevation: $\Delta T_b = i \times K_b \times m$
- Freezing Point Depression: $\Delta T_f = i \times K_f \times m$
- Raoult’s Law: $P_A = X_A \times P^\circ_A$
Take Chemistry Quiz 7 below to test your numerical proficiency and ensure you are ready for any calculation-based question on test day.