chemistry test 10 - PAK ARMED FORCES TEST

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QUIZ START

#1. For isoelectronic species, what is the relationship between ionic radius and nuclear charge?

Directly proportional

Inversely proportional

Independent

None of these

#2. Compared to its parent atom, a cation always has:

A larger size

A smaller size

The same size

Cannot be predicted

#3. What is the approximate equilibrium bond distance for the H2 molecule?

0.05 nm

0.075 nm

0.1 nm

0.125 nm

#4. Which of the following half-reactions represents an oxidation process?

MnO₄⁻ → Mn²⁺

Cu²⁺ → Cu

Fe²⁺ → Fe³⁺

Cr₂O₇²⁻ → Cr³⁺

#5. Which of the following half-reactions represents a reduction process?

H₂S → S

Cl⁻ → Cl₂

Cr₂O₇²⁻ → Cr³⁺

SO₃²⁻ → SO₄²⁻

#6. When balancing a redox reaction using the ion-electron method, what is the primary role of H₂O molecules?

To balance hydrogen atoms.

To balance oxygen atoms.

To balance charges.

To act as a spectator ion.

#7. What is the usual oxidation number of hydrogen in most of its compounds?

-1

#8. What is the usual oxidation number of oxygen in most of its compounds?

-1

-2

#9. What is the oxidation number of Manganese (Mn) in KMnO₄?

#10. What is a ‘system’ in thermochemistry?

The surroundings of a reaction

Anything under test or consideration

The boundary separating reactants and products

The universe

#11. Which of the following is NOT a state function?

Pressure

Volume

Heat

Internal Energy

#12. A state function is a property that:

Depends on the path taken to reach a state

Has definite values for initial and final states

Is constantly changing

Is irrelevant to thermodynamics

#13. The rate of a reaction involving ions can be studied using:

Spectrometric method

Dilatometric method

Optical rotation method

Electrical conductivity method

#14. Which method is useful for determining the rate of reactions that involve small volume changes in solutions?

Refractometric method

Dilatometric method

Optical rotation method

Spectrometric method

#15. Which rate determination method is suitable for reactions in solutions where changes in refractive index occur?

Dilatometric method

Optical rotation method

Refractometric method

Spectrometric method

#16. Lattice energy decreases with the increase in size of ion because oppositely charged ions

Have close packing

Have low empty spaces

Becomes less tight

Have strong electrostatic forces

#17. Ionic solids are characterized by:

Low melting point

Good conductivity in solid state

High vapor pressure

Solubility in polar solvent

#18. Which solids are called true solids?

Metallic

Amorphous

Crystalline

Vitreous

#19. Which ionic solid has highest lattice energy

LiCl

NaCl

KCl

CsCl

#20. Which of the following intermolecular forces are present in solid iodine

Dipole - Dipole forces

London dispersion forces

Hydrogen bonding

Debye forces

#21. Which of the following is not amorphous solid

Glass

Table salt

Glue

Rubber

#22. Which of the following correctly represents the relationship between Kp and Kc?

Kp = Kc (R)Δⁿ

Kp = Kc (RT)Δⁿ

Kc = Kp (RT)Δⁿ

Kp = Kc (R/N)Δⁿ

#23. For the given reaction: PCl5 ⇌ PCl3+Cl2

Kp > Kc

Kp < Kc

Kp = Kc

Kp = Kc = 0

#24. For the reaction H2+I2 ⇌ 2HI. If the equilibrium concentrations of H₂, I₂, and HI are 8, 3, and 24mol/dm³, respectively, what is the equilibrium constant Kc?

#25. How do chondrocytes primarily receive their nutrient supply?

Through direct blood vessels.

By diffusion.

Via nerve tissue.

Through direct contact with bone.

#26. Why does cartilage heal very slowly?

It lacks nerve tissue.

It has a very rigid matrix.

It lacks blood vessels.

It is constantly under pressure.

#27. Which type of cartilage is found at the ends of long bones, in the nose, larynx, and trachea?

Fibrocartilage

Elastic cartilage

Hyaline cartilage

Reticular cartilage

Finish

Results

#1. For isoelectronic species, what is the relationship between ionic radius and nuclear charge?

#2. Compared to its parent atom, a cation always has:

#3. What is the approximate equilibrium bond distance for the H2 molecule?

#4. Which of the following half-reactions represents an oxidation process?

#5. Which of the following half-reactions represents a reduction process?

#6. When balancing a redox reaction using the ion-electron method, what is the primary role of H₂O molecules?

#7. What is the usual oxidation number of hydrogen in most of its compounds?

#8. What is the usual oxidation number of oxygen in most of its compounds?

#9. What is the oxidation number of Manganese (Mn) in KMnO₄?

#10. What is a ‘system’ in thermochemistry?

#11. Which of the following is NOT a state function?

#12. A state function is a property that:

#13. The rate of a reaction involving ions can be studied using:

#14. Which method is useful for determining the rate of reactions that involve small volume changes in solutions?

#15. Which rate determination method is suitable for reactions in solutions where changes in refractive index occur?

#16. Lattice energy decreases with the increase in size of ion because oppositely charged ions

#17. Ionic solids are characterized by:

#18. Which solids are called true solids?

#19. Which ionic solid has highest lattice energy

#20. Which of the following intermolecular forces are present in solid iodine

#21. Which of the following is not amorphous solid

#22. Which of the following correctly represents the relationship between Kp and Kc?

#23. For the given reaction: PCl5 ⇌ PCl3+Cl2

#24. For the reaction H2+I2 ⇌ 2HI. If the equilibrium concentrations of H₂, I₂, and HI are 8, 3, and 24mol/dm³, respectively, what is the equilibrium constant Kc?

#25. How do chondrocytes primarily receive their nutrient supply?

#26. Why does cartilage heal very slowly?

#27. Which type of cartilage is found at the ends of long bones, in the nose, larynx, and trachea?

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