Pharmacy Practice MCQ » PHARMACAREERS

Pharmacy Practice MCQ, in this article we will solve, Practice MCQ under subject Physical Pharmaceutics. Read following article for your reference.

Crystalline Structures Of Complexes And Thermodynamic Treatment Of Stability Constants » PHARMACAREERS

What is the primary characteristic of crystalline structures?
- A) Random arrangement of atoms
- B) Highly ordered arrangement of atoms
- C) Amorphous structure
- D) None of the above
Which type of crystalline structure has equal axes intersecting at right angles?
- A) Tetragonal
- B) Orthorhombic
- C) Cubic
- D) Hexagonal
Which of the following is an example of a cubic crystal?
- A) Sulfur
- B) Sodium chloride
- C) Zirconium dioxide
- D) Graphite
What is the impact of crystalline form on drug solubility?
- A) Increases solubility
- B) Decreases solubility
- C) No impact
- D) Varies with temperature
Which crystalline structure has three unequal axes intersecting at right angles?
- A) Cubic
- B) Tetragonal
- C) Orthorhombic
- D) Monoclinic

What does the stability constant of a complex indicate?
- A) Solubility of the complex
- B) Affinity between ligand and metal ion
- C) Melting point of the complex
- D) None of the above
Which factor does NOT affect the stability constant of a complex?
- A) Temperature
- B) Pressure
- C) Concentration of reactants
- D) Color of the complex
What is the unit of stability constant?
- A) Molarity (M)
- B) No unit
- C) Liters per mole (L/mol)
- D) Grams per liter (g/L)
Which thermodynamic parameter is used to predict the stability of complexes?
- A) Enthalpy (ΔH)
- B) Entropy (ΔS)
- C) Gibbs free energy (ΔG)
- D) All of the above
What is the significance of a high stability constant?
- A) Low affinity between ligand and metal ion
- B) High affinity between ligand and metal ion
- C) High solubility
- D) Low solubility

Which technique is commonly used to study stability constants?
- A) UV-Vis Spectroscopy
- B) NMR Spectroscopy
- C) X-ray Crystallography
- D) All of the above
What does UV-Vis Spectroscopy measure in the context of stability constants?
- A) Absorbance of light
- B) Emission of light
- C) Scattering of light
- D) None of the above
Which parameter is directly measured by NMR Spectroscopy?
- A) Chemical shifts
- B) Absorbance
- C) Reflectance
- D) Transmittance
What is the role of X-ray Crystallography in studying complexes?
- A) Determining molecular weight
- B) Determining crystal structure
- C) Measuring solubility
- D) Analyzing thermal stability
Which of the following is NOT an application of stability constants in pharmaceutics?
- A) Drug formulation
- B) Drug delivery
- C) Drug metabolism
- D) Drug pricing

How do stability constants affect drug bioavailability?
- A) Increase bioavailability
- B) Decrease bioavailability
- C) No effect
- D) Varies with drug type
What is the impact of crystalline structures on drug dissolution rate?
- A) Increases dissolution rate
- B) Decreases dissolution rate
- C) No impact
- D) Varies with temperature
Which crystalline structure is known for having four axes, three of which are equal and intersect at 120 degrees?
- A) Cubic
- B) Tetragonal
- C) Hexagonal
- D) Orthorhombic
What is the primary benefit of understanding crystalline structures in drug formulation?
- A) Enhancing drug color
- B) Improving drug stability
- C) Reducing drug cost
- D) Increasing drug weight
Which type of crystal structure is characterized by three unequal axes intersecting at oblique angles?
- A) Monoclinic
- B) Triclinic
- C) Orthorhombic
- D) Hexagonal

What is the main difference between crystalline and amorphous structures?
- A) Crystalline structures are ordered; amorphous structures are disordered
- B) Crystalline structures are disordered; amorphous structures are ordered
- C) Both are ordered
- D) Both are disordered
Which crystalline structure example is known for its use in jewelry?
- A) Sodium chloride
- B) Diamond
- C) Graphite
- D) Zirconium dioxide
What is the effect of temperature on the stability constant of a complex?
- A) Always increases
- B) Always decreases
- C) Can increase or decrease
- D) No effect
Which crystalline structure has two equal axes and one axis that is different in length, intersecting at right angles?
- A) Cubic
- B) Tetragonal
- C) Orthorhombic
- D) Monoclinic
What is the significance of thermodynamic parameters in pharmaceutics?
- A) Predicting drug interactions
- B) Determining drug cost
- C) Enhancing drug color
- D) None of the above
Which factor is NOT considered in the thermodynamic treatment of stability constants?
- A) Temperature
- B) Pressure
- C) Concentration
- D) Color
What is the primary focus of the article on crystalline structures and stability constants?
- A) Drug pricing
- B) Drug formulation and stability
- C) Drug marketing
- D) Drug packaging
Which crystalline structure is an example of a monoclinic crystal?
- A) Gypsum
- B) Diamond
- C) Graphite
- D) Sodium chloride
What is the role of analytical techniques in studying crystalline structures?
- A) Measuring drug cost
- B) Determining crystal structure and stability
- C) Enhancing drug color
- D) None of the above
Which crystalline structure has three unequal axes, with one pair intersecting at an angle other than 90 degrees?
- A) Cubic
- B) Tetragonal
- C) Monoclinic
- D) Triclinic

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