ANU UG/Degree 1st Sem Principles of Chemical Sciences Important Questions ( Multidisciplinary Course)

ANU UG/Degree 1st Sem Principles of Chemical Sciences Important Questions ( Multidisciplinary Course) are now available. These questions are prepared by top experienced faculty. By preparing these questions you can get good marks in your external exams.

 

 Unit I: Matter, Atoms, Molecules & Nuclear Chemistry 

Classification of matter, Dalton atomic theory, Thomson Model, Rutherford Model, Bohr’s model of atom, quantum numbers, electronic configuration, Aufbau Principle, Pauli’s exclusion principle, Hund’s rule. Isotopes-Isobars, Nuclear decay, Band of Stability, Nuclear Reaction types, Nuclear Applications.

Short Answer Questions:

1. What are the three main states of matter?
2. What are the postulates of Dalton's Atomic Theory?
3. How does the Rutherford model differ from the Thomson model of the atom?
4. What is the significance of quantum numbers in describing electrons?
5. How does Aufbau principle help in determining the electronic configuration of an atom?

Long Answer Questions:

1. Explain the concept of isotopes and isobars, giving examples of each.
2. Describe the different types of nuclear decay and their characteristics.
3. What is the "Band of Stability" and how does it relate to nuclear stability?
4. Explain the two main types of nuclear reactions and provide examples of each.
5. Discuss the various applications of nuclear chemistry in different fields like medicine, energy production, and technology.

 Unit II: Elements, Classification and Chemical Bonding 

Classification of elements, Periodic Classification of elements based on electronic configuration, classification into types, classification into metals, non-metals and metalloids, periodic propertiesatomic radii, ionisation enthalpy, electronegativity, Octet rule, ionic bond properties of Ionic compounds-covalent bond, properties of covalent molecule.

Short Answer Questions:

1. What is the basis for the periodic classification of elements?
2. How do the properties of metals differ from those of non-metals?
3. What is the relationship between atomic radius and position in the periodic table?
4. What does the term "electronegativity" mean?
5. What is the octet rule and why is it important?

Long Answer Questions:

1. Explain the different block classifications (s, p, d, and f) within the periodic table and provide examples of elements in each block.
2. Describe the factors that affect ionization enthalpy and explain how it varies across the periodic table.
3. Compare and contrast the properties of ionic and covalent bonds, providing examples of each type of bonding.
4. Discuss the factors that influence the polarity of a covalent bond and explain how it relates to electronegativity.
5. Explain the concept of the octet rule and its limitations in predicting the structures of molecules with multiple central atoms or lone pairs.

 Unit III: Acids, Bases, Salts, Chemistry in Daily life 

Definition, types and properties of Acids, Bases, Salts, strength of acids and bases, pH, Importance of Chemistry in daily life. (food, drugs, textiles, preservatives, soaps and detergents.)

Short Answer Questions:

1. What are the main properties of acids?
2. How are bases defined according to Arrhenius theory?
3. What is the difference between a strong acid and a weak acid?
4. What is the pH scale and how does it relate to acidity and basicity?
5. What is the role of chemistry in the preservation of food?

Long Answer Questions:

1. Explain the different theories of acids and bases (Arrhenius, Bronsted-Lowry, and Lewis) and provide examples of each.
2. Describe the neutralization reaction between an acid and a base and its importance in various applications.
3. Explain the role of chemistry in the development of drugs and medicines, including examples of specific drugs and their chemical properties.
4. Discuss the different types of preservatives used in food and beverages and explain their scientific principles.
5. Compare and contrast the cleaning mechanisms of soaps and detergents, highlighting the role of chemistry in their formulation.

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