Here’s a sample exam pattern for SLO Model Paper Class 9th Chemistry

Pro Eguide SLO Model Paper Class 9th Chemistry

Time: 3 hours Marks: 65

Section A

Time: 20 Minutes Marks: 20

Choose the correct option for the following MCQs:

1. Which branch of chemistry deals with the study of carbon compounds?
   (a) Organic Chemistry (b) Inorganic Chemistry (c) Physical Chemistry (d) Analytical Chemistry
2. What is the term for the weighted average of the masses of the isotopes of an element?
   (a) Atomic mass (b) Molecular mass (c) Relative atomic mass (d) Empirical mass
3. Which of the following represents a molecular ion?
   (a) Na⁺(b) H⁺(c) Cl^–(d) O₂^-2
4. The number of protons in an atom is called its
   (a) Atomic mass (b) Atomic number (c) Mass number (d) Neutron number
5. Which of the following is a characteristic of ionic compounds?
   (a) Low melting points (b) Conduct electricity in solid state; (c) High solubility in water; (d) All of the above
6. What type of bond is formed when two non-metal atoms share electrons?
   (a) Ionic bond (b) Covalent bond (c) Metallic bond (d) Hydrogen bond
7. The process by which a liquid changes into vapor is known as:
   (a) Condensation (b) Evaporation (c) Sublimation (d) Melting
8. Which solution contains the maximum solute that can dissolve at a given temperature?
   (a) Unsaturated solution (b) Saturated solution (c) Supersaturated solution (d) Dilute solution
9. In a redox reaction, the substance that gains electrons is known as the: (a) Reducing agent; (b) Oxidizing agent (c) Catalyst (d) Reactant
10. Which of the following metals is classified as an alkali metal?
    (a) Magnesium (b) Calcium (c) Sodium (d) Aluminum
11. The atomic mass unit (amu) is defined based on which isotope?
    (a) Carbon-14 (b) Oxygen-16 (c) Hydrogen-1 (d) Carbon-12
12. The law stating that in a chemical reaction, matter is neither created nor destroyed is known as:
    (a) Law of Conservation of Energy (b) Law of Multiple Proportions (c) Law of Definite Proportions (d) Law of Conservation of Mass

Section B

Marks: 32

Attempt any 8 short questions from the following:

1. Define ions and provide examples of cations and anions.
2. Differentiate between empirical and molecular formula with examples.
3. Describe Rutherford’s contributions to atomic theory.
4. Explain the octet rule and its significance in chemical bonding.
5. Discuss the properties of liquids and how they differ from solids and gases.
6. What are the main differences between saturated, unsaturated, and supersaturated solutions?
7. Explain the concept of electrolysis and its applications.
8. Describe the formation of an ionic bond with an example.
9. Compare the characteristics of ionic and covalent compounds.
10. What is the significance of noble gases in the periodic table?

Section C

Marks: 21

Attempt any 3 questions from the following:

1. Explain the relationship between atomic structure and the periodic table. How does the electronic configuration affect an element’s position in the periodic table?
2. Discuss the methods of preparing sodium metal from fused NaCl and identify by-products formed during the process.
3. Describe how intermolecular forces affect the properties of solids, liquids, and gases. Provide examples for each state of matter.
4. Sketch an electrolytic cell, label its components, and explain the movement of ions towards the electrodes.
5. Describe the importance and uses of isotopes in various fields, including medicine and industry. Provide specific examples.