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Punjab (PTB) · Half book test (board pattern) · Free

9th Class Chemistry First half Book Paper

60 marks · About 2 hours (objective and subjective) · 39 questions. Covers: 7 chapters (CHAP 1: States of Matter and Phase Changes to CHAP 7: Acid Base Chemistry).

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9th Class Chemistry First half Book Paper

9th Class · Chemistry · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 60Time: About 2 hours (objective and subjective)

Q1. Multiple choice questions (Attempt all · 12 × 1 = 12)

  1. Atomic mass of Sulphur is:

    1. 31.972 amu

    2. 31.92 g

    3. 31.92 kg

    4. All of these

  2. Nitrogen molecules contains:

    1. Polar covalent bond

    2. Single covalent bond

    3. Double covalent bond

    4. Triple covalent bond

  3. A mixture in which solute particles do not dissolve in the solvent is:

    1. Solution

    2. Surpension

    3. Colloidal

    4. All of these 

  4. Calcium carries charge:

  5. The direction of irreversible reaction is:

    1. Reverse

    2. Forward

    3. Both

    4. None of these

  6. Which of the following contains oxallic acid:

    1. Tomato

    2. Orange

    3. Tamarind

    4. Sour milk

  7. In which form the energy is stored in a molecule?

    1. Chemical energy

    2. Heat energy

    3. Elastic potential

    4. Mechanical energy

  8. Relative atomic mass of krypton:

    1. 12.0

    2. 57.3

    3. 17.8

    4. 83.7

  9. Role of doner atom in coordinate covalent bond:

    1. Accept electrons

    2. Donate electrons

    3. Share electron

    4. Form complex ion 

  10. Which one of the following is not a homogeneous mixture?

    1. Solution of salt

    2. Solution of sugar

    3. Milk

    4. Rock

  11. How many atomic mass units (amu) are there in one gram?

  12. A reverse reaction is one that:

    1. Proceeds from left to right

    2. In which reactants react to form products

    3. Slows down gradually

    4. Speeds up gradually

Q2. Short questions (Attempt any 5 of 8 · 5 × 2 = 10)

  1. What is the structure of graphite.

  2. Give an example of a radioactive isotope which disintegrates to give a stable atom. 

  3. How variation of solubility at different temperatures can be useful for us? 

  4. Draw a structure of water molecules showing hydrogen bonding.

  5. How many atoms does our body replace every year?

  6. What is the importance of graphene?

  7. Describe the phenomenon of forming ionic bond between sodium chloride by equations?

  8. During discharge tube experiments, how did the scientists conclude that the same type of electrons and protons are present in all the elements?

Q3. Short questions (Attempt any 5 of 8 · 5 × 2 = 10)

  1. Differentiate between chemical energy and heat energy.

  2. Write down the chemical formulas of the following compounds: Calcium phosphate, Aluminium nitride, Sodium acetate, Ammoniun carbonate and Bismuth sulphate.

  3. Elaborate an example of dynamic equilibrium which exists in this world between the three physical states of water. 

  4. How catalyst increase the rate of reaction?

  5. Write 4 steps to write a chemical equation?

  6. What are irreversible reactions? Give few characteristics of them.

  7. Why chemical reaction are endothermic and exothermic?

  8. What are the significance of Avogadro's number?

Q4. Short questions (Attempt any 5 of 8 · 5 × 2 = 10)

  1. Differentiate b/w natural & mineral acids?

  2. Name the gas liberated when alkalis react with ammonium salt.

  3. Write reaction of alkalies with ammonium salts.

  4. How acid rain effects aquatic life?

  5. Define Bronsted-Lowery acid and base.

  6. Why does Na2CO3 behave like a base in water?

  7. What happen when acids react within alkalis?

  8. Differentiate b/w Arrhenius acids & Bases? Also give their example?

Q5. Long questions (Attempt any 2 of 3 · 2 × 9 = 18)

  1. Which conditions must be fulfilled before writing a chemical equation for a reaction?

  2. Discuss formation of coordinate covalent bond with examples.

  3. Describe dynamic equilibrium with examples.