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Federal (FBISE) · Chapter test · Free

9th Class Chemistry Chapter 6 Test06. Stoichiometery

28 marks · 40 minutes · 19 questions. Covers: 06. Stoichiometery.

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9th Class Chemistry Chapter 6 Test

9th Class · Chemistry · Federal (FBISE)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 28Time: 40 minutes

Q1. Multiple choice questions (Attempt all · 8 × 1 = 8)

  1. What is the mass of carbon present in 44 g of carbon dioxide?
    1. 12 g
    2. 6 g
    3. 24 g
    4. 44 g
  2. Number of particles in one mole of a substance is called:
    1. Atomic number
    2. Particle number
    3. Avogadro’s number
    4. Mass number
  3. What is the molar mass of H₃PO₄?
    1. 58.5
    2. 98
    3. 40
    4. 48
  4. What is the formula mass of CuSO₄·5H₂O?
    1. 159.5
    2. 185.5
    3. 249.5
    4. 149.5
  5. Which term is same for one mole of oxygen and one mole of water?
    1. volume
    2. mass
    3. atoms
    4. molecules
  6. A compound Na₂CX₃ has formula mass 106 amu. Atomic mass of X is:
    1. 106
    2. 23
    3. 12
    4. 16
  7. Gram atom of Na is equal to:
    1. 23 amu
    2. 23 g
    3. 24 amu
    4. None
  8. What is the mass of 4 moles of hydrogen gas?
    1. 8.064 g
    2. 4.032 g
    3. 1 g
    4. 1.008 g

Q2. Short questions (Attempt any 6 of 8 · 6 × 2 = 12)

  1. During galvanizing iron sheet is dipped into:
    1. Sn
    2. Zn
    3. SnCl₂
    4. ZnCl₂
  2. Silver tarnish in the presence of:
    1. SO₂
    2. H₂S
    3. Both a and b
    4. None of these
  3. By painting the metal __________ cannot touch the metal surface.
    1. oxygen
    2. moisture
    3. both a and b
    4. none of them
  4. Reduction involves:
    1. loss electrons
    2. gain electrons
    3. loss of hydrogen
    4. none of these
  5. Which act as anode in cathodic protection method?
    1. Mg
    2. Al
    3. Both a and b
    4. None of these
  6. How is flame test performed?
  7. Explain the crystallization?
  8. Explain the paper chromatography?

Q3. Long questions (Attempt any 2 of 3 · 2 × 4 = 8)

  1. Explain Gram atomic mass, Gram molecular mass and Gram formula mass.
  2. Identify the substance that has formula mass of 133.5 amu. (a) MgCl₂ (b) S₂Cl₂ (c) BCl₃ (d) AlCl₃
  3. Define Molecular mass and formula mass. How they can be calculated?