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Chemistry

Chapter 1 - Transition Elements and Iron Metallurgy

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Chapter 2 - Chemical Analysis

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Chapter 3 - Chemical Equilibrium

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Chapter 4 - Electrochemistry

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Chapter 5 - Organic Chemistry

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Lesson 1: First Transition Series, Electronic Configurations and Economic Significance — Lesson quiz

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  • Questions count: 5
  • Passing grade: 60%
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1.
Why is Zinc (30Zn) not considered a transition element according to ministerial IUPAC definition?
Its 3d sublevel is completely filled in both atomic state and +2 oxidation state
It does not conduct electricity
It only has one radioactive isotope
It forms colored ionic complexes in aqueous solutions
2.
Which transition element compound is utilized as a catalyst in the manufacture of sulfuric acid via the Contact Process?
Vanadium(V) oxide (V₂O₅)
Potassium permanganate (KMnO₄)
Iron(III) oxide (Fe₂O₃)
Titanium dioxide (TiO₂)
3.
What is the exact chemical deduction according to Egyptian curriculum standards for: Electronic Configuration of the First Transition Series?
Chromium (Cr: 24) has an anomalous configuration [Ar] 4s1 3d5 to achieve half-filled d-subshell stability, and Copper (Cu: 29) is [Ar] 4s1 3d10 for completely filled d-subshell stability
Scandium (Sc: 21) exhibits stable oxidation states of +1, +2, and +3
Both Chromium and Copper have fully filled 4s2 orbitals
Zinc (Zn: 30) is considered a typical transition element in all its compounds
4.
What is the exact chemical deduction according to Egyptian curriculum standards for: Le Chatelier's Principle in Gas-Phase Equilibrium?
Decreasing volume increases the value of Kp for any reaction
Increasing pressure on an equilibrium mixture shifts the reaction toward the side with fewer moles of gas, without changing the equilibrium constant (Kc)
Increasing temperature always increases the value of Kc for exothermic reactions
Adding a catalyst shifts the equilibrium position toward products
5.
What is the exact chemical deduction according to Egyptian curriculum standards for: Standard Hydrogen Electrode (SHE) and Galvanic Cells?
SHE potential changes to 1.00 V when connected to Zinc
SHE can only act as an anode and never as a cathode
The standard hydrogen electrode uses pure copper wire without platinum black
SHE has an arbitrarily defined standard potential E° = 0.00 V under standard conditions (1 atm H₂ gas, 1.0 M H+ solution, 298 K)
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