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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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Quiz

Lesson 1: Qualitative Analysis of Acidic Radicals (Anions) — Lesson quiz

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  • Questions count: 3
  • Passing grade: 60%
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1.
What is the exact chemical deduction according to Egyptian curriculum standards for: Le Chatelier's Principle in Gas-Phase Equilibrium?
Increasing pressure on an equilibrium mixture shifts the reaction toward the side with fewer moles of gas, without changing the equilibrium constant (Kc)
Decreasing volume increases the value of Kp for any reaction
Adding a catalyst shifts the equilibrium position toward products
Increasing temperature always increases the value of Kc for exothermic reactions
2.
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)
3.
What is the exact chemical deduction according to Egyptian curriculum standards for: Markovnikov's Rule in Electrophilic Addition to Alkenes?
Addition occurs with the halogen attaching to the terminal methyl group
When an asymmetric reagent (HX) adds to an asymmetric alkene, the positive hydrogen ion attaches to the double-bonded carbon with more hydrogen atoms, while the halide adds to the more substituted carbon
Hydrogen always attaches to the carbon with fewer hydrogen atoms
Markovnikov's rule applies exclusively to symmetrical alkynes like ethyne
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