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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 5 - Organic Chemistry

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Quiz

Lesson 1 Quiz: Qualitative Analysis of Acidic Radicals (Anions)

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  • Questions count: 20
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1.
STEM Chemical Equilibrium Problem 40: For the equilibrium reaction: N2(g) + 3 H2(g) 2 NH3(g) (ΔH = -92 kJ/mol), which change will shift the equilibrium to the right and increase ammonia yield?
Increasing temperature and decreasing pressure
Removing nitrogen gas continuously from the chamber
Decreasing temperature and increasing total pressure
Adding a positive catalyst at constant volume
2.
STEM Transition Elements Problem 25: Why are most compounds of transition metals in the first series colored and paramagnetic?
Because of the total absence of electrons in the d-subshell
Because they possess completely filled 3d10 orbitals
Due to the presence of unpaired electrons in 3d orbitals that absorb specific wavelengths of visible light for d-d excitation
Due to nuclear fission within the metal atom
3.
STEM Organic Distinction Problem 6: How can you chemically distinguish between phenol (C6H5OH) and ethanol (C2H5OH) using a simple qualitative test?
Heating with concentrated sulfuric acid at 180°C
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
Adding sodium metal: only ethanol reacts with sodium
Adding litmus paper: ethanol turns blue litmus red
4.
STEM Organic Distinction Problem 26: How can you chemically distinguish between phenol (C6H5OH) and ethanol (C2H5OH) using a simple qualitative test?
Adding sodium metal: only ethanol reacts with sodium
Heating with concentrated sulfuric acid at 180°C
Adding litmus paper: ethanol turns blue litmus red
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
5.
STEM Chemical Equilibrium Problem 14: For the equilibrium reaction: N2(g) + 3 H2(g) 2 NH3(g) (ΔH = -92 kJ/mol), which change will shift the equilibrium to the right and increase ammonia yield?
Increasing temperature and decreasing pressure
Removing nitrogen gas continuously from the chamber
Decreasing temperature and increasing total pressure
Adding a positive catalyst at constant volume
6.
STEM Chemical Equilibrium Problem 3: For the equilibrium reaction: N2(g) + 3 H2(g) 2 NH3(g) (ΔH = -92 kJ/mol), which change will shift the equilibrium to the right and increase ammonia yield?
Removing nitrogen gas continuously from the chamber
Decreasing temperature and increasing total pressure
Increasing temperature and decreasing pressure
Adding a positive catalyst at constant volume
7.
STEM Organic Distinction Problem 25: How can you chemically distinguish between phenol (C6H5OH) and ethanol (C2H5OH) using a simple qualitative test?
Adding litmus paper: ethanol turns blue litmus red
Heating with concentrated sulfuric acid at 180°C
Adding sodium metal: only ethanol reacts with sodium
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
8.
STEM Chemical Equilibrium Problem 44: For the equilibrium reaction: N2(g) + 3 H2(g) 2 NH3(g) (ΔH = -92 kJ/mol), which change will shift the equilibrium to the right and increase ammonia yield?
Adding a positive catalyst at constant volume
Removing nitrogen gas continuously from the chamber
Increasing temperature and decreasing pressure
Decreasing temperature and increasing total pressure
9.
STEM Chemical Equilibrium Problem 4: For the equilibrium reaction: N2(g) + 3 H2(g) 2 NH3(g) (ΔH = -92 kJ/mol), which change will shift the equilibrium to the right and increase ammonia yield?
Decreasing temperature and increasing total pressure
Adding a positive catalyst at constant volume
Removing nitrogen gas continuously from the chamber
Increasing temperature and decreasing pressure
10.
STEM Chemical Equilibrium Problem 35: For the equilibrium reaction: N2(g) + 3 H2(g) 2 NH3(g) (ΔH = -92 kJ/mol), which change will shift the equilibrium to the right and increase ammonia yield?
Adding a positive catalyst at constant volume
Removing nitrogen gas continuously from the chamber
Decreasing temperature and increasing total pressure
Increasing temperature and decreasing pressure
11.
STEM Chemical Equilibrium Problem 23: For the equilibrium reaction: N2(g) + 3 H2(g) 2 NH3(g) (ΔH = -92 kJ/mol), which change will shift the equilibrium to the right and increase ammonia yield?
Decreasing temperature and increasing total pressure
Adding a positive catalyst at constant volume
Removing nitrogen gas continuously from the chamber
Increasing temperature and decreasing pressure
12.
STEM Organic Distinction Problem 15: How can you chemically distinguish between phenol (C6H5OH) and ethanol (C2H5OH) using a simple qualitative test?
Adding litmus paper: ethanol turns blue litmus red
Heating with concentrated sulfuric acid at 180°C
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
Adding sodium metal: only ethanol reacts with sodium
13.
STEM Chemical Equilibrium Problem 5: For the equilibrium reaction: N2(g) + 3 H2(g) 2 NH3(g) (ΔH = -92 kJ/mol), which change will shift the equilibrium to the right and increase ammonia yield?
Decreasing temperature and increasing total pressure
Adding a positive catalyst at constant volume
Increasing temperature and decreasing pressure
Removing nitrogen gas continuously from the chamber
14.
STEM Chemical Equilibrium Problem 20: For the equilibrium reaction: N2(g) + 3 H2(g) 2 NH3(g) (ΔH = -92 kJ/mol), which change will shift the equilibrium to the right and increase ammonia yield?
Increasing temperature and decreasing pressure
Adding a positive catalyst at constant volume
Removing nitrogen gas continuously from the chamber
Decreasing temperature and increasing total pressure
15.
STEM Chemical Equilibrium Problem 15: For the equilibrium reaction: N2(g) + 3 H2(g) 2 NH3(g) (ΔH = -92 kJ/mol), which change will shift the equilibrium to the right and increase ammonia yield?
Increasing temperature and decreasing pressure
Removing nitrogen gas continuously from the chamber
Adding a positive catalyst at constant volume
Decreasing temperature and increasing total pressure
16.
STEM Chemical Equilibrium Problem 42: For the equilibrium reaction: N2(g) + 3 H2(g) 2 NH3(g) (ΔH = -92 kJ/mol), which change will shift the equilibrium to the right and increase ammonia yield?
Decreasing temperature and increasing total pressure
Increasing temperature and decreasing pressure
Adding a positive catalyst at constant volume
Removing nitrogen gas continuously from the chamber
17.
STEM Chemical Equilibrium Problem 2: For the equilibrium reaction: N2(g) + 3 H2(g) 2 NH3(g) (ΔH = -92 kJ/mol), which change will shift the equilibrium to the right and increase ammonia yield?
Increasing temperature and decreasing pressure
Removing nitrogen gas continuously from the chamber
Decreasing temperature and increasing total pressure
Adding a positive catalyst at constant volume
18.
STEM Organic Distinction Problem 22: How can you chemically distinguish between phenol (C6H5OH) and ethanol (C2H5OH) using a simple qualitative test?
Adding sodium metal: only ethanol reacts with sodium
Heating with concentrated sulfuric acid at 180°C
Adding litmus paper: ethanol turns blue litmus red
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
19.
STEM Chemical Equilibrium Problem 34: For the equilibrium reaction: N2(g) + 3 H2(g) 2 NH3(g) (ΔH = -92 kJ/mol), which change will shift the equilibrium to the right and increase ammonia yield?
Decreasing temperature and increasing total pressure
Adding a positive catalyst at constant volume
Increasing temperature and decreasing pressure
Removing nitrogen gas continuously from the chamber
20.
STEM Organic Distinction Problem 19: How can you chemically distinguish between phenol (C6H5OH) and ethanol (C2H5OH) using a simple qualitative test?
Adding litmus paper: ethanol turns blue litmus red
Heating with concentrated sulfuric acid at 180°C
Adding sodium metal: only ethanol reacts with sodium
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
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