During the electrolysis of a dilute sodium chloride (NaCl) solution, oxygen is produced at the anode. This is because oxygen is the more reactive non-metal species present, and it readily undergoes oxidation to form oxygen gas. The other options, sodium, hydrogen, and chlorine, are produced at the cathode.
102
Coordination number of the transition element in [Pt Cl NO2 (NH3)4]2- is____________________?
Manual review recommended: automated enrichment was incomplete for this item. The original answer and options were preserved. No Gemini key is configured. Add GEMINI_API_KEY to the local server environment or save a Gemini provider key in Settings.
103
What occurs when methane is incompletely oxidized in a limited supply of air?
The octet rule states that atoms tend to gain, lose, or share electrons to achieve a stable configuration with eight valence electrons. Phosphorus (P) can sometimes have an expanded octet, meaning it has more than eight valence electrons.
105
The location of transition elements is in between__________________?
Manual review recommended: automated enrichment was incomplete for this item. The original answer and options were preserved. No Gemini key is configured. Add GEMINI_API_KEY to the local server environment or save a Gemini provider key in Settings.
106
In an electrochemical cell, what is the typical position of the element that functions as the anode?
The anode is where oxidation occurs, and it is typically at a higher position or potential in an electrochemical cell to facilitate the flow of electrons.
107
What is the colored glassy mass in the borax bead test indicative of?
In the borax bead test, the colored glassy mass is formed due to the precipitation of a specific compound. The correct term is 'metal metaborate'. A metaborate is a chemical compound containing boron in its +5 oxidation state and is typically formed when a borax (sodium tetraborate) solution reacts with an alkali earth or alkaline earth element. The test helps identify these elements.
108
What process involves extracting a metal in its molten form?
Smelting is a metallurgical process where an ore is heated to high temperatures, typically with a reducing agent, to extract the desired metal in its molten state, separating it from impurities and other elements.
109
The oxidation state of transition elements is usually _______________________?
Manual review recommended: automated enrichment was incomplete for this item. The original answer and options were preserved. No Gemini key is configured. Add GEMINI_API_KEY to the local server environment or save a Gemini provider key in Settings.
Transition metals are characterized by their ability to exhibit multiple oxidation states. Cobalt (Co) is a typical example, as it can exhibit oxidation states ranging from +2 to +3. In contrast, Scandium (Sc), Yttrium (Y), and Cadmium (Cd) do not exhibit this property.
