In Order, from Top to Bottom, in the Activity Series

question 58

Multiple Choice

In order, from top to bottom, in the activity series come K, Zn, Pb, H, Cu, and Au. Therefore,

• A) adding Pb to ZnCl₂ will release Zn.
• B) adding Cu to HCl will release hydrogen.
• C) adding Au to HCl will release hydrogen.
• D) adding Cu to AuCl₃ will release Au.

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Definitions:

TON Instruction

stands for "Timer ON Delay" in PLC programming, used to activate an output after a predefined time delay once the input becomes true.

Reset (RES)

A command or signal that initiates the restart or reinitialization of a device, system, or software to its default state.

Logic Continuity

Logic continuity refers to the unbroken flow of logical operations or conditions in a system, ensuring that the logical structure is maintained from input through processing to output.

TOF Timer

A "Timer Off-Delay" that starts timing when its input turns off, and after the preset time, changes the state of its output.