Which of the Following Ions Is Least Likely to Form

question 64

Multiple Choice

Which of the following ions is least likely to form colored compounds?

• A)Mn ²⁺
• B)Cr ⁵⁺
• C)Sc ³⁺
• D)Fe ³⁺
• E)Co ²⁺

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API GL-5

A classification of lubricants, defined by the American Petroleum Institute, indicating oil suitability for high-pressure conditions in vehicle axles and transmissions.

Zerk Fitting

A standard grease nipple. Its orifice is sealed with a spring-loaded ball that unseats when pressurized grease is applied to it.

Grease Nipple

A fitting used on mechanical systems to feed lubricants under pressure into bearings, joints, or mechanical systems.

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Various chemical formulations used to lower the freezing point and raise the boiling point of the coolant in engines.