Manganese: Quiz


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More interesting facts on Manganese

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Question 1: [1] Pure manganese used for the production of non-iron alloys is produced by leaching manganese ore with ________ and a subsequent electrowinning process.
Sulfuric acidHydrochloric acidAcetic acidAmmonia

Question 2: The most common ________ of manganese are +2, +3, +4, +6 and +7, though oxidation states from -3 to +7 are observed.
Oxidation stateHydrogenOxygenOxide

Question 3: Mn–Cr isotopic ratios reinforce the evidence from 26Al and 107Pd for the early history of the ________.
EarthSolar SystemSunPlanet

Question 4: The primary decay mode before the most abundant stable isotope, 55Mn, is electron capture and the primary mode after is ________.
Beta decayAlpha decayNuclear fusionNuclear fission

Question 5: The isotopes of manganese range in ________ from 46 u (46Mn) to 65 u (65Mn).
Atomic weightFluorineBoronAvogadro constant

Question 6: Manganese is a gray–white ________, resembling iron.
NonmetalHalogenNoble gasMetal

Question 7: [1] Manganese metal and its common ions are ________.
ParamagnetismFerromagnetismMagnetismMagnetic field

Question 8: First hydrochloric acid, or a mixture of dilute sulfuric acid and sodium chloride was reacted with manganese dioxide, later hydrochloric acid from the ________ was used and the manganese dioxide was recycled by the Weldon process.
Sodium carbonateLeblanc processSolvay processUnited Kingdom

Question 9: [20] In minor applications, (e.g., manganese phosphating), zinc and sometimes ________ are viable substitutes.

Question 10: In ancient times, two black minerals from ________ in what is now modern Greece were both called magnes, but were thought to differ in gender.
MagnesiaEuboeaKarditsa PrefectureLarissa Prefecture

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