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Potassium: Quiz

  
  
  
  
  

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More interesting facts on Potassium

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Question 1: ________
Fr
Atomic Number: 87
Atomic Weight: (223)
Melting Point: 295(?) K
Boiling Point: 950(?) K
Specific mass: ?
CaesiumHeliumUraniumFrancium

Question 2: Potassium bromide (KBr), potassium iodide (KI) and ________ (KCl) are used in photographic emulsion to make the corresponding photosensitive silver halides.
Potassium nitratePotassium permanganatePotassium hydroxidePotassium chloride

Question 3: It must be stored under a dry inert gas atmosphere or anhydrous ________ to prevent the formation of a surface layer of potassium superoxide.
WaxMineral oilBeeswaxPetroleum jelly

Question 4: Potassium cobaltinitrite K3[Co(NO2)6] is used as artist's pigment under the name of Aureolin or ________ yellow.
ZincCobaltNickelChromium

Question 5: Elemental potassium was not known in Roman times, and its names are not ________ but rather neo-Latin.
Vulgar LatinClassical LatinLatin literatureOld Latin

Question 6: The name potassium was made from the word "________", which is English, and originally meant an alkali extracted in a pot from the ash of burnt wood or tree leaves.
PotashUnited StatesSpainRussia

Question 7: Its primary use in ________, horticulture and hydroponic culture is as a fertilizer as the chloride (KCl), sulfate (K2SO4) or nitrate (KNO3).
Organic farmingAgricultureIntensive farmingSustainable agriculture

Question 8: Potassium ions are an essential component of ________ nutrition and are found in most soil types.
FungusPlantArchaeplastidaRed algae

Question 9: Potassium is also important in preventing muscle contraction and the sending of all nerve impulses in animals through ________.
Ion channelPhotoreceptor cellAction potentialNeuron

Question 10: The principal source of potassium, potash, is mined in Saskatchewan, ________, Germany, New Mexico, Utah, and in other places around the world.
CaliforniaSan Jose, CaliforniaSacramento, CaliforniaLos Angeles
















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