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Carnauba wax: Quiz


Question 1: It is practically insoluble in water, soluble on heating in ________ and in xylene, practically insoluble in ethyl alcohol.
Ethyl acetateAcetic acidAcetoneEthanol

Question 2: Carnauba wax can produce a glossy finish and as such is used in ________ waxes, shoe polishes, food products such as sweets, instrument polishes, and floor and furniture waxes and polishes, especially when mixed with beeswax and with turpentine.
Vacuum servoThrottleDisc brakeAutomobile

Question 3: Carnauba, also called Brazil wax and palm wax, is a wax of the leaves of the palm, Copernicia prunifera, a plant native to and grown only in the northeastern Brazilian states of Piauí, Ceará, and ________.
Natal, Rio Grande do NortePernambucoParaíbaRio Grande do Norte

Question 4: In 1890, Charles Tainter patented the use of carnauba wax on phonograph cylinders as a replacement for a mixture of paraffin and ________.
ButtonBeeswaxTracing paperScissors

Question 5: Cinnamic acid, an ________, may be hydroxylated or methoxylated.
Human nutritionAntioxidantNutritionMetabolism

Question 6: Carnauba wax contains mainly ________ of fatty acids (80-85%), fatty alcohols (10-16%), acids (3-6%) and hydrocarbons (1-3%).
AlkaneCarboxylic acidFunctional groupEster

Question 7: Carnauba is used in melt/castable explosives to produce an insensitive explosive formula such as Composition B, which is a blend of ________ and TNT.
RDXPentaerythritol tetranitrateNitric acidHMX

Question 8: It is the main ingredient in surfboard wax, combined with ________.
SoybeanPalm oilCoconut oilButter

Question 9: When used as a mold release, carnauba, unlike silicone or PTFE, is suitable for use with liquid epoxy, ________ molding compounds (EMC) and some other plastic types.

Question 10: Specific for carnauba wax is the content of esterified fatty diols (about 20%), hydroxylated ________ (about 6%) and cinnamic acid (about 10%).
LipidFatty acidLinoleic acidButyric acid


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