What is the chemical symbol for the element potassium?
APt
BP
CPo
DK
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Archives: MCQs
What is the chemical formula for glucose, a simple sugar that serves as a primary energy source for living cells?
AC6H12O6
BCO2
CNaCl
DH2O
What is the chemical formula for methane, the simplest hydrocarbon and the main component of natural gas?
AC6H12O6
BCH4
CCO2
DC2H6
Aspirin, one of the most widely used over-the-counter pain relievers, is chemically known by what specific name?
AAcetaminophen
BAcetylsalicylic acid
CIbuprofen
DAscorbic acid
Vitamin C is chemically known by what specific name?
AAscorbic acid
BCitric acid
CAcetic acid
DFolic acid
Beyond its common use as a food ingredient for baking, sodium bicarbonate, or baking soda, can also be used for what practical safety purpose?
AAs fuel for vehicles
BAs a simple agent to help smother small kitchen grease or electrical fires
CAs a strong industrial acid
DAs a substitute for drinking water
Ethylene, a naturally occurring plant hormone in gas form, is commonly used commercially for what agricultural purpose?
ATo kill weeds permanently
BTo help fruits like bananas ripen more quickly
CTo fertilize soil directly
DTo preserve fruit indefinitely without ripening
Traditional lead-acid car batteries, still commonly used to start vehicle engines, rely on which acid as their electrolyte?
AAcetic acid
BSulfuric acid
CNitric acid
DHydrochloric acid
Antacid tablets, commonly used to relieve heartburn and indigestion, work by doing what to excess stomach acid?
ANeutralizing excess stomach acid using a mild base
BIncreasing the acidity of the stomach further
CPhysically absorbing all liquid in the stomach
DConverting stomach acid directly into water only
Paper chromatography, a simple laboratory technique often used to separate the different pigments in ink, works based on what general principle?
ADifferent substances moving at different rates through a paper medium as a solvent travels through it
BAdding a strong acid to dissolve unwanted components
CFreezing substances to separate them by density
DBoiling different substances at different temperatures