Household Chemistry quiz
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What is household bleach mostly made of?
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More questions about Household Chemistry
These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.
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What does pure methane smell like?
Answer: Nothing
Why: The rotten-egg smell of a gas leak comes from sulfur odorants such as mercaptans, added on purpose so leaks get noticed.
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What process makes mothballs shrink without melting?
Answer: Sublimation
Why: As they shrink they release naphthalene or paradichlorobenzene vapor, which is what kills moths and their larvae.
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Which cooking oil has the highest iodine value?
Answer: Flaxseed oil
Why: A high iodine value marks oils rich in polyunsaturated fats that cross-link and harden during polymerization.
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What gas fills most bags of potato chips?
Answer: Nitrogen
Why: Oxygen would turn the chips' oil rancid, but nitrogen leaves it alone and doubles as a cushion against crumbs.
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Which dissolved metals make tap water hard?
Answer: Calcium and magnesium
Why: A major part of soap scum is calcium stearate, formed when hard water's calcium takes the place of sodium in soap.
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Why do many dishwashers need special salt?
Answer: Water softener
Why: Salty brine flushes trapped calcium and magnesium off the softener's resin beads, readying them to soften more water.
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