Everyday Science
Everyday Science MCQs With Answers
741 Everyday Science MCQs for CSS, PPSC, FPSC, NTS and entry-test preparation. Take a scored quiz instead →
What is the anaerobic process, carried out by yeast, that converts sugar into alcohol and carbon dioxide?
AElectrolysis
BDistillation
COxidation
DFermentation
On the pH scale, substances like soap and baking soda that are basic, or alkaline, typically have a pH value that is what?
AExactly 7
BAlways exactly 14
CBelow 7
DAbove 7
Concave mirrors, which produce a magnified image when an object is held close, are commonly used for which everyday purpose?
AWindow glass
BSunglasses lenses
CVehicle side mirrors
DMagnifying mirrors, such as those used by dentists
Why does a metal object often feel colder to the touch than a wooden object, even when both are at the same room temperature?
AMetal is actually always colder than wood
BWood generates its own heat
CMetal absorbs more light than wood
DMetal conducts heat away from the hand more quickly than wood does
What is the chemical process called in which fats or oils react with an alkali to produce soap?
AFermentation
BDistillation
CSaponification
DOxidation
How does a universal indicator differ from simple litmus paper when testing pH?
AIt changes color based on temperature rather than pH
BIt shows a gradual range of colors corresponding to different pH values across the scale
CIt only ever shows a single fixed color regardless of pH
DIt can only detect acids, never bases
What optical phenomenon, in which light is completely reflected within a denser medium, forms the basis of fiber-optic communication?
ATotal internal reflection
BPolarization
CDispersion
DDiffraction
What formula is used to calculate the density of a substance?
ADensity equals mass multiplied by volume
BDensity equals mass divided by volume
CDensity equals volume divided by mass
DDensity equals mass minus volume
What key advantage do synthetic detergents generally have over traditional soap?
ADetergents work effectively even in hard water, unlike soap
BDetergents are edible while soap is not
CDetergents are always cheaper to produce
DDetergents never produce any foam