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 →
Avogadro’s number, a fundamental constant in chemistry, refers to what specific quantity?
AThe boiling point of water in Kelvin
BThe exact number of elements on the periodic table
CThe atomic number of oxygen
DThe number of particles contained in exactly one mole of a substance
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
What is the primary function of a diode, a basic electronic component used in many circuits?
ATo store electrical energy for later use
BTo allow electric current to flow in only one direction
CTo measure electrical resistance
DTo convert electrical energy directly into sound
In a solution, such as salt dissolved in water, what term describes the substance present in the smaller amount that gets dissolved?
ACatalyst
BSolute
CPrecipitate
DSolvent
What is the chemical formula for methane, the simplest hydrocarbon and the main component of natural gas?
AC6H12O6
BCH4
CCO2
DC2H6
An LED, widely used in modern lighting and electronic displays, stands for which of the following?
ALight Emitting Diode
BLow Energy Detector
CLong Energy Device
DLiquid Electric Display
What term describes a solution that has dissolved the maximum possible amount of a particular solute at a given temperature, meaning no more can dissolve under those conditions?
ADiluted solution
BVolatile solution
CNeutral solution
DSaturated solution
What is the chemical formula for glucose, a simple sugar that serves as a primary energy source for living cells?
AC6H12O6
BCO2
CNaCl
DH2O
Ohm’s Law expresses the relationship between voltage, current, and resistance in an electrical circuit using which formula?
AV equals I plus R
BV equals I minus R
CV equals I divided by R
DV equals I multiplied by R
The octane rating of petrol is primarily a measure of what characteristic of the fuel?
AIts overall color
BIts total weight per liter
CIts exact price per liter
DIts resistance to premature ignition, or engine knocking, under compression