Everyday Science MCQs

Page No. 115

When a ray of sunlight enters a dark room , its straight path become visible because of dust particles hanging in the air. It is because light is _________?


aVisible


bTransparent


cInvisible


dopaque


View Answer Visible

It is possible to recognize a person in the dark by simply hearing his unique voice . It is because of the_______?


apitch


bFrequency


cTime period


dQuality


View Answer pitch

The echo (reflected sounD. will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least ________?


a1120 ft


b120 ft


c56 ft


d100 ft


View Answer 56 ft

In winter an iron pipe feel colder than a wooden window . This is because wood is_______?


aConductor


bNon-Conductor


cSemi- Conductor


dNot a solid while iron is a solid


View Answer Non-Conductor

Water is heated in a kettlE. The inside water is heated by convection. A person sitting near the fire receives heat by ________?


aConduction


bConvection


cRadiation


dReflection


View Answer Radiation

Name the famous book of Ibn-Sina in which he discussed human physiology and medicine ?


aAl-Qanun


bAl-Masudi


cNew Renaissance


dTadhkira


View Answer Al-Qanun

In a railway track, two rails are joined end to end with a gap tin between them because?


aSteel can be saved


bAccidents due to contraction in winter can be avoided


cAir gaps are necessary for bearing the weight of running train


dAccidents due to expansion in summer can be avoided



Animal which captures and readily kills living animals for its food is called___________?


aParasite


bScavenger


cPredator


dMammal


View Answer Predator

The fruits without seed, like banana, are called_____________?


aSeedless fruits


bParthenogenesis fruits


cParthenocarpic fruits


dplacental fruits


View Answer Parthenocarpic fruits

Quartz crystal in quartz watches work on the principle called?


aPhotoelectric effect


bStark effect


cThermionic effect


dPiezo-electric effect


View Answer Piezo-electric effect

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