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

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dQuality

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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

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cThermionic effect

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dPiezo-electric effect

✓


View Answer Piezo-electric effect

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