Science Practice

Instant answers and explanations after every question.

Q1Science
Stainless steel is an alloy of iron mainly with which metals?
AChromium and nickelBCopper and zincCTin and leadDAluminium and magnesium
Q2Science
Which is the hardest tissue in the human body?
ABoneBDentinCEnamelDCartilage
Q3Science
Which device is used to convert alternating current (AC) into direct current (DC)?
ARectifierBTransformerCInverterDGalvanometer
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Q4Science
One watt, the SI unit of power, is equal to:
AOne joule per secondBOne joule per coulombCOne coulomb per secondDOne newton per metre
Q5Science
In a metal wire carrying a direct current, in which direction do the electrons flow relative to the conventional current?
AIn the same directionBIn the opposite directionCPerpendicular to itDAlternately in both directions
Q6Science
Night blindness is caused by the deficiency of which vitamin?
AVitamin ABVitamin CCVitamin DDVitamin K
Q7Science
What is the approximate speed of light in vacuum?
A3 × 10^8 m/sB3 × 10^6 m/sC3 × 10^5 m/sD3 × 10^10 m/s
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Q8Science
Which acid is used in car batteries?
ASulphuric acidBNitric acidCHydrochloric acidDPhosphoric acid
Q9Science
According to the law of reflection, the angle of incidence is equal to which angle?
AAngle of refractionBCritical angleCAngle of reflectionDAngle of deviation
Q10Science
About how much energy is released in a typical nuclear fission event?
A2 MeVB20 MeVC200 MeVD2000 MeV