Science Questions and Answers 

1.Scent sprayer is based on:
 A. Charles’s law
 B. Boyle’s law
 C. Archimedes’ principle
 D. Bernoulli’s principle
 
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2.Which of the following instruments measures blood pressure?
 A. Spherometer
 B. Stethoscope
 C. Sphygmomanometer
 D. Ammeter
 
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3.Which mirror is used as a rear view mirror in the vehicles?
 A. Plane
 B. Convex
 C. Concave
 D. Plano concave
 
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4.When ice melts, then the:
 A. volume increases
 B. volume decreases
 C. mass increases
 D. mass decreases
 
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5.Which of the following is the smallest unit of length?
 A. Micrometre
 B. Nanometre
 C. Angstrom
 D. Fermimetre
 
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6.What is the source of electrical energy in an artificial satellite?
 A. Solar cell
 B. Mini nuclear reactor
 C. Dynamo
 D. Thermopile
 
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7.The mirror used by a dentist to examine the teeth of patients is:
 A. Concave
 B. Convex
 C. Plane
 D. Cylindrical
 
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8.Which one of the following chemicals helps in fruit ripening?
 A. Ethephon
 B. Atrazine
 C. Isoproturan
 D. Malathion
 
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