651. What is the SI unit of charge?
A. Ampere
B. Coulomb
C. Ohm
D. Volt
E. None of these

652. Which of the following device converts chemical energy into electrical energy?
A. motor
B. generator
C. moving-coil meter
D. battery
E. None of these

653. Which gas is used in a refrigerator to cool water?
A. Nitrogen
B. Carbon dioxide
C. Methane
D. Ammonia
E. None of these

654. The average adult has a blood volume of approximately how many liters?
A. 9
B. 5
C. 8
D. 7
E. None of these

655. Which is the most abundant element in the universe?
A. Oxygen
B. Hydrogen
C. Carbon Dioxide
D. Silicon
E. None of these

656. Which is the most abundant element in the Earth’s crust?
A. Oxygen
B. Hydrogen
C. Carbon Dioxide
D. Silicon
E. None of these

657. Every day the human body breathes in how many liters of air?
A. 2,000 to 8,000
B. 10,000 to 15,000
C. 15,000 to 20,000
D. 23,000 to 28,000
E. None of these

658. Deficiency of Vitamin-D results in which of the following problems?
A. night blindness
B. rickets
C. scurvy
D. hair fall
E. None of these

659. What is the nature of Sound waves?
A. Transverse
B. Electromagnetic
C. Longitudinal
D. none of these
E. None of these

660. What is the lifespan of White Blood Cells?
A. 1 – 5 days
B. 3 – 7 days
C. 4 – 8 days
D. 5 – 21 days
E. None of these

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