Q: A camera uses a __________ to form an image.?

A. convex lens
B. concave lens
C. condenser lens
D. none of these


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Q: The most densest substance on the Earth is __________.?

A. Platinum
B. Copper
C. Steel
D. Osmium


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Q: The SI unit of “pressure” is _________.?

A. pascal
B. joule
C. tesla
D. henry


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Q: Deficiency of Vitamin-D results in __________??

A. night blindness
B. rickets
C. scurvy
D. hair fall


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Q: Each day human body breathe in __________ liters of air.?

A. 5,000 to 10,000
B. 10,000 to 15,000
C. 15,000 to 20,000
D. 20,000 to 25,000


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Q: The most abundant element in the Earth’s crust is __________??

A. Oxygen
B. Hydrogen
C. Carbon Dioxide
D. Silicon


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Q: The most abundant element in the universe is __________.?

A. Oxygen
B. Hydrogen
C. Carbon Dioxide
D. Silicon


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Q: The average adult has a blood volume of about __________ liters.?

A. 4
B. 5
C. 6
D. 7


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Q: The gas used in a refrigerator to cool water is___________??

A. Nitrogen
B. Carbon dioxide
C. Methane
D. Ammonia


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Q: The Sun is a __________??

A. Star
B. Planet
C. Asteroid
D. Meteor


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