Science

Q.1. The fact that universe is expanding was discovered by
A. Hahn
B. Hubble
C. Rontgen
D. Rutherford
Ans. Hubble



Q.2. Which is the largest excretory organ of the body
A. Lungs
B. Skin
C. Liver
D. None of these
Ans. Skin



Q.3. Water potential of pure water is
A.  Zero
B. One
C. Negative
D. Two
Ans. Zero




Q.4. 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
Ans. 15,000 to 20,000



Q.5. A camera uses a _____ to form an image.
A. Convex lens
B. Concave lens
C. Condenser lens
D. None of these
Ans. Convex lens



Q.6. Biosensor is used to measure?
A. Blood glucose level
B. The body pH value
C. Amount of hemoglobin
D. Salinity in Urine
Ans. Blood glucose level



Q.7. The diameter of the Earth’s equator is larger than the pole-to-pole diameter by
A. 40 km
B. 43 km
C. 46 km
D. 49 km
Ans. 43 km



Q.8. The mass is highly concentrated form of
A. Weight
B. Energy
C. Force
D. Momentum
Ans. Energy



Q.9. The Earth’s internal heat mainly comes from
A. Liquid hydrogen
B. Chemical reactions
C. Radioactive decay
D. Molecular kinetic energy
Ans. Radioactive decay



Q.10. Laser was invented by
A. Volta
B. Sturgeon
C. Hero
D. Maiman
Ans. Maiman

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