A. Increasing the temperature of water B. Reacting chemically with dirt C. Reducing the surface tension of water D. Dissolving dirt The correct answer to the question: “Detergents dissolved in water help in cleaning clothes by_________?” is “Reducing the surface tension of water”.
A. Viscosity of ink B. Capillary action phenomenon C. Diffusion of ink through the blotting D. Siphon action The correct answer to the question: “The absorption of ink by blotting paper involves__________?” is “Capillary action phenomenon”.
A. Surface tension B. Viscosity C. Specific gravity D. Elasticity The correct answer to the question: “Materials for rain-proof coats and tents owe their water proof properties to________?” is “Surface tension”.
A. An accelerated motion B. No acceleration at all C. Uniform acceleration D. Uneven acceleration The correct answer to the question: “A satellite moving round the earth with a uniform speed has____________?” is “Uniform acceleration”.
A. A binocular B. A camera C. An epidiascope D. A stereoscope The correct answer to the question: “For being able to see three-dimensional pictures we have to use_________?” is “A stereoscope”.
A. 0°C B. 4°C C. 4° K D. 4.8°C The correct answer to the question: “Water has maximum density at____________?” is “4°C”.
A. Einstein B. Newton C. Gahleo D. Hubble The correct answer to the question: “The theory of Expanding Universe was first propounded by____________?” is “Hubble”.
A. Lactometer B. Hygrometer C. Manometer D. Sonometer The correct answer to the question: “An instrument to detect the purity of milk is____________?” is “Lactometer”.
A. Velocity B. Temperature C. Mass D. None OF These The correct answer to the question: “Coulomb is the scientific unit to measure?” is “None OF These”.
A. Albert Einstein B. John Kepler C. Galileo Galilie D. None The correct answer to the question: “Who proposed this concept “All motion is relative”?” is “Albert Einstein”.