Everyday Science Everyday Science 1 / 10 A solid piece of iron sinks in water but floats in mercury. This is because the Density of iron is more than that of water but less than that of mercury Average density of water and mercury is less than that of iron Density of iron is less than that of water as well as mercury Density of iron is more than that of water as well as mercury 2 / 10 The toxin is a poisonous substance produced by some higher plants certain animals pathogenic bacteria all of these 3 / 10 Excessive secretion from the pituitary gland in children results in increased height retarded growth weakening of bones none of the above 4 / 10 The three abundant elements in the earth’s crust are oxygen, aluminum, and silicon. The correct order of their abundance is oxygen, aluminum, silicon aluminum, silicon, oxygen oxygen, silicon, aluminum silicon, oxygen, aluminum 5 / 10 The same side of the Moon always faces the earth because The period of revolution of the moon is equal to the period of rotation Earth moves with the same speed It is natural phenomenon Moon cannot change its position 6 / 10 A drop of water or mercury on a clean glass plate is circular in shape. Why? A small drop does not have viscosity Surface tension in the case of a drop is greater which makes its surface minimum and so spherical Molecules of a drop remain cohered together None of these 7 / 10 A saturated solution of a solute at a particular temperature is one which contains As much solute as it can dissolve at the temperature in the presence of the crystals of the solute As much solute as it can dissolve at the temperature in the presence of the crystals of the solvent As much solvent as it can dissolve at the temperature in the presence of the crystals of solvent None of these 8 / 10 It takes longer to cook potatoes on the hills than in plains because Atmospheric pressure is low on the hills Atmospheric pressure is more on the hills Hilly potatoes are very hard None of these 9 / 10 Why do diamonds shine at night? It is because of their various surfaces that reflect even the faintest light available to them. It is because the light that enters into a diamond is strongly reflected successively owing to high refractive index both a and b none of the above 10 / 10 Why does the sky look blue? Combination of various lights produce blue colour The scattering of light by dust particles or air molecules Absorption of the blue colour of the spectrum by the dust particles and water vapour None of these Your score isThe average score is 0% LinkedIn Facebook Twitter VKontakte 0% Restart quiz
