81. Which of the following is not a property of heavy water ?
82. Which of the following liquids is most viscous?
83. Small bubbles are perfectly spherical because of
84. Pitot tube is used to measure
85. A spherical ball made of steel when dropped in mercury container
86. If cream is removed from milk, its density
87. A falling drop of rain water acquires the spherical shape due to
88. Why the needle of iron swims on water surface when it is kept gently ?
89. Rise of oil a wick is due to
90. Bubbles of air rise up through liquids due to
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