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Chapter 4: Problem 9
The viscosity of which liquid is highest? (a) Water (b) Glycol (c) Acetone (d) Ethanol
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If \(\eta_{1}\) and \(\eta_{2}\) are coefficients of viscosity of two liquids, \(d_{1}\) and \(d_{2}\) are their densities and \(t_{1}\) and \(t_{2}\) are their flow times in an Ostwald's viscometer then (a) \(\frac{\eta_{1}}{\eta_{2}}=\frac{d_{1} t_{2}}{d_{2} t_{1}}\) (b) \(\frac{\eta_{1}}{\eta_{2}}=\frac{d_{2} t_{2}}{d_{1} t_{1}}\) (c) \(\frac{\eta_{1}}{\eta_{2}}=\frac{d_{1} t_{1}}{d_{2} t_{2}}\) (d) \(\frac{\eta_{1}}{\eta_{2}}-\frac{d_{2} t_{1}}{d_{1} t_{2}}\)
For any liquid, the number of drops formed per unit volume depends on (a) viscosity (b) surface tension (c) pressure (d) none
Mark the statement which is correct: (a) Surface tension of a liquid increases with temperature. (b) Addition of chemicals reduces the surface tension of a liquid. (c) Stalgmometer is used for measuring viscosity of the liquid. (d) Viscosity of a liquid does not depend on intermolecular forces.
With increase in temperature, the fluidity of liquids: (a) increases (b) decreases (c) remains constant (d) may increase or decrease
Water boils at lower temperature on high altitudes because (a) atmospheric pressure is low there (b) atmospheric pressure is high there (c) water is weakly hydrogen bonded there (d) water in pure form is found there
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