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Chapter 8: Problem 33

With increase in temperature, the viscosity of (A) both gases and liquids increases. (B) both gases and liquids decreases. (C) gases increases and of liquids decreases. (D) gases deceases and of liquids increases.

Short Answer

Expert verified
Therefore, option (C) gases increases and of liquids decreases, is the correct answer.

Step by step solution

01

Analyze the statement

Firstly, you must be aware of the terminology used in this exercise. Viscosity is a measure of a fluid's resistance to flow. It describes the internal friction of a moving fluid. A fluid with large viscosity resists motion because its molecular makeup gives it a lot of internal friction. A fluid with low viscosity flows easily because its molecular makeup results in very little friction when it is in motion.
02

Understand the properties of gases and liquids

Due to the looser molecular structure of gases, when temperature increases, the average kinetic energy of the molecules increases as well. This leads to more molecular collisions and therefore, increased internal friction - hence, viscosity increases. Contrarily, in liquids, the molecules are more tightly packed, and an increase in temperature provides those molecules with more energy for movement, resulting in a decrease in resistance to flow - hence, viscosity decreases.
03

Match the findings to the given options

Once the behavior of gases and liquids with respect to temperature is understood, you can match the findings to the options provided. From the analysis, it can be concluded that with an increase in temperature, viscosity of gases increases whilst that of liquids decreases.

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Most popular questions from this chapter

A pendulum made of a uniform wire of cross-sectional area \(A\) has time period \(T\). When an additional mass \(M\) is added to its bob, the time period changes to \(T M\). If the Young's modulus of the material of the wire is \(Y\), then \(\frac{1}{Y}\) is equal to \((g=\) gravitational acceleration) \(\quad[\mathbf{2 0 1 5}]\) (A) \(\left[\left(\frac{T_{M}}{T}\right)^{2}-1\right] \frac{M g}{A}\) (B) \(\left[1-\left(\frac{T_{M}}{T}\right)^{2}\right] \frac{A}{M g}\) (C) \(\left[1-\left(\frac{T}{T_{M}}\right)^{2}\right] \frac{A}{M g}\) (D) \(\left[\left(\frac{T_{M}}{T}\right)^{2}-1\right] \frac{A}{M g}\)

If the terminal speed of a sphere of gold (density = \(19.5 \mathrm{kgm}^{-3}\) ) is \(0.2 \mathrm{~ms}^{-1}\) in a viscous liquid (density \(=\) \(1.5 \mathrm{kgm}^{-3}\) ), find the terminal speed of a sphere of silver (density \(=10.5 \mathrm{~kg} / \mathrm{m}^{-3}\) ) of the same size in the same liquid. [2006] (A) \(0.4 \mathrm{~ms}^{-1}\) (B) \(0.133 \mathrm{~ms}^{-1}\) (C) \(0.1 \mathrm{~ms}^{-1}\) (D) \(0.2 \mathrm{~ms}^{-1}\)

Water rises in a capillary tube to a certain height such that the upward force due to surface tension is balanced by \(75 \times 10^{-4} \mathrm{~N}\), force due to the weight of the liquid. If the surface tension of water is \(6 \times 10^{-2} \mathrm{~N} / \mathrm{m}\), the inner circumference of the capillary must be (A) \(1.25 \times 10^{-2} \mathrm{~m}\) (B) \(0.50 \times 10^{-2} \mathrm{~m}\) (C) \(6.5 \times 10^{-2} \mathrm{~m}\) (D) \(12.5 \times 10^{-2} \mathrm{~m}\)

Which of the following has greatest viscosity? (A) Hydrogen (B) Air (C) Water (D) Ammonia

The pressure just below the meniscus of water (A) is greater than just above it. (B) is lesser than just above it. (C) is same as just above it. (D) is always equal to atmospheric pressure.
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