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Question 1

Match List I with List II
List - I                        List - II
A. Surface tension       I. kg m$$^{-1}$$ s$$^{-1}$$
B. Pressure                 II. kg m s$$^{-1}$$
C. Viscosity                III. kg m$$^{-1}$$ s$$^{-2}$$
D. Impulse                  IV. kg s$$^{-2}$$
Choose the correct answer from the options given below:

We need to match each physical quantity with its correct SI unit.

A. Surface Tension

Surface tension = Force per unit length = $$\frac{\text{N}}{\text{m}} = \frac{\text{kg} \cdot \text{m/s}^2}{\text{m}} = \text{kg s}^{-2}$$

This matches IV: kg s$$^{-2}$$.

B. Pressure

Pressure = Force per unit area = $$\frac{\text{N}}{\text{m}^2} = \frac{\text{kg} \cdot \text{m/s}^2}{\text{m}^2} = \text{kg m}^{-1}\text{s}^{-2}$$

This matches III: kg m$$^{-1}$$ s$$^{-2}$$.

C. Viscosity (Dynamic)

Viscosity = Pressure $$\times$$ Time = Pa $$\cdot$$ s = kg m$$^{-1}$$ s$$^{-2}$$ $$\times$$ s = kg m$$^{-1}$$ s$$^{-1}$$

This matches I: kg m$$^{-1}$$ s$$^{-1}$$.

D. Impulse

Impulse = Force $$\times$$ Time = N $$\cdot$$ s = kg $$\cdot$$ m/s$$^2$$ $$\times$$ s = kg m s$$^{-1}$$

This matches II: kg m s$$^{-1}$$.

Summary: A-IV, B-III, C-I, D-II

The correct answer is Option B.

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