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The slope of the tangent drawn on veloci...

The slope of the tangent drawn on velocity-time graph at any instant of time is equal to the instantaneous

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Asserion : The acceleration of an object at a particular time is the slope of the velocity-time graph at that instant of time. Reason : For uniform motion acceleration is zero.

For a moving body at any instant of time

Draw areal velocity time graph for Mars.

The velocity - time graph of a particle is as shown in figure

The curve for which the slope of the tangent at any point is equal to the ration of the abcissa to the ordinate of the point is

Slope of a velocity – time graph gives

The slope of velocity-time graph for uniform motion of an object is

The area under velocity-time graph for a particle in a given interval of time represnets

Graphs are very useful to represent a physical situation. Various quantities can be easily represented on graphs and other quantites can be determined from the graph. For example the slope of velocity-time graph represents instantaneous acceleration. For a motion with constant acceleration slope of velocity-time graph is constant. If acceleration is changing with time, slope will change and thus velocity-time graph will be a non-linear curve. Further the area of velocity-time graph gives displacement. For the given velocity-time graph the possibly correct acceleration-time relationship is

Graphs are very useful to represent a physical situation. Various quantities can be easily represented on graphs and other quantites can be determined from the graph. For example the slope of velocity-time graph represents instantaneous acceleration. For a motion with constant acceleration slope of velocity-time graph is constant. If acceleration is changing with time, slope with change and thus velocity-time graph will be a non-linear curve. Further the area of velocity-time graph gives displacement. The velocity-time graph for two objects P and Q are shown. The ratio of their respective acceleration is

CENGAGE CHEMISTRY ENGLISH-CHEMICAL KINETICS-Exercises True/False
  1. For a zero order reaction, The rate becomes double when the concentrat...

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  2. For a zero order reaction, the half-life periof is independent of the ...

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  3. x g of a radioactive substance will be decomposed to 7//8x g in 40 s i...

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  4. For a first order reaction, the half-life periof is 0.263 k. T or F

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  5. The sum of powers to which of the concentration terms are raised in th...

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  6. The difference between the energy maximum along a reaction path and th...

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  7. The graph between log k versus 1//T is a straight line.

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  8. The slope of the tangent drawn on velocity-time graph at any instant o...

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  9. A poistive catalyst increases the activation energy of the reaction.

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  10. The slope of straight line in a plot of log.[A] versus time for a firs...

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  11. The rate of reaction increases with increase in activation energy.

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  12. The average rate and instantaneous rate are the same. T or F

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  13. Longer the reaction life time, faster is the reaction. T or F

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  14. A mixture of reactants may be thermodynamically unstable but kinetical...

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  15. The rate constant of a specific reaction is independent of the concent...

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  16. The order of reaction can never be zero.

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  17. In a gaseous reaction, an increase in the pressure of the reactant gas...

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  18. The hydrolyiss of ethyl acetate in the pressure of sofium hydroxide is...

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  19. The unit of rate constant for a zero order reaction is s^(-1).

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  20. In a second order reaction, the plot of 1//(a-x) versus t is a straigh...

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