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A barometer with a brass scale correct a...

A barometer with a brass scale correct at `0^(@)C` reads 70 cm of mercury on a day when the air temperature is `40^(@)C`. The correct reading at `0^(@)C` is (Coefficient of real expansion of mercury is `0.00018//^(@)C` and the coefficient of linear expansion of brass is `0.000018//^(@)C`.

A

60.5 cm

B

69.5 cm

C

20.5 cm

D

50.00 cm

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The correct Answer is:
B
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AAKASH SERIES-THERMAL PROPERTIES OF MATTER-EXERCISE-2
  1. Densities of a liquid at 30^(@)Cand80^(@)C are 0.6gm/c.c and 0.54 gm/c...

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  2. The value of coefficient of volume expansion of glycerine is 5xx10^(-4...

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  3. A barometer with a brass scale correct at 0^(@)C reads 70 cm of mercur...

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  4. The density of a liquid of coefficient of cubical expansion gamma" is ...

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  5. The apparent change in volume of a liquid per 100^(@)C is 8%. Then coe...

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  6. If the coefficient of real expansion gamma(r) is 1% more then coeffici...

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  7. The volume of a gas at 20^(@)C is 100 CC at normal pressure when it is...

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  8. If a given mass of a gas occupies a volume 100 cc at one atmospheric p...

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  9. A litre of air is heated from 27^(@)C to 177^(@)C at constant pressure...

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  10. The pressure of a given mass of gas at 27^(@)C is 75 cm of mercury. Fi...

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  11. A gas at 27^(@)C and pressure of 30 atm is allowed to expand to atmosp...

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  12. If an air bubble rises from the bottom of a mercury tank to the top it...

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  13. How much should the pressure be increased in order to decrease the vol...

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  14. If the pressure of an ideal gas contains in a closed vessel is increas...

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  15. A given amount of a gas is heated till the volume and pressure both in...

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  16. At constant pressure, the ratio of increase in volume of an ideal gas ...

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  17. Two samples of Hydrogen and Oxygen of same mass possess same pressure ...

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  18. The volume occupied by 8gm of oxygen at S.T.P is

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  19. Two gases A and B having same pressure p, volume V and absolute temper...

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  20. A vessel is filled with an ideal gas at a pressure of 20 atm and is at...

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