Pressure

Q.

What is meant by aqueous tension ? How is the pressure exerted by a gas corrected to account for aqueous tension?

Q.

a punctured tyre becomes flat more easily in summer than in winter .why?

Q. Question 3 (b)
Give reasons
(b) A gas exerts pressure on the walls of the container.

Q.

What tool is used to measure gas pressure?

Q.

Which of the following relations for expressing volume of a sample is not correct?

1. 1L=10³ ml

2. 1 dm³=1L

3. 1L=10³ m³

4. 1L=10³ cm³

Q. Q1. a glass bulb is connected to an open limb manometer. The level of mercury in both the limbs of the manometer was same. The bulb was heated to 57C. If the room temperature and atmospheric pressure were 27C and 750 mm, the difference of levels in the two limbs now will be : A. 2.5 cm B. 5.0 cm C. 7.5 cm D. 10.0 cm Q2. Air vessel at 127C is heated until 1/5th of air in it has been expelled. Assuming that the volume of vessel remains constant the temperature to which the vessel has been heated is A. 177C B. 277C C. 377C D. 227C

Q. Match the terms with their respective constant parameters.

1. Temperature
2. Pressure
3. Volume

Q.

One atmosphere is numerically equal to approximately

1. 10⁶ dynes cm^-2

2. 10² dynes cm^-2

3. 10⁴ dynes cm^-2

4. 10⁸ dynes cm^-2

Q.

A gas exerts pressure on the walls of the container. Give reasons. [3 MARKS]

Q. $\text{FeO (aq) + HCl (aq)}\to {\text{X + H}}_2\text{O (l)}$

In the reactin given above, the salt formed is _______.

[1 Mark]

Q.

Pressure of a gas in a vessel can be measured by

1. Barometer

2. Stalgometer

3. Manometer

4. All the baove

Q. $50$ $c{m}^3$ of hydrogen is collected over water at ${17}^o$C and $750$ mm Hg pressure. Calculate the volume of dry gas at S.T.P.

1. $45.58c{m}^3$
2. $65.58c{m}^3$
3. $55.58c{m}^3$
4. $35.58c{m}^3$

Q.

One atmosphere is approximately = ___

1. 10⁸ dynes cm^-2

2. 10⁶ dynes cm^-2

3. 10² dynes cm^-2

4. 10⁴ dynes cm^-2

Q.

explain me different types of barometer

Q. "Pressure exerted by saturated water vapour is called aqueous tension". What correction term will you apply to the total pressure to obtain the pressure of dry gas?