Measurement of Atmospheric Pressure

Q.

Which of the following equals 1 atm pressure?

1. 860 cm of Hg

2. 86 cm of Hg

3. 76 cm of Hg

4. 760 cm of Hg

Q. Name any two instruments that can be used to measure pressure?

Q.

Name the device which is use to measure pressure difference?

Q.

Describe a pycnometer.

Q.

Assuming the density of air to be $1.295kg/m^3$, find the fall in the barometric height in mm of Hg at a height of 107 m above sea level. Take density of mercury = $13.6\times {10}^{3}kg/m^3$.

Q. Explain working principle of mercury barometer.

Q.

Mercury is used in a barometer because it has the ____________ density for a liquid.

Q. The magnitude of atmospheric pressure is equal to the pressure exerted by a tall column of mercury.

1. 76 mm
2. 760 mm
3. 760 cm

Q.

What will happen if there are air bubbles in the tube of barometer?

1. It will add more unwanted pressure

2. Mercury will begin to get heated

3. It will decrease pressure

4. Mass of mercury will decrease

Q. At normal room temperature, atmospheric pressure is less than 76 cm of Hg. True/False

1. True
2. False

Q. Which of the following is the correct order of atmospheric pressure of Earth's atmosphere?

1. Stratosphere < Troposphere < Mesosphere
2. Troposphere < Stratosphere < Mesosphere
3. Mesosphere < Troposphere < Stratosphere
4. Mesosphere < Stratosphere < Troposphere

Q.

List four parameters of comparison between mercury and water as barometric liquid.

Q.

Air moves from a region of _______ pressure to a region of ________ pressure.

Q.

Advantages of mercury include:

1. It is opaque therefore, apt readings can be taken.

2. It slides easily on glass

3. It is less dense than water

4. It is transparent

Q. If the air bubbles are introduced into the barometer tube then the height of the mercury column will .

1. increase
2. decrease
3. remain the same

Q.

At standard temperature, atmospheric pressure is less than $76cm$ of Hg.

1. False

2. True

Q.

Atmospheric pressure at a place is measured by a

1. Odometer

2. Barometer

3. Galvanometer

4. Speedometer

Q.

Why is mercury preferred as a barometric liquid over water?

Q. An instrument used to measure the atmospheric pressure is called _______.

Q. Apparatus used to measure atmospheric pressure is :

1. centrifuge
2. barometer
3. balance
4. calorimeter
5. battery

Q. The instrument that measures atmospheric pressure is called a:

1. Speedometer
2. Odometer
3. Barometer
4. Thermometer

Q. 'The atmospheric pressure at a place is $76cm$ of $Hg$? State its value in $bar$.

1. $1.013\times {10}^5$ $bar$
2. $1bar$
3. $1.013\times {10}^{-5}$ $bar$
4. None

Q.

Which of the following barometer can be used as an altimeter?

1. Both A and B

2. Simple barometer

3. Fortin’s barometer

4. Aneroid barometer

Q.

a piece of iron weighs 44.5gf in air, 39.5gf in water 40.3gf in parrafin oil. find density of iron density of paraffin oil.

a solid of density 5000kgm³ weighs 0.5kgf in air. if it floats in a liquid of density 8000kgm³, what is its apparent weight?

Q. ______ is used as barometric liquid as it does not vaporise under vacuum condition.

1. water
2. Mercury
3. air
4. petrol

Q. Atmospheric pressure with an increase in altitude.

1. increases
2. decreases
3. remains unchanged

Q. At sea-level, atmospheric pressure is

1. $76cmofHg$ column
2. $0.76cmofHg$ column
3. $76mofHg$ column
4. $76cmofwater$ column