Of the following compounds, which would you expect to be the hardest at room temperature? srcl2 c2h6 h2o cl2

Option (a) is the correct answer.

Explanation:

Strontium chloride () is an ionic compound. And, as it is ionic in nature so there will be strong force of attraction between the two oppositely charged ions that is, and .

At room temperature, exists in solid state.

Whereas ethane () at room temperature exists as a gas.

Chemical formula of water is and at room temperature it exists in liquid state.

is a dichlorine molecule and it exists as a gas at room temperature.

Thus, we can conclude that out of the given options would you expect to be the hardest at room temperature.

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

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