Name the following ether: CH3OCH3
A. dimethyl ether
B. diethyl ether
C. ethanol
D. methyl methyl ether

Name of the ether is dimethyl ether.

Explanation:

When alkyl groups are attached to an oxygen atom then the resulting compound is known as an ether.

While writing the name of ethers the alkoxy side which is the shorter side is named first and then the other side is named.

For example, contains two methyl groups so a prefix "di" will be added to it name.

Hence, its name is dimethyl ether.

Thus, we can conclude that name of the ether is dimethyl ether.

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.