Rank from most conductive to least conductive: alcl3, c6h12o6, kbr, c3h7ooh ? ?

The order is:

AlCl₃ > KBr > C₃H₇COOH > C₆H₁₂O₆

Explanation:

A compound is conducting in nature (in soluble form) if it is ionic.

More the ions produced by a compound more the conductive the compound is.

In the given compounds C₆H₁₂O₆ is non electrolytic or non ionic. It will dissolve in water and will not furnish any ion thus it will be non conducting (least)

C₃H₇COOH: It is a weak electrolyte and will dissociate very less in water and thus it will be conducting but less than a strong elecrolyte.

KBr and AlCl₃ both are ionic and will dissociate completely however AlCl₃ will produce four ions while KBr will give only two ions per molecule.

Hence AlCl₃ is more conducting

The order is:

AlCl₃ > KBr > C₃H₇COOH > C₆H₁₂O₆

c is the answer because when something is left after something evaporates that shows the chemical change.

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.