Weigh accurately between 9,8 and 10g of ferrous ammonium sulphate into a 250cm volumetric flask and dissolve it in a little deionised water. Add about 50cm' of 2M H,80 (Sulphuric acid) and
make it up to the mark. Pipette 25cm' portion of this solution into a conical flask. Titrate this with
the given potassium permanaganate solution. No indicator is required. The appearance of a
permanent pink colour of Mno, in the solution is the end point.
CALCULATIONS:
Determine the Concentration of the potassium permanganate in (a) molarity (b) g/dm'.​

b. atoms in metallic solids are not arranged in a regular pattern

explanation:

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.

catya your not at all which answer i've seen you do this on another question!