If mnso4 → mno+ so3 is not a synthesis reaction, then what type of reaction is it?

a) combustion
b) decomposition
c) double-displacement
d) single-displacement

Explanation:

A synthesis reaction is a type of chemical reaction in which two or more simple substances combine to form a more complex product.

Since there is only one reactant and it is broken into smaller components,

it is not a synthesis reaction.

A decomposition reaction is a type of chemical reaction in which one reactant yields two or more products.

Since in our question,there is one reactant and it is broken to yield two products,it is a decomposition reaction.

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.