B. Write True or false for the following statements :
1. Aqueous tension is the actual pressure of the gas.
2. Thermal decomposition can be carried out by supplying heat energy.
3. Sodium carbonate are stable to heat. 4. The number of carbon atoms in a hydrogen carbonate radical is 4.
5. Gases have very high density.
Answers
Answer:
"1. Aqueous tension is defined as, “the partial pressure of the water vapour that is present in the moist gas”. The pressure exerted by moist gas is equal to the sum of partial pressure of dry vapour and moist vapour. This partial pressure exerted by water vapours is known as aqueous tension.
2. This heat energy supplied will be used for breaking down the chemical bonds in that compound. Hence, to bring about thermal decomposition of a compound energy must be supplied from outside. Hence, thermal decomposition of a compound is an endothermic reaction.
3. One common reaction of any metal carbonates is known as thermal decomposition. When metal carbonates are heated, they break down to form the metal oxide and carbon dioxide gas. ... This means that sodium carbonate is very stable and requires a high temperature to decompose.
4. There will only be 1 CARBON ATOM in hydrogen carbonate.
5. Gases are less dense than solids and liquids because their molecules are far apart in comparison to solids and liquids. ... The greater the volumemass, the more dense the material is. Because the molecules of a gas are spread apart, they have the least volumemass, and are therefore less dense."