Answer:
An aldehyde is a carbonyl group with a carbonyl carbon bonded to hydrogen and can be oxidized to a ketone while a ketone is a carbonyl group with a carbonyl carbon only bonded to oxygen atom and cannot be oxidized
Some of oxidizing agents are potassium dichromates, bradys reagent....

Explanation:
CO2 is called as gas because it exist in single thermodynamics state i.e CO exist in gases state only at room temperature.
Answer : The pH of a solution is, 7.28
Solution : Given,
Concentration of hydronium ion,
= 
pH : It is defined as the negative logarithm of hydronium ion concentration or hydrogen ion concentration.
![pH=-\log [H_3O^+]](https://tex.z-dn.net/?f=pH%3D-%5Clog%20%5BH_3O%5E%2B%5D)
Now put the value of hydronium ion concentration in this expression, we get the pH of the solution.

Therefore, the pH of a solution is, 7.28
Hydroxide ions (OH-) greatly increases in number and or concentration, number within a given volume, when a base is dissolved in water. This explanation proposes the Arhennius definition of a base.