Answer: 5
Explanation: pH is defined as potential of hydrogen electrode and measures the acidity or alkalinity of a substance.
It is calculated by taking negative logarithm of 
ion concentration.
![pH=-log[H^+]=-log[0.00001]=-log[10^{-5}]=-(-5)log[10]=5](https://tex.z-dn.net/?f=pH%3D-log%5BH%5E%2B%5D%3D-log%5B0.00001%5D%3D-log%5B10%5E%7B-5%7D%5D%3D-%28-5%29log%5B10%5D%3D5)
Thus the given solution has pH of 5 which means this is an acidic solution.
Answer :
Saturated hydrocarbon : 3-methyloctane, propane, heptane.
Unsaturated hydrocarbon : cyclopentene, heptyne
Explanation :
Saturated hydrocarbon : These are those hydrocarbons in which all carbon atoms and hydrogen atoms are bonded together with single bonds.
For example : Methane, Ethane, etc.
Unsaturated hydrocarbon : These are those hydrocarbons in which carbon-carbon atom bonded together with double or triple covalent bonds.
For example : Ethene, Butyne, etc.
Therefore, the saturated and unsaturated hydrocarbons are:
Saturated hydrocarbon : 3-methyloctane, propane, heptane.
Unsaturated hydrocarbon : cyclopentene, heptyne
Answer number 2 is correct
A substance that increases hydroxide ions in a solution
correct me if i’m wrong .
