1. II.
Magnesium hydroxide and nitric acid (HN2O) react to produce magnesium nitrate
and water. (2)
Aluminium bromide and chlorine react to produce aluminium chloride and
bromine. (2)
Sodium phosphate and calcium chloride reacts to produce calcium phosphate
and sodium chloride. (2)

yes

explanation:

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definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.