At room temperature, which of the following is usually in a different physical state than the other three? water, milk, orange juice, or oxygen

At room temperature water, milk and lemon juice are liquid while oxygen is gas.

Explanation:

The substances are liquid at room temperature if their normal melting points are lower than room temperature.

The melting point of oxygen is -218°C and boiling point is -189 °C that's why it is gas at room temperature.

Oxygen is diatomic gas O₂.

It is colorless and odor less.

The liquid and solid oxygen are pale blue in color.

It reactive with all other elements and form oxides except noble gases.

In diatomic form, under normal conditions oxygen is not harmful but in the from of ozone O₃ it is harmful if inhaled.

It is readily dissolve in a cold water.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.