Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change

Temperature change and gas produced  

Explanation:

Potassium reacts with water very fast.

The reaction is:

This is an exothermic reaction. There is release of energy or heat in the reaction. Hence a temperature change.

Also there is formation of hydrogen gas.

The solution is colorless.

There is not precipitate formation and there is no smell produced.

The solution becomes basic due to formation of KOH.

The chemical signs for the reaction of Potassium with water are the change in temperature. There won't be any release of smell or color change with no precipitate formation.

The reaction of Potassium with water takes place with the release of energy. The energy released will be the characteristic of the exothermic reaction. The reaction thereby results in the change of the temperature.

The reaction produces KOH and hydrogen gas. The hydrogen gas has been colorless and odorless gas, thereby there will not be any smell or color change. Although the formation of KOH will also be in liquid, so no precipitate has been observed.

The chemical signs for the reaction of Potassium with water are the change in temperature. There won't be any release of smell or color change with no precipitate formation.

For more information about the chemical reaction, refer to the link:

link

it's all four options.

a) the particles of the chair are strongly held together.