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

elements make up everything, and they combine to make compounds.

the answer is c

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.