Which substance Cannot be broken down by a chemical change?

Which substance Cannot be broken down by a chemical change?

Elements are those pure substances that cannot be decomposed by ordinary chemical means such as heating, electrolysis, or reaction. Gold, silver, and oxygen are examples of elements. Compounds are pure substances formed by the combination of elements; they can be decomposed by ordinary chemical means.

Can ammonia be decomposed chemically?

Well, certainly water and ammonia can be decomposed by chemical change……..

What can a chemical change break down?

Compounds can be broken down into smaller compounds, or their basic elements, by chemical change. Sometimes this chemical change requires energy in the form of heat or electricity. For example, heat can be used to break down mercuric oxide into the elements mercury and oxygen.

Is breaking down a physical or chemical change?

Chemical change is characterized by the formation of new substances, and the making and breaking of strong chemical bonds. Decomposition of a compound into its elemental constituents certainly falls under this umbrella. Therefore, you are quite correct to designate this transition as a chemical change.

Which of the following substance Cannot be broken down by a chemical method a ammonia NH3 B helium He C Methane ch4 D water h2o?

Elements are chemically the simplest substances and hence, cannot be broken down using chemical methods. But Ammonia, methane and water are compounds that can be decomposed further into their elements.

Is ammonia an element?

Ammonia, NH3, is a chemical compound composed of one nitrogen atom and three hydrogen atoms. Ammonia is a colorless gas that is lighter than air, and can be easily liquefied. Ammonia is a compound normally encountered as a gas and has a strong odor.

How does ammonia break down?

Ammonia readily dissolves in water. Decomposition of ammonia is a slightly endothermic process requiring 23 kJ/mol (5.5 kcal/mol) of ammonia, and yields hydrogen and nitrogen gas. Ammonia can also be used as a source of hydrogen for acid fuel cells if the unreacted ammonia can be removed.

Why ammonia can be decomposed by a chemical change?

(1) Ammonia is composed of one nitrogen and three hydrogen atoms so it is a compound. Therefore it can be broken down by chemical change.

Which is not broken down by a chemical change?

Potassium can’t be broken down by chemical change because it’s an element, which is the simplest form of matter. Sulfuric acid, ammonia and water are all compounds composed of elements.

Can a compound be broken down into simpler elements?

Sulfuric acid, ammonia and water are all compounds composed of elements. Compounds can be broken down into simpler compounds or elements by a chemical reaction. You can tell if a substance is an element or compound by its chemical formula.

What is a substance that cannot be chemically broken down?

The substance that cannot be broken down by a chemical reaction is argon. This is because the substance is an element, otherwise if this is a compound, then it can be still broken down by chemical means.