1.Action with litmus
The reaction of sodium metal with water to produce hydrogen gas is a chemical property. This is because a new substance (hydrogen gas) is formed as a result of a chemical reaction between sodium and water.
The observation that hydrogen chloride is a gas at room temperature is a PHYSICAL property.
The solubility of iron in hydrochloric acid is a chemical property, not a physical property. This reaction involves a chemical change where iron reacts with hydrochloric acid to form iron chloride and hydrogen gas is evolved.
Hydrogen is neither a chemical or physical property...it is a chemical element.
This is a chemical reaction.
No, this is a chemical property. When iron dissolves in hydrochloric acid, it undergoes a chemical reaction in which the iron atoms lose electrons and form iron(II) chloride, while hydrogen gas is evolved. This is a chemical change, not a physical change.
The chemical formula for Hydrogen gas is H2
I think you mean oxygen. However, hydrogen itself might ignite if heated enough by the splint. The chemical property is, anyway, either carbon or hydrogen's affinity with oxygen.
Hydrogen is a chemical property because it is a pure substance and it cannot be broken down into simpler substances by physical means. It is the simplest and most abundant chemical element in the universe.
The chemical formula for Hydrogen gas is H2
No, they are two separate chemical substances. A property is something you can say about a substance. For instance, a property of sodium hydroxide is that it is a strong alkali. A property of hydrogen is that it is much less dense than air. In case you were trying to ask if they undergo a chemical reaction with each other, the answer is no.
Chemical. If vinegar reacts with baking soda, a new substance is produced. If something new is produced, it is chemical. In chemical reactions, things change what they are. Water splitting into hydrogen gas and oxygen is chemical, because hydrogen gas and oxygen gas is different from water.