It is flammable
The observation that hydrogen chloride is a gas at room temperature is a PHYSICAL property.
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.
"This gas" is hydrogen, correct? The property that contributed to the Hindenburg Disaster is flammability.
1.Action with litmus
it is is one of the property of hydrogen as it is highly inflammable gas ever known . it is also used in hydrogen bombs.
Flammability. Hydrogen will burn (combust, oxidize) in oxygen, producing heat and water.
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.
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.
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.
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.
Hydrogen typically does not exhibit luster in its natural state since it is a colorless and odorless gas. Luster is a property associated with the shine or reflective quality of a material's surface, which is not applicable to gaseous hydrogen.