Question

two jars of hydrogen are collected ;one burns quietly and other doesn't ?

Answer 1

because hydrogen make a pop sound while burning

Answer 2

When two jars of hydrogen are collected, one burns quietly whereas the other doesn't because pure hydrogen burns whereas impure hydrogen don't burn.

• While collecting gases, the utmost sterility must be ensured. It is because contaminants and pollutants may react with the gas and may alter the physical and chemical properties of the gas.
• In the given scenario, the same hydrogen gas is collected in two jars. When the two jars are tested with fire, it was observed that one jar burns quietly whereas the other doesn't.
• The reason for the burning of one jar is that it is composed of pure hydrogen gas due to which it burns quietly.
• On the other hand, the other jar doesn't burns at all because it may contain impurity which may inhibit the gas to burn.

Learn more about such concept

A brown substance x on heating in air forms a substance y when hydrogen gas is passed over heated y it again changes back into x

A) name the substance x and y.

B) name the type of chemical reaction occurring both the changes.

C) write the chemical equation of the reaction.

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A reddish brown metal x when heated in presence of oxygen forms a black compound y which is basic in nature when heated with hydrogen gas gives back y. identify x and y . write the chemical equation between y and h2. identify the substances which are oxidized and reduced

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