A black powder is placed in a long glass tube and hydrogen gas is passed into the tube so that hydrogen sweeps out all other gases. The powder is heated with Bunsen burner. It turns into red-orange and water vapour can be seen condensing at the tip of the tube. The red-orange colour remains after the tube is cooled. The original black substance is an element or not has to be explained.
A black powder is placed in a long glass tube and hydrogen gas is passed into the tube so that hydrogen sweeps out all other gases. The powder is heated with Bunsen burner. It turns into red-orange and water vapour can be seen condensing at the tip of the tube. The red-orange colour remains after the tube is cooled. The original black substance is an element or not has to be explained.
Solution Summary: The author explains that a black powder is heated with Bunsen burner and hydrogen gas is passed into the tube so that hydrogen sweeps out all other gases. The original black substance is not an element.
A black powder is placed in a long glass tube and hydrogen gas is passed into the tube so that hydrogen sweeps out all other gases. The powder is heated with Bunsen burner. It turns into red-orange and water vapour can be seen condensing at the tip of the tube. The red-orange colour remains after the tube is cooled.
The original black substance is an element or not has to be explained.
(b)
Interpretation Introduction
Interpretation:
A black powder is placed in a long glass tube and hydrogen gas is passed into the tube so that hydrogen sweeps out all other gases. The powder is heated with Bunsen burner. It turns into red-orange and water vapour can be seen condensing at the tip of the tube. The red-orange colour remains after the tube is cooled.
The new red-orange substance is an element or not has to be explained.
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