Ms. Deepika, a science teacher demonstrated an activity in the science lab and the experiment was set up as shown in the figure.

The metal 'X' reacts with steam to form a gas 'Y' which is collected int he syringe.
Which of the following best describes the metal 'X' and gas 'Y' ?

Options

A. Metal 'X' is silver and gas 'Y' is hydrogen which burns with a pop sound.
B. Metal 'X' is sodium and gas 'Y' is carbon dioxide which gives white precipitate with lime water.
C. Metal 'X' is iron and gas 'Y' is hydrogen which burns with a pop sound.
D. Metal 'X' is magnesium and gas 'Y' is carbon dioxide which gives white precipitate with lime water.

Answer

C

Explanation

Metal `.X.+"Steam"to"Gas .Y. "`
Iron reacts with steam to give iron oxide and hydrogen gas.
`3Fe_((s))+4H_(2)O_((g))toFe_(3)O_(4(s))+4H_(2(g))`
Hydrogen gas burns with a pop sound. Silver does not react even with steam. Magnesium reacts with hot water as:
`Mg_((s))+H_(2)O_((l))toMgO_((s))+H_(2(g))`
Sodium reacts with cold water vigorously as:
`4Na_((s))+4H_(2)O_((l)) to 4NaOH_((aq))+2H_(2(g))`.