Tag: aluminium

$Al$ is more reactive than iron but it is less easily corroded than iron because :

A metal X reacts with aqueous NaOH solution to form Y and a highly inflammable gas. Solution Y is heated and $CO _2$ IS poured through it. Z precipitates out and $Na _2CO _3$ is formed. Z on heating gives $Al _2O _3$. Identify X, Y and Z.

Thermite is a mixture of iron oxide and ___________.

In the following reaction sequence,
$(A)+N _2 \xrightarrow { \triangle } (B) \xrightarrow {+H _2O} (C)+(D)$
white ppt. (C) is formed and gas (D) is evolved. White ppt. (C) dissolves in NaOH solution, while gas (D) gives white fumes in HCl. Thus, (A) is :

Aluminium metal gets corroded or 'rusted' in places that are near to the sea, because the oxide film that protects it:

Serving trays for tea or food, made of aluminium, often have coloured finish. These finishes are formed when an electric current in passes, which creates an oxide of aluminium layer than absorbs dyes. This is called:

Metals rust when they come in contact with oxygen of the air that forms oxides and thereby destroys the metal. Which metal forms an oxide with oxygen, that protects it from further rusting:

Which of the following materials can make cloth fire-proof?

$Al {4}C _{3} + 12H _{2}O \rightarrow 3CH _{4} + $______

$Re{O} {3}$ possess conductance and appearance like that of ____