When aluminum reacts with hydrochloric acid, hydrogen gas (H2) is produced along with aluminum chloride (AlCl3).

The main product of the reaction between aluminum and hydrochloric acid is hydrogen gas (H2).

The thermal decomposition of ammonium dichromate produces chromium(III) oxide (Cr2O3) as the main product.

When aluminum reacts with hydrochloric acid, hydrogen gas (H2) is produced along with aluminum chloride (AlCl3).

In nitric acid, nitrogen has an oxidation state of +5.

When aluminum reacts with hydrochloric acid, hydrogen gas (H2) is produced along with aluminum chloride (AlCl3).

Boron is primarily used in the production of glass and ceramics.

Sulfuric acid is primarily used in the production of fertilizers.

Sulfuric acid is primarily used as battery acid in lead-acid batteries.

Carbon monoxide (CO) contains a coordinate bond between carbon and oxygen.

SiO2 (silicon dioxide) is a covalent compound formed by the sharing of electrons between silicon and oxygen.

Hydrogen peroxide (H2O2) is commonly used as a bleaching agent.

Boric acid is commonly used as a fire retardant due to its ability to inhibit combustion.

Lead does not form a stable +4 oxidation state; it is more stable in the +2 state.

Lead does not form a stable oxide in the same way as the other elements listed.

Group 13 elements typically form covalent compounds due to their tendency to share electrons.

Halogens exist as diatomic molecules (e.g., Cl2, F2) in their elemental form.

Noble gases are colorless and odorless under standard conditions.

P2O5 (phosphorus pentoxide) is the most acidic oxide among the given options.

Fluorine is the most electronegative element in the periodic table.

Lead commonly exhibits a +4 oxidation state, although +2 is also stable, +4 is more stable in many compounds.

The most stable oxidation state of nitrogen is +5, as seen in compounds like nitric acid.