Hydrogen

What is the symbol and formula for hydrogen?

Symbol: H, Formula: H₂

Who first prepared hydrogen and in what year?

Robert Boyle in 1672.

What reaction occurs when dilute hydrochloric acid reacts with zinc?

Zn + 2HCl → ZnCl₂ + H₂(g) (Zinc chloride and hydrogen gas are produced).

What is the process called when an electric current is passed through water to decompose it?

Electrolysis.

What is a strong electrolyte?

Strong electrolytes are compounds that dissociate almost completely into ions in their aqueous or molten state.

What gas is produced when hydrogen burns in oxygen?

Steam (water vapor).

What type of flame does pure hydrogen produce when burned?

A pale blue flame.

Why is hydrogen considered a good reducing agent?

It removes oxygen from metal oxides, converting them into their corresponding metals.

Which is more soluble in water: hydrogen or oxygen?

Hydrogen is sparingly soluble in water.

What is the significance of hydrogen in the universe?

Hydrogen is the most abundant element and a major component of stars.

What happens when hydrogen reacts with chlorine gas?

H₂ + Cl₂ → 2HCl (Hydrogen chloride gas is formed).

In which process is hydrogen seen as the mass fuel of the future?

The hydrogen economy, which aims to replace fossil fuels.

What safety precaution should be taken during the preparation of