Explanation

Hydrochloric acid (HCl) reacts with Sodium hydroxide (NaOH) to form Sodium chloride (NaCl) and Water (H₂O) — a typical acid-base neutralization reaction.

The balanced equation is:

NaOH + HCl → NaCl + H₂O

Explanation

• A Neutralization reaction is a specific type of reaction where an acid and a base react to form a salt and water only, with no other products.
• This reaction is characterized by the elimination of acidic and basic properties, resulting in a neutral solution.
• Example: HCl (acid) + NaOH (base) → NaCl (salt) + H2O (water)

Explanation

When calcium carbonate (CaCO₃) reacts with dilute hydrochloric acid (HCl), it produces carbon dioxide (CO₂) gas.

The reaction is:

CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O

Explanation

Explanation

Electromagnetic spectrum order (longest to shortest wavelength):

Radio waves (includes TV signals) → Infrared → Visible light → X-rays.

It follows this order, starting with television (radio waves) and ending with X-rays.

Explanation

All electromagnetic waves (like light, X-rays, and radio waves) travel through a vacuum at the same constant speed.

It is approximately 3 × 10⁸ meters per second.

Explanation

• The heat from the Sun reaches Earth in the form of electromagnetic waves, which is called radiation.
• This includes ultraviolet (UV) rays, visible light, and infrared (IR) rays.
• Radiation is the transfer of energy through electromagnetic waves, without the need for a medium like air or water.

Explanation

The to and fro movement of a pendulum is called a vibration or oscillation.

It's a repeated back-and-forth motion about a central position.

Explanation

Explanation

When a sound wave strikes a surface and bounces back into the original medium, this is called reflection.

It’s the same principle behind echoes.