JEE & NEET Science Facts

Newton's second law: force equals mass times ____.

• acceleration
• velocity
• weight
• momentum

Acceleration due to gravity near Earth's surface is about:

• 9.8 m/s²
• 3.8 m/s²
• 98 m/s²
• 6.0 m/s²

The speed of light in a vacuum is about:

• 9.8 × 10⁸ m/s
• 6 × 10²³ m/s
• 3 × 10⁶ m/s
• 3 × 10⁸ m/s

Ohm's law: voltage equals current times ____.

• resistance
• charge
• power
• capacitance

The universal law of gravitation was formulated by Albert Einstein.

• True
• False

Kinetic energy equals one-half times mass times:

• velocity
• acceleration
• mass
• velocity squared

Atomic number equals the number of ____ in the nucleus.

• neutrons
• protons
• molecules
• electrons

What is the atomic number of oxygen?

• 6
• 8
• 16
• 1

Avogadro's number is approximately:

• 6.022 × 10²³
• 3 × 10⁸
• 9.8 × 10²³
• 6.022 × 10⁸

On the pH scale, values below 7 indicate:

• salts
• bases
• neutral
• acids

Pure water at 25 °C has a neutral pH of 7.

• True
• False

Table salt, NaCl, is formed by an ____ bond.

• metallic
• covalent
• ionic
• hydrogen

The chemical formula for water is:

• H₂O
• O₂
• NaCl
• CO₂

Mitochondria produce ____, the energy currency of cells.

• glucose
• ATP
• DNA
• hemoglobin

Photosynthesis occurs in which plant structure?

• ribosomes
• chloroplasts
• nucleus
• mitochondria