BMAT Knowledge 4

Question 1

A solution has a pH of 3. What is its hydrogen ion concentration [H⁺]?

Accepted Answer

10⁻³ mol/L

Answer

pH = −log[H⁺], so [H⁺] = 10^(−pH) = 10⁻³ mol/L.

Question 2

What type of electromagnetic radiation has the shortest wavelength?

Accepted Answer

Gamma rays

Answer

Gamma rays have the shortest wavelengths (below 10⁻¹¹ m) and highest frequencies in the electromagnetic spectrum.

Question 3

During meiosis, crossing over between non-sister chromatids occurs during which phase?

Accepted Answer

Prophase I

Answer

Crossing over occurs during Prophase I when homologous chromosomes pair up to form bivalents.

Question 4

A rectangular block has dimensions 2 cm × 3 cm × 5 cm and mass 90 g. What is its density?

Accepted Answer

3 g/cm³

Answer

Volume = 2×3×5 = 30 cm³; density = 90/30 = 3 g/cm³.

Question 5

Which type of chemical bond involves the sharing of electron pairs between atoms?

Accepted Answer

Covalent bond

Answer

Covalent bonds form when atoms share pairs of electrons, typically between two non-metals.

BMAT - Assessment Practice Test