Index Properties MCQ with answer and solution

Concept

Particle shape characteristics of clay and sand

Formula

NONE

Step-by-step solution

1. Clay particles typically possess a flaky or plate-like particle shape due to their mineral structure. 2. Sand grains generally possess bulky, sub-rounded, or rounded particle shapes. 3. Since both statements i and ii are true statements, neither of them is false. Answer: D

Explanation

Clay particles typically possess a thin, flat, and flaky shape owing to their sheet-like crystalline mineral structure. In contrast, sand grains are bulky particles that generally feature rounded, sub-rounded, or angular shapes created by physical weathering. Because both statements provided in the question are true, option D is correct since neither statement is false.

Why the other options are wrong

A) Statement (i) is true because clay particles possess a flaky or plate-like shape. B) Statement (ii) is true because sand grains generally have a rounded or sub-rounded shape. C) Both statements (i) and (ii) are true, so neither statement is false.

Shortcut

Clay particles are flaky and sand grains are rounded; since both statements are true, neither is false.

Common mistake

Selecting option C by failing to notice the negative phrasing "false" and mistaking true statements for false ones.