Select the proper option (A), (B), (C) or (D) from the given options so that the statement becomes true: Chapter 1 (1) $\left(-3 \frac{4}{5}\right)$ is a/an $\dots\dots\dots\dots$ number. (A) whole (B) natural (C) integer (D) rational (2) $\left(-1 \frac{1}{2}\right)$ is expressed as $\dots\dots\dots\dots$ in $\frac{p}{q}$ form. (A) $\left(-\frac{3}{2}\right)$ (B) $\left(-\frac{2}{3}\right)$ (C) $\frac{3}{2}$ (D) $\frac{2}{3}$ (3) $\frac{2}{3} + \frac{3}{4} = \frac{3}{4} + \frac{2}{3}$ represents $\dots\dots\dots\dots$ property of addition of rational number. (A) associative (B) commutative (C) distributive (D) closure (4) $20 \times \left(-\frac{1}{20}\right) = \dots\dots\dots\dots$ (A) $1$ (B) $(-1)$ (C) $0$ (D) $20$ (5) $\frac{3}{4} \times 1 = \dots\dots\dots\dots$ (A) $\frac{3}{4}$ (B) $\left(-\frac{3}{4}\right)$ (C) $\left(-\frac{1}{4}\right)$ (D) $\frac{1}{4}$ (6) $\left(-\frac{3}{4}\right) + \left(\frac{3}{4}\right) = \dots\dots\dots\dots$ (A) $\left(-\frac{3}{2}\right)$ (B) $1$ (C) $(-1)$ (D) $0$ (7) For all the rational numbers $a$, $b$ and $c$, $a(\dots\dots\dots\dots) = ab - ac$. (A) $a - c$ (B) $b - c$ (C) $c - a$ (D) $c - b$

उत्तर: (1) (D) rational, (2) (A) -3/2, (3) (B) commutative, (4) (B) -1, (5) (A) 3/4, (6) (D) 0, (7) (B) b - c

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