<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Why are ionic compounds stable?

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> What are ionic compound? Give example.

Q.

Represent $\frac{19}{8}$ on the number line.

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->

Q.

Find the sum of multiplicative inverse of $\frac{5}{7}$ and additive inverse of $\frac{7}{5}$.

A. 1

B. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> 0

C. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> -$\frac{25}{49}$ <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->

D. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $\frac{25}{49}$ <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->

Q.

Which of the following rational numbers does not lie between $\frac{14}{20}$ and $\frac{37}{40}$.

A. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $\frac{3}{4}$ <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->

B. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $\frac{7}{8}$ <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->

C. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $\frac{9}{10}$ <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->

D. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $\frac{3}{5}$ <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->

Q.

Find 10 rational numbers between $\frac{-2}{5}$ and $\frac{1}{2}$ .

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->