Balance the following chemical equation:

d) <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> ${Na}_{2}O$ + <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $H_{2}O$ → $NaOH$

Q. Balance the following chemical equation:
c) <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $H_2$ + <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $O_2$ → <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $H_2$O

Q. Balance the following chemical equation:
b) <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> ${Na}_2$${CO}_3$ + $HCl$ → $NaCl$ + <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $H_{2}O$ + <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> ${CO}_2$

Q. Balance the following chemical equation:
a) $FeS+HCl$ → <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> ${FeCl}_2$ + <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $H_{2}S$



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

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.

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;}-->