Identify the plant shown in the given figure.

$ \int \frac{\sin 2x}{\sin^2 x + 2\cos^2 x} dx = $

Which of the following compounds will react with $NaHCO_3$ solution to give sodium salt and carbon dioxide?

$A$ public park,in the form of a square,has an area of $(100 \pm 0.2) \; m^2$. The side of the park is ............ $m$.

Which one of the following is used as an acid flux in metallurgy?

$75 \ mL$ of $0.2 \ M \ HCl$ is mixed with $25 \ mL$ of $1 \ M \ HCl$. To this solution,$300 \ mL$ of distilled water is added. What is the $pH$ of the resultant solution?