Ground tissue includes

Which one of the following salts gives an acidic solution in water?

Which of the following is not considered an organometallic compound?

In a binary compound,atoms of element $A$ form a $hcp$ structure and those of element $M$ occupy $2/3$ of the tetrahedral voids of the $hcp$ structure. The formula of the binary compound is

Which one of the following halogens liberates oxygen,when passed through hot concentrated $KOH$ solution?

If a line makes angles $\tan ^{-1} \sqrt{7}$ and $\tan ^{-1} \frac{\sqrt{5}}{\sqrt{3}}$ with the $X$-axis and $Y$-axis respectively,then the angle made by it with the $Z$-axis is