What is the color of a potassium dichromate solution?

Reaction between $X$ and $Y$ forms compound $Z$. $X$ loses an electron and $Y$ gains an electron. Which of the following properties is not shown by $Z$?

The electronic configurations of three elements $X$, $Y$, and $Z$ are $X: {2, 8}$, $Y: {2, 8, 7}$, and $Z: {2, 8, 2}$. Which of the following is correct?

Name one metal and one non-metal that are found in a liquid state at room temperature.

About $.......\, \%$ impurity remains in alumina obtained by Bayer's method. (in $\%$)

Although metals form basic oxides,which of the following metals form an amphoteric oxide?