Bronze is an alloy of:

Which of the following ores is in the form of sulphide?

Write the balanced chemical equation for each of the following cases:
$(a)$ Magnesium is treated with very dilute $HNO_3$.
$(b)$ Aluminium powder is added to $Fe_2O_3$.
$(c)$ Zinc sulphide is roasted.

Which of the following pairs will give displacement reactions?

$Al_{2}O_{3(s)} + 2NaOH_{(aq)} \xrightarrow{\Delta} \dots + H_{2}O_{(l)}$

Which non-metal element is used in the vulcanization of rubber?