Which alloy is used to prepare surgical instruments?

Heating of carbonate ores in the absence of air to convert them into oxides is known as:

What are the components of bronze?

When a metal $X$ is treated with cold water, it gives a basic salt $Y$ with molecular formula $XOH$ (molecular mass $= 40$) and liberates a gas $Z$ which easily catches fire. Identify $X$, $Y$, and $Z$, and write the chemical reaction involved.

Which gas has a pungent smell that causes choking and coughing?

Which of the following is a reducing agent?