Which acid is formed when sulfur dioxide reacts with water?

What is the melting point of alumina $(Al_2O_3)$ (in $;K$)?

Give reasons for the following:
$(i)$ Gold and platinum are used in jewellery.
$(ii)$ Copper cannot displace hydrogen from dilute acids.
$(iii)$ Stainless steel does not rust easily.
$(iv)$ Metals can be given different shapes according to our needs.
$(v)$ Zinc does not give hydrogen gas on reacting with $HNO_3$.

What is the color of copper carbonate salt?

Solder is an alloy of lead and tin. It has a:

Which of the following is an alloy?