Chemistry Questions

How many elements are present in the group of the 18th Modem Periodic Table?

Of the following commonly used materials, the one that is not an alloy is

Atoms of same element having different mass numbers are called__________

Lime water turns milky when carbon dioxide is passed through it. It is due to the formation of

In a compound the elements are always present in definite proportions by ______

Activated Charcoal is used to remove colouring matter from pure substances by_______

The conversion of hard water into soft water by boiling or adding calcium hydroxide is called _______.

Which chemical is present in the cells of cork of tree which makes them impervious to gases and water