Question

Name the following with one word.

1) A substance containing only one kind of atom. _________

2) A substance in good conductor of electricity. __________

3) A substance which can be easily broken. __________

4) The oxides of metals which dissolve in water to form bases. _________

5) When oxides of a non-metal are dissolved in water to form acids. __________

Answer 1

1) Substances that contain only one kind of atoms are ELEMENTS.

2) Substances which are good conductors of electricity are Conductors. For eg. graphite, most metals.

3) Substances which can be easily broken are Brittle. For eg.- Sulphur and Phosphorous.

4) The oxides of metals which dissolve in water to form bases are Basic in nature.
For eg.
Na₂O(basic oxide) + H₂O → 2NaOH(base)
K₂O + H₂O → 2KOH

5) Similarly oxides of non- metals are acidic in nature, so they dissolve in water to form acids.
For eg.-
CO₂(acidic oxide) + H₂O → H₂CO₃(acid)