In stainless steel _________is used to prevent corrosion.

It is dangerous to increase _________in our body.

Pick the odd one out.

I Ton seawater contains____________Kg salt.

Which metal helps in the production of hemoglobin?

__________is used for making aeroplane.

Pick the odd one out.

Name the metal required for the growth of bones and teeth?

Pick the odd one out.

Crystal type inorganic substances present in earth crust is