Question

metal sulphides occur mainly in rocks but metal halides occur in sea and lake waters. give reasons

Answer 1

Because most of the metal sulphides are insoluble in water whereas metal halides are generally away with rain or river water in dissolved state and so the halides ores occur in lakes and seas.

Answer 2

Hey dear,

● Metal sulphides occur in rocks because -
- Metal sulphides are mostly insoluble in water and thus when present in rocks they aren't washed away.
- Thus, metal sulphides are present in rocks.

● Metal halides occur in seas / lakes -
- Metal halides are molstly soluble in water and thus gets washed away with rain.
- This dissolved salts are thus flown by river into seas/lakes.

Hope this helps you...