Question

Dichromate ions posses their maximum absorbance at 450 nm which is orange in color. But upon dilution, maximum absorbance occurs at 410 nm. Why??​

Answer 1

$\huge\boxed{\underline{\mathcal{\red{❥A}\green{N}\pink{S}\orange{W}\blue{E}\purple{R}}}}$

Sea water is a mixture of salts and water which cannot be separated except by evaporation. Therefore, sea water is considered homogeneous.

Sea water also contains mud, decayed plant, etc., other than salts and water, so it is heterogeneous also.

Answer 2

ᴡʜᴇɴ ᴅɪʟ. sᴜʟᴘʜᴜʀɪᴄ ᴀᴄɪᴅ ɪs ᴀᴅᴅᴇᴅ ᴛᴏ sᴏᴅɪᴜᴍ ᴄᴀʀʙᴏɴᴀᴛᴇ ᴀɴᴅ ʜᴇᴀᴛᴇᴅ, ᴀ ᴄᴏʟᴏᴜʀʟᴇss, ᴏᴅᴏᴜʀʟᴇss ɢᴀs ɪs ᴇᴠᴏʟᴠᴇᴅ. ᴛʜɪs ɢᴀs ɪs ᴄᴏ2.

ᴡʜᴇɴ ᴄᴏ2 ɪs ᴘᴀssᴇᴅ ᴛʜʀᴏᴜɢʜ ʟɪᴍᴇ ᴡᴀᴛᴇʀ, ɪᴛ ᴛᴜʀɴs ʟɪᴋᴇ ᴡᴀᴛᴇʀ ᴍɪʟᴋʏ ᴅᴜᴇ ᴛᴏ ᴛʜᴇ ғᴏʀᴍᴀᴛɪᴏɴ ᴏғ ᴄᴀʟᴄɪᴜᴍ ᴄᴀʀʙᴏɴᴀᴛᴇ. ᴀʟsᴏ ᴛʜɪs ɢᴀs ᴅᴏᴇsɴ'ᴛ sʜᴏᴡ ᴀɴʏ ᴇғғᴇᴄᴛ ᴡʜᴇɴ ᴘᴀssᴇᴅ ᴛʜʀᴏᴜɢʜ ᴋ2ᴄʀ2