1.

Which of the following is/are +vely charged colloid

Answer»

`Al(OH)_(3)`
`SnO_(2)`
Haemoglobin
GOLD

Solution :(abc) `Al(OH)_(3),SnO_(2)` and haemoglobin are +vely charged due to adsorption of +ve CHARGE.
(d) Gold is -vely charged colloid due to capture of electrons in Bredig's Arc method.


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