Which of the following is/are positively charged colloid
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a
Al(OH)3
b
SnO2
c
Haemoglobin
d
Gold
answer is A.
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Detailed Solution
Al(OH)3,SnO2 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.