The coagulating power of an ion for a given colloid depends on which of the following?

  • A
    Its size
  • B
    The magnitude of its charge
  • C
    The sign of its charge
  • D
    Both the magnitude and sign of its charge

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Identify the correct decreasing order of precipitation power of the flocculating ion added from the following.

Which of the following compounds has the highest coagulating power for a ferric hydroxide sol?

$X$ is a protecting colloid. The following data is obtained for preventing the coagulation of $10 \ mL$ of gold sol to which $1 \ mL$ of $10 \% NaCl$ is added. What is the gold number of '$X$'?
Expt. No.Weight of $X$ (in $mg$) added to gold solCoagulation
$1$$24$Not prevented
$2$$23$Not prevented
$3$$26$prevented
$4$$27$prevented
$5$$25$prevented

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$A$ colloidal solution is subjected to an electric field,and the colloidal particles move towards the anode. The amount of electrolytes $BaCl_{2}$,$AlCl_{3}$,and $NaCl$ required to coagulate the given colloid is in the order:

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