U1 T4 Timebound Practice

The anode in polarography is usually ______.

• Calomel electrode
• Dropping Mercury electrode
• Platinum electrode
• Pass

The current passing through mercury drop is usually ______.

• 1 - 10 miliamp
• +0.4 to -2 volts
• 1 - 10 microamp
• Pass

The difference in concentration of metal ion in bulk and that at mercury drop results into _____

• decomposition potential
• diffusion current
• migration current
• Pass

_________ is independent of concentration of reducible species.

• half wave potential
• overvoltage
• migration current
• Pass

True or false: Indifferent electrolyte is necessary in polarography

• true
• false
• Pass

True or false: Diffusion current is different for different metal ions.

• true
• false
• Pass