Explanation

In voltammetry, diffusion current is measured as a function of scanning potential difference.

Explanation

The combination that will produce a precipitate is NaOH (aq) and Fe(NO3)3 (aq).

Explanation

The metal that is most active is the one that can displace other metals from their salts. Based on the equations provided:

• Ni can displace Pb from Pb(NO3)2, so Ni is more active than Pb.
• Ni cannot displace Ag from AgNO3 (no reaction), so Ag is less active than Ni.
• Cu cannot displace Ag from AgNO3 (no reaction), so Ag is less active than Cu.

Therefore, the order of reactivity is: Ni > Pb > Cu > Ag

So, Ni is the most active metal among the options.

Explanation

• The statement that is not true about the precision of data is: "It is the difference between the obtained value and the true value."

Explanation

The value of the molar extinction coefficient of compound Z is 150 mol-1 dm3 cm-1.

Explanation

Polymers that soften on heating and harden when cooled are called thermoplastics.

Explanation

The concentration of A after 29 seconds is approximately 0.15 M.

Explanation

In crystal field theory (CFT), the energy gap between the t2g and eg sets is denoted by 10Dq.

Explanation

When a chemical cell's voltage drops to zero, it typically indicates that the cell reaction has reached equilibrium.

Explanation

Natural rubber consists of polymers of the organic compound isoprene.