Explanation

The catalyst in Friedel-Crafts alkylation is AlCl3 (aluminum chloride).

Explanation

In forming H2CO3 (carbonic acid), each oxygen atom utilizes sp2 hybrid orbitals.

Explanation

Pure water could be obtained from seawater by distillation.

Explanation

• The compound K2Cr2O7 (potassium dichromate) is not a transition metal complex.
• It contains chromium in the +6 oxidation state, but it does not form a coordination complex with ligands.
• Instead, it is a chromium compound in which chromium is in the form of a polyatomic ion

Explanation

The oxidation of glucose to gluconic acid is a reaction that involves the loss of two electrons:

C6H12O6 (glucose) → C6H12O7 (gluconic acid)

Explanation

Elements having zero nuclear spin cannot be directly determined by NMR (Nuclear Magnetic Resonance) spectroscopy because NMR relies on the detection of signals from nuclei with non-zero nuclear spin.

Explanation

The complexometric titration using EDTA (Ethylenediaminetetraacetic acid) as a titrant is not suitable for titrating Xe (xenon) since xenon does not form stable complexes with EDTA.

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.