Do I need separate demat accounts for equities and bonds?

Do I need a separate demat account for holding my gold bonds?

Do I need a demat account to invest in mutual funds?

Do I need to give power of attorney for my demat account?

Do I need a demat account if I only intend to do day trading?

Do I understand correct that there is no merit in having multiple demat accounts and just one demat account is good enough?

Do I have really run any risk if I hold multiple demat accounts?

Why do I need to review the demat charges beforehand?

Since demat is electronic, do I need to maintain physical record at all?

As a demat account holder with a leading bank in India, are there are any safety measures that I need to adopt to be on the safer side?

Can you explain what is meant by risk-adjusted asset allocation and what is the need for an investor do a risk-adjusted asset allocation using MFs, bonds, deposits?