Answer:
a) Schmidt number
Explanation:
Prandtl number in heat transfer is analogues to Schmidt number in mass transfer.
Prandtl number in heat transfer is the ration of momentum diffusivity to the heat diffusivity.

Whereas, Schmidt number in mass transfer is the ratio of momentum diffusivity to the mass diffusivity.

Visible light spectrum or electromagnetic spectrum
Answer:
The minimum energy required to eject an electron from sodium will be bigger.
Explanation:
red light has a higher wavelength, that mean that the energy that emitted is lower in comparison with the violet light.
If the rate of the photons is the same, 10,000 photons per second, that means that the required energy to take an electron need to be bigger to have the same effect.
Hope this info is useful.
Metathesis is a type of reaction in which the cations and anions exchange partners. this reaction is also called double replacement. Metathesis reactions are driven by the formation of a product .this reaction is classified into three different categories: formation of precipitate, f<span>ormation of a Weak or Non-electrolyte and production of the gas.</span>
Answer : The net ionic equation will be,

Explanation :
In the net ionic equations, we are not include the spectator ions in the equations.
Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.
The balanced ionic equation between zinc and hydrochloric acid will be,

The ionic equation in separated aqueous solution will be,

In this equation,
is the spectator ion.
By removing the spectator ion from the balanced ionic equation, we get the net ionic equation.
The net ionic equation will be,
