Question

In the conductivity apparatus, which compound can cause the light to glow, when added to water?
A.Table salt
B.Sugar
C.Glycerine
D.Ethyl Alcohol

Answer 1

Hint: We need to study conductivity and the conductivity apparatus. The relative conductivity of various solutions may be measured using a solution conductivity device, which is explained. The device may be used as a hand-held presentation model with a 10-element LED display or as a lecture-hall demonstration model with a 10-incandescent-lamp array.

Complete answer:
The capacity of an aqueous solution to transmit an electric current is measured by conductivity. Another outdoor parameter we utilize as a groundwater well stability indication is conductivity. The concentration of the ionized species in a solution, mobility of the ionized species in a solution, and valence state of the ionized species in a solution, as well as the temperature at which the measurement is made, all have a role. The conductivity of water increases with the concentration of ions in it. We indirectly assess the amounts of dissolved salts, bases, and acids when we test the conductivity of a water sample. Organic compounds that do not dissociate in water have weak conductivity, whereas inorganic compound solutions have excellent conductivity.
When table salt is added to water in the conductivity device, it causes the light to glow. Because water is largely unionized, it has extremely low conductivity. The conductivity rises when table salt is added because it is totally ionized. The light will glow as a result of this.

Hence, the correct option is option A.

Note:
Note that because higher temperatures make water less viscous, the speed at which various sizes and charge ions flow in water changes. Measurements of conductance, which is defined as the reciprocal of resistance, are used to express conductivity as a quality.