Question

Stability index, determined for evaluating the stability of oil–water viscous emulsions, based on electric conductivity changes during non‐destructive short heating–cooling–heating cycles,
A. is defined as $\frac{Δ}{h}$, where h is the change in the conductivity between 35°C and 45°C and Δ is the conductivity interval within the two heating curves at 35°C
B. indicates the relative change in enthalpy between two cycles
C. is defined as $\frac{2Δ}{h}$, where h is the change in the conductivity between 35°C and 45°C and Δ is the conductivity interval within the two heating curves at 35°C
D. indicates the relative change in conductivity between two cycles
Choose the correct answer from the options given below:

• A. A and B only
• B. B and C only
• C. C and D only
• D. D and A only

Answer 1

Answer: (D)

D and A only

Answer 2

The correct option is (D): D and A only