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:

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:

Collegedunia Admin · Accepted Answer

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

Answer

A and B only

Answer

B and C only

Answer

C and D only

Answer

D and A only

Ions	Ag⁺	K⁺	Na⁺	H⁺	\(\text{NO}_{3}^{-}\)	Cl^-	\(\text{SO}^{2-}_{4}\)	OH^-	CH₃COO^-
\(\Lambda_0\)	6.2	7.4	5.0	35.0	7.2	7.6	16.0	19.9	4.1

List I		List II
(P)	Titrate: KCl Titrant: AgNO₃	(1)
(Q)	Titrate: AgNO₃ Titrant: KCl	(2)
(R)	Titrate: NaOH Titrant: HCl	(3)
(S)	Titrate: NaOH Titrant: CH₃COOH	(4)
		(5)

List I Symbols		List II Terms
A	\(\Omega^{-1}\)	I	Specific conductance
B	\(∧\)	II	Electrical conductance
C	k	III	Specific resistance
D	\(\rho\)	IV	Equivalent conductance

The Correct Option is D

Solution and Explanation

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