2019
AIIMS
MCQ
AIIMS 2019
Assertion : A spherical water drops become flaton flatter surface.
Reason : It become flat due to gravity.
A.
If both assertion and reason are true and reason is the correct explanation of assertion.
B.
If both assertion and reason are true, but reason is not the correct explanation of assertion.
C.
If assertion is true, but reason is false.
D.
If both assertion and reason are false.
2018
AIIMS
MCQ
AIIMS 2018
When an excess and a very dilute aqueous solution of KI is added to very dilute aqueous solution of silver nitrate. The colloidal particles of silver iodide which are associated with the Helmholtz double layer in the form of
A.
$\mathrm{Agl} / \mathrm{Ag}^{+}: \mathrm{I}^{-}$
B.
$\mathrm{Agl} / \mathrm{K}^{+}: \mathrm{NO}_3^{-}$
C.
$\mathrm{Agl} / \mathrm{NO}_3^{-}: \mathrm{Ag}^{+}$
D.
$\mathrm{Agl} / \mathrm{I}^{-}: \mathrm{K}^{+}$
2018
AIIMS
MCQ
AIIMS 2018
Assertion (A) Micelles are formed by surfactant molecules above the critical micellar concentration (CMC).
Reason (R) The conductivity of a solution having surfactant molecules decreases sharply at the CMC.
A.
Both (A) and (R) are true and (R) is the correct explanation of (A).
B.
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
C.
(A) is true and (R) is false.
D.
Both (A) and (R) are false.