Assertion :Thixotropy and syneresis are two distinct properties of gels. Reason: In both the two properties, thixotropy and syneresis of gels, internal liquid comes out.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Assertion is correct but Reason is incorrect.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Assertion is incorrect but Reason is correct.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
Colloidal system in which liquids are the dispersed phase and solid act as the dispersion medium are called gels.

The common examples are boot pollishes, jelly, gum arabic, agar agar, processed cheese. When the gels are allowed to stand for a long time, they give out small quantities of trapped liquids with accumulate on its surface.

This action of gels is known as synresis of weeping. Some gels such as silica, gelatin and ferric hydroxide liquify on shaking and reset on allowing to stand. This phenomenon of sol-gel transformation is called thixotropy.
(Thixotropy - outcome of internal liquid on shear disturbing gel structure.
Syneresis - spontaneous outcome of internal liquid without disturbing gel structure.)

Hence,option B is correct.

Suggest Corrections

Similar questions

Assertion: Be and Al have similar properties.

Reason: $B e^{2 +}$ and $A l^{3 +}$ have nearly the same charge/volume ratios and similar polarising power.

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

Q. Assertion: Magnesium is important in carbohydrate and protein metabolism. Reason: Mg²⁺ is involved in the synthesis of Nucleic acids.

Q. Assertion : Two electrons of helium atom are placed in only one shell but three electrons of lithium need two shells.
Reason: A shell can have maximum

{2n}^{2}

electrons.

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Join BYJU'S Learning Program