1
JEE Advanced 2023 Paper 2 Online
MCQ (More than One Correct Answer)
+4
-2
Change Language
Atoms of metals $\mathrm{x}, \mathrm{y}$, and $\mathrm{z}$ form face-centred cubic (fcc) unit cell of edge length $\mathrm{L}_{\mathrm{x}}$, body-centred cubic (bcc) unit cell of edge length $\mathrm{L}_y$, and simple cubic unit cell of edge length $\mathrm{L}_z$, respectively.

If $\mathrm{r}_{\mathrm{z}}=\frac{\sqrt{3}}{2} r_{\mathrm{y}} ; \mathrm{r}_{\mathrm{y}}=\frac{8}{\sqrt{3}} \mathrm{r}_{\mathrm{x}} ; M_{\mathrm{z}}=\frac{3}{2} M_{\mathrm{y}}$ and $M_{\mathrm{z}}=3 M_{\mathrm{x}}$, then the correct statement(s) is(are) :

[Given: $M_x, M_y$, and $M_z$ are molar masses of metals $x, y$, and $z$, respectively.
$\mathrm{r}_{\mathrm{x}}, \mathrm{r}_{\mathrm{y}}$, and $\mathrm{r}_{\mathrm{z}}$ are atomic radii of metals $\mathrm{x}, \mathrm{y}$, and $\mathrm{z}$, respectively.]
A
Packing efficiency of unit cell of $x>$ Packing efficiency of unit cell of $y>$ Packing efficiency of unit cell of $z$
B
$\mathrm{L}_{\mathrm{y}}>\mathrm{L}_{\mathrm{z}}$
C
$\mathrm{L}_{\mathrm{x}}>\mathrm{L}_{\mathrm{y}}$
D
Density of $x>$ Density of $y$
2
JEE Advanced 2022 Paper 1 Online
MCQ (More than One Correct Answer)
+4
-2
Change Language
The correct option(s) related to adsorption processes is(are)
A
Chemisorption results in a unimolecular layer.
B
The enthalpy change during physisorption is in the range of 100 to $140 \mathrm{~kJ} \mathrm{~mol}^{-1}$.
C
Chemisorption is an endothermic process.
D
Lowering the temperature favors physisorption processes.
3
JEE Advanced 2021 Paper 1 Online
MCQ (More than One Correct Answer)
+4
-2
Change Language
The correct statement(s) related to colloids is (are)
A
The process of precipitating colloidal sol by an electrolyte is called peptization.
B
Colloidal solution freezes at higher temperature than the true solution at the same concentration.
C
Surfactants form micelle above critical micelle concentration (CMC). CMC depends on temperature.
D
Micelles are macromolecular colloids.
4
JEE Advanced 2020 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2
Change Language
The cubic unit cell structure of a compound containing cation M and anion X is shown below. When compared to the anion, the cation has smaller ionic radius. Choose the correct statement(s).

JEE Advanced 2020 Paper 1 Offline Chemistry - Solid State & Surface Chemistry Question 17 English
A
The empirical formula of the compound is MX.
B
The cation M and anion X have different coordination geometries.
C
The ratio of M$$-$$X bond length of the cubic unit cell edge length is 0.866.
D
The ratio of the ionic radii of cation M to anion X is 0.414.
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