**JEE Main Previous Year Papers Questions of Chemistry with Solutions are available at eSaral. Practicing JEE Main chapter wise questions of Chemistry will help the JEE aspirants in realizing the question pattern as well as help in analyzing weak & strong areas.**

**Simulator**

**Previous Years AIEEE/JEE Mains Questions**

(1) 144 pm (2) 288 pm (3) 398 pm (4) 618 pm

** Aieee-10**

**Sol.**(1)

radius of cation = 110 pm

if cation present 2n OV

$a=2\left(r_{+}+r_{-}\right)$

508 = 2[110 + x]

x = 144 pm

(1) 48% and 26% (2) 30% and 26% (3) 26% and 32% (4) 32% and 48%

**Aieee-10**

**Sol.**(3)

Theory Based

(1) 181 pm (2) 108 pm (3) 128 pm (4) 157 pm

**Aieee-11 / JEE-Main-ONLINE 2013**

**Sol.**(3)

(1) $\mathrm{A}_{2} \mathrm{B}_{3}$

( 2) $\mathrm{A}_{2} \mathrm{B}_{5}$

(3) $\mathrm{A}_{2} \mathrm{B}$

(4) $\mathrm{AB}_{2}$

**Aieee-11 / JEE-Main-ONLINE 2014**

**Sol.**(2)

(1) 152 pm (2) 75 pm (3) 300 pm (4) 240 pm

** Aieee-12**

**Sol.**(1)

(1) Octahedral (2) Tetrahedral (3) Pyramidal (4) Trigonal

**Jee-Main (online)-12**

**Sol.**(1)

(1) 158 pm (2) 174 pm (3) 142 pm (4) 126 pm

** Jee-Main (online)-12**

**Sol.**(1)

(1) 314.20 pm (2) 216 pm (3) 200 pm (4) 1.41 pm

**Jee-Main (online)-12**

**Sol.**(3)

(1) Density of crystals remains unaffecfted due to Frenkel defect

(2) In BCC unit cell the void space is 32%

(3) Electrical conductivity of semiconductors and metals increases with increase in temperature

(4) Density of crystals decreases due to Schottky defect

** Jee-Main (online)-12**

**Sol.**(3)

Theory Based

(1) $\mathrm{AB}_{2}$

( 2) $\mathrm{AB}_{3}$

(3) $\mathrm{AB}_{4}$

(4) $\mathrm{A}_{2} \mathrm{B}_{5}$

**Jee-Main (online)-13**

**Sol.**(3)

**incorrect**?

(1) Void space in ccp mode of packing is 26%

(2) Coordination number in hcp mode of packing is 12

(3) Void space in hcp mode of packing is 32%

(4) Coordination number in bcc mode of packing is 8

**Jee-Main (online)-13**

**Sol.**(3)

Theory based

(1) 0.96 nm (2) 0.4 nm (3) 0.24 nm (4) 0.56 nm

**Jee-Main (online)-13**

**Sol.**(2)

(1) 7.01% (2) 4.08% (3) 6.05% (4) 5.08

** Jee-Main (offline)-13**

**Sol.**(2)

(1) 1 (2) 2 (3) 3 (4) 4

**Jee-Main (online)-14**

**Sol.**(1)

Theory based

(1) $\mathrm{a} \neq \mathrm{b} \neq \mathrm{c}$ and $\alpha \neq \beta \neq \gamma \neq 90^{\circ}$

(2) $a \neq b \neq c$ and $\beta=\gamma=90^{\circ} \neq \alpha$

(3) $a=b \neq c$ and $\alpha=\beta=\gamma=90^{\circ}$

(4) $a \neq b \neq c$ and $\alpha=\beta=\gamma=90^{\circ}$

**Jee-Main (online)-14**

**Sol.**(2)

Theory based

(1) Frenkel defect (2) F-centres (3) Schottky defect (4) Interstitial position

**Jee-Main (online)-14**

**Sol.**(2)

Theory based

(1) $\mathrm{r}_{\mathrm{Cs}^{+}}+\mathrm{r}_{\mathrm{Cl}^{-}}=\frac{\sqrt{3}}{2} \mathrm{a}$

(2) $\mathrm{r}_{\mathrm{Cs}^{+}}+\mathrm{r}_{\mathrm{Cl}^{-}}=\sqrt{3} \mathrm{a}$

(3) $\quad \mathrm{r}_{\mathrm{Cs}^{+}}+\mathrm{r}_{\mathrm{Cl}^{-}}=3 \mathrm{a}$

(4) $\mathrm{r}_{\mathrm{Cs}^{+}}+\mathrm{r}_{\mathrm{Cl}^{-}}=\frac{3 \mathrm{a}}{2}$

**Jee-Main (offline)-14**

**Sol.**(1)

(1) 2a

(2) $2 \sqrt{2} \mathrm{a}$

(3) $\sqrt{2} \mathrm{a}$

(4) $\frac{\mathrm{a}}{\sqrt{2}}$

**JEE – Main 2017**

**Sol.**(4)

(1) Vacancy defect

(2) Frenkel defect

(3) Metal deficiency defect

(4) Schottky defect

**JEE – Main 2018**

**Sol.**(2)

In Frenkel defect, some of ion (usually cation due to their small size) missing from their correct position and occupies position in interstitial.