Day 214: JEE Mains Chemistry

1. A.
   (A)-(III), (B)-(I), (C)-(II), (D)-(IV)
2. B.
   (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
3. C.
   (A)-(IV), (B)-(II), (C)-(III), (D)-(I)
4. D.
   (A)-(II), (B)-(IV), (C)-(I), (D)-(III)

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1. A.
2. B.
3. C.
4. D.

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1. A.
   ${Ce}^{4 +}$ and ${Eu}^{2 +}$
2. B.
   ${Ce}^{4 +}$ and ${Tb}^{4 +}$
3. C.
   ${Ce}^{3 +}$ and ${Ce}^{4 +}$
4. D.
   ${Eu}^{2 +}$ and ${Ce}^{4 +}$

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1. A.
   $A$ is false but $R$ is true
2. B.
   Both A and R are correct and R is the correct explanation of $A$
3. C.
   Both A and R are correct but R is NOT the correct explanation of $A$
4. D.
   $A$ is true but $R$ is false

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