Day 507: JEE Mains Chemistry

1. A.
   ${Al}_{2}O_{3}$
2. B.
   ${Ga}_{2}O_{3}$
3. C.
   ${Tl}_{2}O_{3}$
4. D.
   $B_{2}O_{3}$

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

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

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

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

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