Acidic, basic or amphoteric nature of vanadium and chromium oxides

1. A.
   $X =$ basic $Y =$ amphoteric
2. B.
   $X =$ amphoteric $Y =$ basic
3. C.
   $X =$ acidic $Y =$ acidic
4. D.
   $X =$ basic $Y =$ basic

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1. A.
   $V_{2}O_{5} > V_{2}O_{4} > V_{2}O_{3}$
2. B.
   $V_{2}O_{4} > V_{2}O_{3} > V_{2}O_{5}$
3. C.
   $V_{2}O_{3} > V_{2}O_{5} > V_{2}O_{4}$
4. D.
   $V_{2}O_{3} > V_{2}O_{4} > V_{2}O_{5}$

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1. A.
   A, B and D only
2. B.
   A and C only
3. C.
   A, B and C only
4. D.
   B and C only

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1. A.
   +3
2. B.
   +7
3. C.
   +5
4. D.
   +4

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1. A.
   Acidic
2. B.
   Neutral
3. C.
   Basic
4. D.
   Amphoteric

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1. A.
   neutral
2. B.
   acidic
3. C.
   basic
4. D.
   amphoteric

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1. A.
   5
2. B.
   4
3. C.
   2
4. D.
   3

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