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Choose the correct statements from the following
A. ${Mn}_{2} O_{7}$ is an oil at room temperature
B. $V_{2} O_{4}$ reacts with acid to give ${VO}_{2}^{2 +}$
C. CrO is a basic oxide
D. $V_{2} O_{5}$ does not react with acid
Choose the correct answer from the options given below :

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A, B and D only

A and C only

A, B and C only

B and C only

answer is B.

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Detailed Solution

(A) ${Mn}_{2} O_{7}$ is green oil at room temperature.

(B) $V_{2} O_{4}$ dissolve in acids to give ${VO}^{2 +}$ salts.

(D) $V_{2} O_{5}$ is amphoteric it reacts with acid as well as base.

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