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

JEE Main · 2024 · 31 Jan 2024 · Shift 2 · d and f Block Elements

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:

(A)A, B and D only
(B)A and C only✓ Correct
(C)A, B and C only
(D)B and C only

Answer: (B)

Solution

Mn2O7 is a green oil at room temperature (A true) and CrO is a basic oxide (C true). V2O4 dissolves in acid to give VO2+ (vanadyl), not VO2^2+, so statement B is false, and V2O5 is amphoteric so it does react with acid (D false). Only A and C are correct.

JEE Main · 2024 · 31 Jan 2024 · Shift 2 · Single correct option

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JEE Main · 2024 · 31 Jan 2024 · Shift 2 · d and f Block Elements

Solution

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