Question

Match List-I with List-II

List-I (Compound)	List-II (Colour)
(A) \(Fe_4[Fe(CN)_6]_3.xH_2O\)	(I) Violet
(B) \( [Fe(CN)_5NOS]^{4–} \)	(II) Blood Red
(C) \( [Fe(SCN)]^{2+}\)	(III) Prussian Blue
(D) \((NH_4)_3PO_4.12MoO_3\)	(IV) Yellow

Choose the correct answer from the options given below:

• A. A-III, B-I, C-II, D-IV
• B. A-IV, B-I, C-II, D-III
• C. A-II, B-III, C-IV, D-I
• D. A-I, B-II, C-III, D-IV

Answer 1

The Correct Option is A

To solve this chemistry question, we need to match each compound from List-I with its corresponding color from List-II. Let's analyze each compound:

1. \((A) Fe_4[Fe(CN)_6]_3.xH_2O\) is known as Prussian Blue. It is commonly recognized for its intense blue color. Therefore, the correct match is III. Prussian Blue.
2. \((B) [Fe(CN)_5NOS]^{4–}\) is referred to as sodium nitroprusside. This compound typically appears violet. Hence, it corresponds to I. Violet.
3. \((C) [Fe(SCN)]^{2+}\) forms a complex that is characterized by its blood red coloration known in iron thiocyanate tests. Thus, it aligns with II. Blood Red.
4. \((D) (NH_4)_3PO_4.12MoO_3\), often referred to as ammonium phosphomolybdate, is well-known for its yellow color. Therefore, it is IV. Yellow.

Based on the above analysis, the correct matching of compounds to their colors is A-III, B-I, C-II, D-IV. This matches with the provided correct answer.

Answer 2

To solve this matching problem, we need to correctly associate each compound in List-I with its corresponding color in List-II. Let us consider each compound one by one:

1. Compound (A): \(Fe_4[Fe(CN)_6]_3.xH_2O\) is known as Prussian Blue. It is a dark blue pigment that was historically important in painting and is used in various applications. Thus, the correct match for Compound (A) is Prussian Blue (III).
2. Compound (B): \([Fe(CN)_5NOS]^{4–}\) is known as Sodium Nitroprusside. In its crystalline form, it often appears as a violet solid. Thus, the correct match for Compound (B) is Violet (I).
3. Compound (C): \([Fe(SCN)]^{2+}\) forms a complex with thiocyanate ions that exhibits a Blood Red color. This compound is often used in qualitative analysis as an indicator for iron(III) ions. Thus, the correct match for Compound (C) is Blood Red (II).
4. Compound (D): \((NH_4)_3PO_4.12MoO_3\) is known as Ammonium Phosphomolybdate. It typically appears as a Yellow precipitate and is used in the qualitative analysis of phosphoric acid and phosphate salts. Thus, the correct match for Compound (D) is Yellow (IV).

Based on this analysis, the correct matching of each compound with its respective color is:

• A: Prussian Blue (III)
• B: Violet (I)
• C: Blood Red (II)
• D: Yellow (IV)

The correct answer is: A-III, B-I, C-II, D-IV.