Which of the following is green in colour?
A) Mn2O7
B) PbCrO4
C) Ag2CrO4
D) K2Cr2O7
Answer (2)
Among the options given, none of the compounds is characterized as green in color. Mn2O7 is brown, PbCrO4 is yellow, Ag2CrO4 is dark red, and K2Cr2O7 is orange. Therefore, the selected answer is that none of these options is green.
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To determine which compound is green in color, let's look at the options provided:
(A) Mn₂O₇ - Manganese heptoxide is typically a dark green oil that can appear as a green liquid.
(B) PbCrO₄ - Lead chromate is yellow in color and is often used as a pigment known as chrome yellow.
(C) Ag₂CrO₄ - Silver chromate is typically a dark red-brown compound.
(D) K₂Cr₂O₇ - Potassium dichromate is known for its bright orange-red color.
Analyzing these options, the compound that is green in color is Mn₂O₇ (Option A). It appears as a dark green, oily liquid, making it the correct choice.
So, the answer is option (A) Mn₂O₇.
