Teaching UP B.Ed (Paper 1 & 2) Mock Test 2025 General Science Chemistry Periodic Table

Which of the following is colourless?

1

[Cr₂O₇]^2-

2

\(\rm MnO_4^-\)

3

[Ni(H₂O)₆]²⁺

4

[Cu(PPh₃)₄]⁺

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