Which of the following phosphate species does not exist in water?

Question

What will be the energy of 1 mole of photons having a wavelength of 200 nm?
Planck’s constant, \( h = 6.6 \times 10^{-34} \, \mathrm{Js} \) and Speed of light, \( c = 3.0 \times 10^8 \, \mathrm{ms^{-1}} \)

Answer 1

Phosphate species present in water are pH-dependent:

H₂PO₄⁻: Present in acidic conditions.
HPO₄²⁻: Present in neutral to slightly alkaline conditions.
PO₄³⁻: Present in highly alkaline conditions.

The species HPO₃⁴⁻ is nonexistent, as it would necessitate an impossible phosphorus oxidation state.

LIST I (Experiment)	LIST II (Conclusion)
A. Photoelectric effect	I. Ether medium does not exist
B. Michelson-Morley	II. Light is made up of photons
C. Stern-Gerlach	III. Quantization of electronic orbit
D. Franck-Hertz	IV. Electron spin moment

Firm 2	Cooperate	Compete
Firm 1	5, 5	0, 10
Compete	10,0	2, 2

Which of the following phosphate species does not exist in water?

Show Hint

The Correct Option is D

Solution and Explanation

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