Analytical Chemistry Question 226

Question: A salt which gives $ CO_2 $ with hot conc. $ H_2SO_4 $ and also decolourizes acidified $ KMnO_4 $ . On warming is:

Options:

A) $ HCO_3^{-} $

B) $ CO_3^{2-} $

C) Qxalate

D) Acetate

Show Answer

Answer:

Correct Answer: C

Solution:

[c] $ Na_2C_2O_4+H_2SO_4\to $

$ Na_2SO_4+H_2O+CO+CO_2 $ CO burns with blue flame $ 2CO+O_2\to 2CO_2 $

$ Na_2C_2O_4+H_2SO_4( dil )\to $

$ Na_2SO_4+H_2C_2O_4 $

$ 2KMnO_4+3H_2SO_4+5H_2C_2O_4\to $

$ K_2SO_4+2MnSO_4+8H_2O+10CO_2 $



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