Question

The product of oxidation of $${I^ - }\,{\text{with}}\,MnO_4^ - $$   in alkaline medium is

A. $$IO_3^ - $$  
B. $${I_2}$$
C. $$I{O^ - }$$
D. $$IO_4^ - $$
Answer :   $$IO_3^ - $$
Solution :
$$6MnO_4^ - + {I^ - } + 6O{H^ - } \to 6MnO_4^{2 - } + IO_3^ - + 3{H_2}O$$

Releted MCQ Question on
Inorganic Chemistry >> D and F Block Elements

Releted Question 1

When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volume of hydrogen evolved is

A. $$1:1$$
B. $$1:2$$
C. $$2:1$$
D. $$9:4$$
Releted Question 2

Which of the following is the weakest base

A. $$NaOH$$
B. $$Ca{\left( {OH} \right)_2}$$
C. $$KOH$$
D. $$Zn{\left( {OH} \right)_2}$$
Releted Question 3

One of the constituent of German silver is

A. $$Ag$$
B. $$Cu$$
C. $$Mg$$
D. $$Al$$
Releted Question 4

Which of the following dissolve in hot conc.$$NaOH$$  solution

A. $$Fe$$
B. $$Zn$$
C. $$Cu$$
D. $$Ag$$

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D and F Block Elements


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