Question

 

Which of the following statement(s) is/are correct with reference to Fe2+and Fe3+ ions?

(i) Fe3+ gives brown colour with potassium ferricyanide 

(ii) Fe2+ gives blue colour with potassium ferricyanide 

(iii) Fe3+ gives red colour with potassium thiocyanate

(iv) Fe2+ gives brown colour with ammonium thicyanate

Solution

Correct option is

All of these

SIMILAR QUESTIONS

Q1

The geometry of Ni(CO)4 and [Ni(P Ph3)2] are

Q2

Of the following which is diamagnetic in nature?

Q3

The [Fe(CN)6]3– complex ion

Q4

50 ml of 0.2 M solution of a compound with empirical formula CoCl3.4NH3 on treatment with excess of AgNO3(aq) yields 1.435 g of AgCl. Ammonia is not removed by treatment with concentrated H2SO4. The formula of the compound is : 

Q5

When MnO2 is fused with KOH, a coloured compound is formed. The product and its colour are

Q6

 

In the process of extraction of gold, 

  

[x] and [y] are :

Q7

Which is diamagnetic and Which is paramagnetic amongest [Ni(CO)4], [Ni(CN)4]2– and [NiCl4]2–

Q8

Which of the following is non-conducting?

Q9

Aqueous solution of FeSO4 gives tests for both Fe2+ and  but after addition of excess of KCN, solution ceases to give test for Fe2+. This is due to of the formation

Q10

The disodium salt of ethylenediamine tetra acetic acid can be used to estimate the following ion(s) in the aqueous solution