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
All of these
The geometry of Ni(CO)4 and [Ni(P Ph3)2] are
Of the following which is diamagnetic in nature?
The [Fe(CN)6]3– complex ion
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 :
When MnO2 is fused with KOH, a coloured compound is formed. The product and its colour are
In the process of extraction of gold,
[x] and [y] are :
Which is diamagnetic and Which is paramagnetic amongest [Ni(CO)4], [Ni(CN)4]2– and [NiCl4]2–
Which of the following is non-conducting?
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
The disodium salt of ethylenediamine tetra acetic acid can be used to estimate the following ion(s) in the aqueous solution