Login
Subject: Chemistry, asked on 18/10/17

Why fluorides of transition metals are unstable in low oxidation states, Example:- VF2

Subject: Chemistry, asked on 18/10/17

Q.meaning of the red underlined part.....how does this effects oxidation states?
or too many d electrons [ hence fewer orbitals available in which to share electrons with others]

Subject: Chemistry, asked on 18/10/17

why the second ionisation enthalpy of zinc is more than that of chromium although cr(+) has more stable configuration than zn(+)

Subject: Chemistry, asked on 9/10/17

Solve this:

Subject: Chemistry, asked on 9/10/17

28 (ii) with reason
Q.28. Describe the general trends in the following properties of the first series (3d) of the transition elements:
(i) Number of oxidation states exhibited.
(ii) Formation of oxo metal ions.

Subject: Chemistry, asked on 4/10/17

why Cr, Mo and W have high melting point as compared to other elements?

Subject: Chemistry, asked on 1/10/17

15. An aqueous solution of a compound (A) is acidic towards litmus and (A)
sublimes at about 3000C. (A) on treatment with an excess of NH4SCN gives a red
coloured compound (B) and on treatment with a solution of K4(Fe (CN)6) gives a blue
coloured compound (C). (A) on heating with the excess of K2Cr2O7 in the presence of
concentrated H2SO4 evolves deep red vapour of (D). On passing the vapours of (D)
into a solution of NaOH and d then adding the solution of acetic acid and lead
acetate a yellow precipitate of compound (E) is obtained. Identify A to E and give
chemical equations involved.

Subject: Chemistry, asked on 29/9/17

Although Zr belongs to 4d and Hf belongs to 5d transition series but it is quite difficult to separate them, why

Subject: Chemistry, asked on 20/9/17

5 th

Subject: Chemistry, asked on 10/9/17

Ti4+,V2+,Mn3+,Cr3+
Which one is d most stable in aqueous solution d why?

Which ion is a strong oxidising agent and why?
Which ion is colourless d why?
Which ion has maximum spin only?

Subject: Chemistry, asked on 9/9/17

Interstitial compounds are covalent or ionic,Why?

Subject: Chemistry, asked on 9/9/17

Q10 and Q9 plz

Subject: Chemistry, asked on 6/9/17

​ Why does k2Cr2O7 show color in spite of 3d0 orbitals?

Subject: Chemistry, asked on 4/9/17

Why is acidic medium required for the oxidising action of potassium dicromate?t

Subject: Chemistry, asked on 29/8/17

Dear experts plz reply fast...
What are the skeletan equation of these ionic equations?...nd plz explain with one example how to convert skeletan eqn into ionic form..

34567
What are you looking for?