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Only One Option Correct Type
Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.
Q.
Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them?
(n - 1) d5ns2 attains the maximum oxidation state of+ 7.
Among the following series of transition metal ions, the one where all metal ions have 3d2 electronic configuration is (Atomic number, Ti = 22, V = 23, Cr = 24, Mn = 25)
[AIEEE 2004]
Ti2+,V3+,Cr4+ and Mn5+ show 1s22s22p63s23p64s03d2 electronic configuration.
For the four successive transition elements (Cr, Mn, Fe and Co), the stability of + 2 oxidation state will be there in which of the following order?
Mn2+ (d5) > Cr2+ (d4) > Fe2+ (d6) > Co2+ (d7) Mn2+ is more stable due to half-filled configuration, i . e . d5.
The catalytic activity of transition metals and their compounds is mainly due to
The variability of oxidation state, a characteristic of transition element arises due to incomplete filling of d-orbitals.
Many copper (I) compounds are unstable in aqueous solution and undergo disproportionation as 2Cu+ → Cu + Cu2+ . This is due to
Cu (I) undergoes spontaneous disproportionation.hus, ΔG is negative (spontaneous) for disproportionation.
Gun metal is an alloy of
Gun metal is an alloy of Cu, Zn and Sn. It contains 88% Cu 10% Sn and 2% Zn.
In which of the following pairs both the ions are coloured in aqueous solution? (Atomic number, Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27)
Ni2+ and Ti3+ ions are coloured in aqueous solution because they contain unpaired electrons.
[Ti (H2O)6]3+ absorbs green and yellow region part of visible light. Then the transmitted colour of the compound is
We know that white light is composed of many different colours. When white light is allowed to fall on [Ti(H2O)6]3+ ion, this ion absorbs the light of green and yellow colour and transmits is almost purple colour.The purple colour of the transmitted light is called complimentary colour of that of absorbed light.
Compound of metal ion MX+(Z = 26) has a spin only magnetic moment of BM The number of unpaired electrons and x value in the compound are
Metal ion is Fe3+ which have 5 unpaired electrons.
In which of the following the stability of two oxidation states is correctly represented?
Mn2+ (d5) is more stable than Mn3+(d4) because Mn2+ have half-filled configuration.
Matching List Type
Direction (Q. No. 11-13) Choices fo r the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.
Match the Column I with Column II and mark the correct option from the given codes.
(i) → (s),(ii) → (p),(iii) → (q) (iv) → (r)
(i) → (s), (ii) → (s), (iii) → (p),(iv) → (q)
Fenton’s reagent (Fe SO4 + H2O2) is used for oxidising alcohol to aldehyde. Zeigler-Natta catalyst [AI(C2H5)3 + TiCI4] is used for manufacture of polythene.(i) → (Q). (ii) → (r), (iii) → (s), (iv) → (p)
Statement Type
Direction : This section is based on Statement I and Statement II. Select the correct answer from the codes given below.
Statement l : ,Cu2O and Ni-DMG complex are coloured.
Statement II : It is due to charge transfer transition.
Colours of ,Cu2O and Ni-DMG complex are due to charge transfer transition.(iv) Sodium sulphite is a reducing agent. It reduces acidified K2CrO7 to chromic sulphate which is green in colour.
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