d- and f-Block Elements

The incorrect relationship in the following pairs in relation to ionisation enthalpies is :

1. Mn2+ < Fe2+
2. Mn+ < Mn2+
3. Mn+ < Cr+
4. Fe2+ < Fe3+

The metal ions that have the calculated spin-only magnetic moment value of 4.9 B.M. are : Choose the correct answer from the options given below:

1. A, D and E Only
2. A, B and E Only
3. A, C and E Only
4. B and E Only

Consider the following reactions A + Little amountNaCl + H2SO4 CrO2Cl2 + Side Products CrO2Cl2(Vapour) + NaOH B + NaCl + H2O B + H+ C + H2O The number of terminal 'O' present in the compound 'C' is

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below

1. Statement I is true but Statement II is false
2. Both Statement I and Statement II are true
3. Both Statement I and Statement II are false
4. Statement I is false but Statement II is true

Among Sc, Mn, Co and Cu, identify the element with highest enthalpy of atomisation. The spin only magnetic moment value of that element in its +2 oxidation state is BM (in nearest integer).

The spin-only magnetic moment value of Mn+ ion formed among Ni, Zn, Mn and Cu that has the least enthalpy of atomisation is . (in nearest integer) Here n is equal to the number of diamagnetic complexes among K2[NiCl4], [Zn(H2O)6]Cl2, K3[Mn(CN)6] and [Cu(PPh3)3I]

The correct option with order of melting points of the pairs (Mn, Fe), (Tc, Ru) and (Re, Os) is :

1. Fe < Mn, Ru < Tc and Re < Os
2. Fe < Mn, Ru < Tc and Os < Re
3. Mn < Fe, Tc < Ru and Re < Os
4. Mn < Fe, Tc < Ru and Os < Re

The molar mass of the water insoluble product formed from the fusion of chromite ore (FeCr2O4) with Na2CO3 in presence of O2 is g mol-1.

Consider 'n' is the number of lone pair of electrons present in the equatorial position of the most stable structure of ClF3. The ions from the following with 'n' number of unpaired electrons are Choose the correct answer from the options given below:

1. B and D Only
2. A, D and E Only
3. B and C Only
4. A and C Only

Which of the following oxidation reactions are carried out by both K2Cr2O7 and KMnO4 in acidic medium? Choose the correct answer from the options given below :

1. A, B and C Only
2. C, D and E Only
3. B, C and D Only
4. A, D and E Only

The amphoteric oxide among V2O3, V2O4 and V2O5, upon reaction with alkali leads to formation of an oxide anion. The oxidation state of V in the oxide anion is :

1. + 4
2. + 5
3. + 3
4. + 7

The spin only magnetic moment ( ) value (B.M.) of the compound with the strongest oxidising power among Mn2O3, TiO and VO is B.M. (Nearest integer).

Preparation of potassium permanganate from MnO2 involves two step process in which the 1st step is a reaction with KOH and KNO3 to produce

1. K3MnO4
2. K4[Mn(OH)6]
3. K2MnO4
4. KMnO4

Which of the following ions is the strongest oxidizing agent? (Atomic Number of Ce = 58, Eu = 63, Tb = 65, Lu = 71)

1. Lu3+
2. Eu2+
3. Tb4+
4. Ce3+

Match List - I with List - II. Choose the correct answer from the options given below :

1. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
2. (A)-(II), (B)-(IV), (C)-(I), (D)-(III)
3. (A)-(III), (B)-(I), (C)-(II), (D)-(IV)
4. (A)-(IV), (B)-(II), (C)-(III), (D)-(I)

The correct set of ions (aqueous solution) with same colour from the following is:

1. V2+, Cr3+, Mn3+
2. Ti4+, V4+, Mn2+
3. Sc3+, Ti3+, Cr2+
4. Zn2+, V3+, Fe3+

Match List - I with List - II Choose the correct answer from the options given below :

1. A-IV, B-II, C-III, D-I
2. A-IV, B-III, C-I, D-II
3. A-III, B-I, C-IV, D-II
4. A-III, B-IV, C-II, D-I

Consider the following reactions K2Cr2O7 [-H2O]KOH [A] [-H2O]H2SO4 [B] + K2SO4 The products [A] and [B], respectively are :

1. K2Cr(OH)6 and Cr2O3
2. K2CrO4 and Cr2O3
3. K2CrO4 and K2Cr2O7
4. K2CrO4 and CrO

Lanthanoid ions with 4f7 configuration are : Choose the correct answer from the options given below :

1. B and E only
2. B and C only
3. A and D only
4. A and B only

The electronic configuration of Cu(II) is 3d9 whereas that of Cu(I) is 3d10. Which of the following is correct?

1. Cu(II) is more stable
2. Cu(II) is less stable
3. Cu(I) and Cu(II) are equally stable
4. Stability of Cu(I) and Cu(II) depends on nature of copper salts

Number of colourless lanthanoid ions among the following is . Eu3+, Lu3+, Nd3+, La3+, Sm3+

The electronic configuration of Einsteinium is : (Given atomic number of Einsteinium = 99)

1. [Rn]5f136d07s2
2. [Rn]5f126d07s2
3. [Rn]5f116d07s2
4. [Rn]5f106d07s2

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

1. Statement I is true but Statement II is false
2. Both Statement I and Statement II are false
3. Both Statement I and Statement II are true
4. Statement I is false but Statement II is true

A transition metal 'M' among Sc, Ti, V, Cr, Mn and Fe has the highest second ionisation enthalpy. The spin-only magnetic moment value of M+ ion is BM (Nearest integer) (Given atomic number Sc : 21, Ti : 22, V : 23, Cr : 24, Mn : 25, Fe : 26)

Iron (III) catalyses the reaction between iodide and persulphate ions, in which Choose the most appropriate answer from the options given below:

1. B and C only
2. A only
3. A and D only
4. B only

The 'spin only' magnetic moment value of MO42- is BM. (Where M is a metal having least metallic radii. among Sc, Ti, V, Cr, Mn and Zn). (Given atomic number: Sc = 21, Ti = 22, V = 23, Cr = 24, Mn = 25 and Zn = 30)

The equilibrium Cr2O72- 2CrO42- is shifted to the right in :

1. a weakly acidic medium
2. a basic medium
3. a neutral medium
4. an acidic medium

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

1. Statement I is false but Statement II is true
2. Statement I is true but Statement II is false
3. Both Statement I and Statement II are false
4. Both Statement I and Statement II are true

The number of elements from the following that do not belong to lanthanoids is Eu, Cm, Er, Tb, Yb and Lu

1. 3
2. 1
3. 4
4. 5

The difference in the 'spin-only' magnetic moment values of KMnO4 and the manganese product formed during titration of KMnO4 against oxalic acid in acidic medium is BM. (nearest integer)