d- and f-Block Elements

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

1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct

Given below are two statements for catalytic properties of transition metals. In the light of the above statements, choose the correct answer from the options given below :

1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct

The correct statements among the following are : Choose the correct answer from the options given below :

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

The correct order of first ( iH1) and second ( iH2) ionisation enthalpy values of Cr and Mn are : Choose the correct answer from the options given below :

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

Which of the following is NOT a physical or chemical characteristics of interstitial compounds?

1. They have high melting points, higher than those of pure metals.
2. They are very soft and ionic in nature.
3. They retain metallic conductivity.
4. They are chemically inert and usually non-stoichiometric.

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

1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct

The correct statements among the following are, Choose the correct answer from the options given below :

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

Correct statements from the following are Choose the correct answer from the options given below :

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

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

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

Pairs of elements with the same number of electrons in their respective 4f orbital are [Atomic number. Eu-63, Gd-64, Dy-66, Ho-67, Tm-69, Yb-70, Lu-71, Hf-72] Choose the correct answer from the options given below :

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

Consider |x| is the difference in oxidation states of Mn in highest manganese fluoride and highest manganese oxide. The ions with |x| number of unpaired electrons from the following are : Choose the correct answer from the options given below :

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

Which of the following sets includes all the species that will change the orange colour of K2Cr2O7 in acidic medium ?

1. Fe2+, Sn2+, I-, S2-
2. S2-, Fe3+, I-, C2O42-
3. Fe2+, NO2-, SO2, Sn4+
4. Fe3+, SO42-, S2-, Sn4+

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

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

Among Fe2+, Fe3+, Cr2+ and Zn2+, the ion that shows positive borax bead test and with highest ionisation enthalpy is :

1. Fe2+
2. Zn2+
3. Cr2+
4. Fe3+

Number of paramagnetic ions among the following d- and f-block metal ions is . Mn2+, Cu2+, Zn2+, Yb2+, Sc3+, La3+, Gd3+, Lu3+, Ti4+, Ce4+ (Atomic number of Mn = 25, Cu = 29, Zn = 30, Yb = 70, Sc = 21, La = 57, Gd = 64, Lu = 71, Ti = 22, Ce = 58)

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

Consider the following statements about manganate and permanganate ions. Identify the correct statements. Choose the correct answer from the options given below :

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

"X" is an oxoanion of the lightest element of group 7 (in the periodic table). The metal is in +6 oxidation state in "X". The color of the potassium salt of X is

1. purple
2. orange
3. yellow
4. green

The oxidation state of chromium in the final product formed in the reaction between KI and acidified K2Cr2O7 solution is :

1. +2
2. +3
3. +4
4. +6

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 the following oxides of 3d elements, the number of mixed oxides are . Ti2O3, V2O4, Cr2O3, Mn3O4, Fe3O4, Fe2O3, Co3O4

MnO42-, in acidic medium, disproportionates to :

1. MnO4- and MnO
2. MnO4- and MnO2
3. Mn2O7 and MnO2
4. Mn2O7 and MnO

Consider the following reactions : NaCl + K2Cr2O7 + H2SO4 A + KHSO4 + NaHSO4 + H2O A + NaOH B + NaCl + H2O B + H2SO4 + H2O2 C + Na2SO4 + H2O In the product 'C', 'X' is the number of O22- units, 'Y' is the total number of oxygen atoms present and 'Z' is the oxidation state of Cr. The value of X + Y + Z is .

Given below are some of the statements about Mn and Mn2O7. Identify the correct statements. Choose the correct answer from the options given below :

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

The correct decreasing order of spin only magnetic moment values (BM) of Cu+, Cu2+, Cr2+ and Cr3+ ions is :

1. Cr3+ > Cr2+ > Cu+ > Cu2+
2. Cu+ > Cu2+ > Cr3+ > Cr2+
3. Cr2+ > Cr3+ > Cu2+ > Cu+
4. Cu2+ > Cu+ > Cr2+ > Cr3+

The first transition series metal 'M' has the highest enthalpy of atomisation in its series. One of its aquated ions ( Mn+) exists in green colour. The nature of the oxide formed by the above Mn+ ion is:

1. basic
2. neutral
3. amphoteric
4. acidic

The number of valence electrons present in the metal among Cr, Co, Fe and Ni which has the lowest enthalpy of atomisation is :

1. 10
2. 6
3. 9
4. 8

'X' is the number of acidic oxides among VO2, V2O3, CrO3, V2O5 and Mn2O7. The primary valency of cobalt in [Co(H2NCH2CH2NH2)3]2(SO4)3 is Y. The value of X + Y is .

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

Pair of transition metal ions having the same number of unpaired electrons is

1. Ti3+, Mn2+
2. Ti2+, Co2+
3. Fe3+, Cr2+
4. V2+, Co2+

KMnO4 acts as an oxidising agent in acidic medium. 'X' is the difference between the oxidation states of Mn in reactant and product. 'Y' is the number of 'd' electrons present in the brown red precipitate formed at the end of the acetate ion test with neutral ferric chloride. The value of X + Y is .