d- and f-Block Elements

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