8. TRANSITION AND INNER TRANSITION ELEMENTS

1. Choose the most correct option.

i. Which one of the following is diamagnetic
a. Cr2⊕

b. Fe3⊕
c. Cu2⊕

d. Sc3⊕

Solution

ii. Most stable oxidation state of Titanium is
a. +2

b. +3
c. +4

d. +5

Solution

iii. Components of Nichrome alloy are are
a. Ni, Cr, Fe

b. Ni, Cr, Fe, C
c. Ni, Cr

d. Cu, Fe

Solution

iv. Most stable oxidation state of Ruthenium is
a. +2

b. +4
c. +8

d. +6

Solution

v. Stable oxidation states for chromium are
a. +2, +3

b. +3, +4
c. +4, +5

d. +3, +6

Solution

vi. Electronic configuration of Cu and Cu+1
a. 3d10, 4s0; 3d9, 4s0
b. 3d9, 4s1; 3d94s0

c. 3d10, 4s1; 3d10, 4s0
d. 3d8, 4s1; 3d10, 4s0

Solution

vii. Which of the following have d0s0 configuration
a. Sc3⊕

b. Ti4⊕
c. V5⊕

d. all of the above

Solution

viii. Magnetic moment of a metal complex is 5.9 B.M. Number of unpaired electrons in the complex is
a. 2

b. 3
c. 4

d. 5

Solution

ix. In which of the following series all the elements are radioactive in nature
a. Lanthanoids
b. Actinoids
c. d-block elements
d. s-block elements

Solution

x. Which of the following sets of ions contain only paramagnetic ions
a. Sm3⊕, Ho3⊕, Lu3⊕
b. La3⊕, Ce3⊕, Sm3⊕
c. La3⊕, Eu3⊕, Gd3⊕
d. Ce3⊕, Eu3⊕, Yb3⊕

Solution

xi. Which actinoid, other than uranium, occur in significant amount naturally?
a. Thorium

b. Actinium
c. Protactinium

d. Plutonium

Solution

xii. The flux added during extraction of Iron from hematite are its?
a. Silica
b. Calcium carbonate
c. Sodium carbonate
d. Alumina.

Solution

2. Answer the following

i What is the oxidation state of Manganese in (i) MnO4 2- (ii) MnO4
– ?

Solution

ii. Give uses of KMnO4

Solution

iii. Why salts of Sc3⊕, Ti4⊕, V5⊕ are colourless ?

Solution

iv. Which steps are involved in manufacture of potassium dichromate from chromite ore ?

Solution

v. Balance the following equation
(i)KMnO4+H2C2O4+H2SO4 MnSO4 +  K2SO4 + H2O + O2
(ii) K2Cr2O7 + KI + H2SO4 K2SO4 + Cr2(SO4)3 + 7H2O + 3I2.

Solution

vi. What are the stable oxidation states of plutonium, cerium, manganese, Europium ?

Solution

vii. Write electronic configuration of chromium and copper

Solution

viii. Why nobelium is the only actinoid with +2 oxidation state?

Solution

ix. Explain with the help of balanced chemical equation, why the solution of Ce(IV) is prepared in acidic medium.

Solution

x. What is meant by ‘shielding of electrons’ in an atom?

Solution

xi. The atomic number of an element is 90. Is this element diamagnetic or paramagnetic?

Solution

3. Answer the following

i. Explain the trends in atomic radii of d block elements

Solution

ii. Name different zones in the Blast furnace. Write the reactions taking place in them.

Solution

iii. What are the differences between cast iron, wrought iron and steel ?

Solution

iv. Iron exhibits +2 and +3 oxidation states. Write their electronic configuration. Which will be more stable ? Why ?

Solution

v. Give the similarities and differences in elements of 3d, 4d and 5d series.

Solution

vi. Explain trends in ionisation enthalpies of d block elements.

Solution

vii. What is meant by diamagnetic and paramagnetic metal ? Give one example
of diamagnetic and paramagnetic transition metal and lanthanoid metal.

Solution

viii.Why the ground-state electronic configurations of gadolinium and lawrentium are different than expected?

Solution

ix. Write steps involved in metallurgical process

Solution

x. Cerium and Terbium behaves as good oxidising agents in +4 oxidation state. Explain.

Solution

xi. Europium and Ytterbium behave as od reducing agents in +2 oxidation tate explain.

Solution