D and F Block Elements MCQ Questions & Answers in Inorganic Chemistry

31. Complete the given reaction.
$$2M{n^{2 + }} + 5\underline {\left( {\text{i}} \right)} + 8{H_2}O \to $$ $$2\underline {\left( {{\text{ii}}} \right)} + 10\underline {\left( {{\text{iii}}} \right)} + 16{H^{^ + }}$$

(i) (ii) (iii)

(a) $$SO_4^{2 - }$$ $$MnO_4^ - $$ $${S_2}O_8^{2 - }$$

(b) $${S_2}O_8^{2 - }$$ $$MnO_4^ - $$ $$SO_4^{2 - }$$

(c) $$MnO_4^ - $$ $${S_2}O_8^{2 - }$$ $$SO_4^{2 - }$$

(d) $${S_2}O_8^{2 - }$$ $$SO_4^{2 - }$$ $$MnO_4^ - $$

	(i)	(ii)	(iii)
(a)	$$SO_4^{2 - }$$	$$MnO_4^ - $$	$${S_2}O_8^{2 - }$$
(b)	$${S_2}O_8^{2 - }$$	$$MnO_4^ - $$	$$SO_4^{2 - }$$
(c)	$$MnO_4^ - $$	$${S_2}O_8^{2 - }$$	$$SO_4^{2 - }$$
(d)	$${S_2}O_8^{2 - }$$	$$SO_4^{2 - }$$	$$MnO_4^ - $$

A (a)

B (b)

C (c)

D (d)

32. The melting point of copper is higher than that of zinc because

A the $$s, p$$ as well as $$d$$ - electrons of copper are involved in metallic bonding

B the atomic volume of copper is higher

C the $$d$$ - electrons of copper are involved in metallic bonding

D the $$s$$ as well as $$d$$ - electrons of copper are involved in metallic bonding

33. Lanthanoid contraction can be observed in

A $$At$$

B $$Gd$$

C $$Ac$$

D $$Lw$$

34. Which of the following processes does not involve oxidation of iron?

A Rusting of iron sheets

B Decolourisation of blue $$CuS{O_4}$$ solution by iron

C Formation of $$Fe{\left( {CO} \right)_5}$$ from $$Fe$$

D Liberation of $${H_2}$$ from steam by iron a high temperature

35. Lanthanides and actinides resemble in

A electronic configuration

B oxidation state

C ionisation energy

D formation of complexes

36. What is the total number of inner transition elements in the periodic table?

A 10

B 14

C 30

D 28

37. Gadolinium belongs to $$4f$$ series. It’s atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?

A $$\left[ {Xe} \right]4{f^8}6{d^2}$$

B $$\left[ {Xe} \right]4{f^9}5{s^1}$$

C $$\left[ {Xe} \right]4{f^7}5{d^1}6{s^2}$$

D $$\left[ {Xe} \right]4{f^6}5{d^2}6{s^2}$$

38. Which of the following forms stable $$+ 4$$ oxidation state ?

A $$La\left( {Z = 57} \right)$$

B $$Eu\left( {Z = 63} \right)$$

C $$Ce\left( {Z = 58} \right)$$

D $$Gd\left( {Z = 64} \right)$$

39. Following order is observed in oxidising power of certain ions : $$VO_2^ + < C{r_2}O_7^{2 - } < MnO_4^ - $$
The reason for this increasing order of oxidising power is

A increasing stability of the lower species to which they are reduced

B increasing stability of the higher species to which they are oxidised

C increasing stability of the higher species to which they are reduced

D increasing stability of the lower species to which they are oxidised

40. When concentrated $$HCl$$ is added to an aqueous solution of $$CoC{l_2},$$ its colour changes from reddish pink to deep blue. Which complex ion gives blue colour in this reaction ?

A $${\left[ {CoC{l_4}} \right]^{2 - }}$$

B $${\left[ {CoC{l_6}} \right]^{3 - }}$$

C $${\left[ {CoC{l_6}} \right]^{4 - }}$$

D $${\left[ {Co{{\left( {{H_2}O} \right)}_6}} \right]^{2 + }}$$

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D and F Block Elements MCQ Questions & Answers in Inorganic Chemistry | Chemistry