Collected questions from chapter 'd Block Elements' are provided in this sections. These questions [ 41 - 66 ] are of objective type and if you are looking for questions from other chapters, you can refer to the related post sections at the bottom of this post. If you know the answers to any of these questions, you can share it with us in the comments section.
41) The general electronic configuration of d-block elements is:
a) $ (n-1)d^{1-10}ns^{0-2} $
b) $ (n-1)d^{1-5}ns^2 $
c) $ (n-1)d^0ns^1 $
d) None of these
42) Formation of coloured ions is possible when compounds contains:
a) paired electrons
b) unpaired electrons
c) lone pairs of electrons
d) none of the above
43) Para-magnetism is common in:
a) p-block elements
b) d-block elements
c) s-block elements
d) f-block elements
44) The color of $ Ti(H_{2}O)_{6}^{3+} $ ion is due:
a) d-d transition
b) presence of water molecules
c) Inter-atomic transfer of electrons
d) None of the above
45) The electronic configuration of chromium is:
a) $ 3d^64s^0 $
b) $ 3d^54s^1 $
c) $ 3d^44s^2 $
d) $ 3d^34s^24p^1 $
46) Para-magnetism is the property of:
a) paired electrons
b) completely filled electronic sub-shells
c) unpaired electrons
d) completely vacant electronic sub-shells
47) d-block elements form coloured ions because:
a) They absorb some energy for d-s transition b) They absorb some energy for p-d transition
c) They absorb some energy for d-d transition d) They do not absorb any energy
48) The correct electronic configuration of copper atom is:
a) $ 3d^{10}4s^1 $
b) $ 3d^{10}4s^2 $
c) $ 3d^{9}4s^2 $
b) $ 3d^{5}4s^24p^4 $
49) Copper is extracted from
a) cuprite b) copper glance c) malachite d) copper pyrites
50) Silver salt used in photography is:
a) $ AgCl $ b) $AgNO_{3} $ c) $ AgF $ d) $AgBr $
51) Sodiumthiosulphate is used in photography because of its:
a) Oxidizing behaviour b) Reducing behaviour c) Complexing behaviour d) Photochemical behaviour
52) Excess of sodium hydroxide reacts with zinc to form:
a) $ ZnH_{2} $
b) $ Na_{2}ZnO_{2} $
c) $ ZnO $
d) $ Zn(OH)_{2} $
53) Which of the following compounds will not give positive chromyl chloride test?
a) $ CuCl_{2} $
b) $ HgCl_{2} $
c) $ ZnCl_{2} $
d) $ C_{6}H_{5}Cl $
54) Which of the ions will give colourless aqueous solution?
a) $ Ni^{2+} $
b) $ Fe^{2+} $
c) $ Cu^{2+} $
d) $ Cu^+ $
55) Which of the following compounds is not coloured?
a) $ Na_{2}CuCl_{4} $
b) $ Na_{2}CdI_{4} $
c) $ K_{4}[Fe(CN)_6] $
d) $ K_{3}[Fe(CN)_6] $
56) In the extraction of Cu, the reaction which does not take place in the Bessemer converter is:
a) $ 2CuFeS_{2}+O_{2} \rightarrow Cu_{2}S+FeS+SO_{2} $
b) $ 2Cu_{2}S+3O_{2} \rightarrow 2Cu_{2}O+FeS+2SO_{2} $
c) $ 2Cu_{2}O+Cu_{2}S \rightarrow 6Cu+SO_{2} $
d) $ 2FeS+3O_{2} \rightarrow 2FeO+2SO_{2} $
57) Select the wrong statement:
a) All cuprous salts are blue in colour b) Transition metals are highly reactive
c) All cuprous salts are white in colour d) Mercury is a liquid metal
58) Choose the wrong statement regarding $ K_{2}Cr_{2}O_{7} $:
a) It is a powerful oxidizing agent b) It is used in tanning industry
c) It is soluble in water d) It reduces ferric sulphate to ferrous sulphate
59) For a transition metal ion, the effective magnetic moment in BM is given by the formula:
a) $ \sqrt{n(n-1)} $
b) $ \sqrt{n(n+1)} $
c) $ \sqrt{n(n+2)} $
d) $ \sqrt{n(n+1)(n+2)} $
60) The correct statement in respect of d-block elements is:
a) They are all metals
b) They show variable valency
c) They form coloured ions and complex salts
d) All above statements are correct
61) Which compound is formed when excess of KCN is added to an aqueous solution of copper sulphate:
a) $ Cu_{2}(CN)_{2} $
b) $ K_{2}[Cu(CN)_{6}] $
c) $ K[Cu(CN)_{2}] $
d) $ Cu_{2}(CN)_{2}+(CN)_{2} $
62) Which of the following has the maximum number of unpaired electrons?
a) $ Mn^{2+} $
b) $ Ti^{3+} $
c) $ V^{3+} $
d) $ Fe^{2+} $
63) Among the following statement, the incorrect one is:
a) Calamine and Siderite are carbonates
b) Argentite and Cuprite are oxides
c) Zinc blende and pyrites are sulphides
d) Malachite and Azurite are ores of copper
64) The chemical composition of slag formed during the smelting process in the extraction of copper is:
a) $ Cu_{2}O+FeS $
b) $ FeSiO_{3} $
c) $ CuFeS_{2} $
d) $ Cu_{2}S+FeO $
65) The transition element with the lowest atomic number is:
a) Scandium
b) Titanium
c) Zinc
d) Lanthanum
66) Which transition element show highest oxidation state:
a) Sc
b) Ti
c) Os
d) Zn
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