ECAT Chemistry Chapter 17 Transition Elements Online Test With Answers

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ECAT Chemistry Chapter 17 Transition Elements Online Test

Sr. # Questions Answers Choice
1 Which of the following has the maximum number of unpaired d-electrons? Zn Fe<sup>2+</sup> Ni<sup>3+</sup> Cu<sup>+</sup>
2 Which of the following is a carbonate are? Pyrolusite Malchite Diaspore cassiterite
3 Misch mental is An alloy of Aluminium A mixture of chromium and lead chromate An alloy of lanthanoid metals An alloy of copper
4 An element in +3 oxidation state has the electronic configuration (Ar) 3d3. Its atomic number is 24 23 22 21
5 Most common oxidation states shownby cerium are +2, +4 +3, +4 +3, +5 +2, +3
6 Which of the following is obtained when Fe reacts with dil. HNO3? N<sub>2</sub>O NO NO<sub>2</sub> None of these
7 Cuprous ore among the following is Chalcopyites Azurite Cuprite Malachitre
8 Which of the following elements does not show variable oxidation states? Copper Iron Zinc Titanium
9 In an ooctahedral crystal field splitting, the number of orbitals pushed down in energy is 3 2 5 Zero
10 How many mole of acidfied FeSO4solution can be completely oxidized by one mole of KMNO4? 10 5 6 2
11 Across the lanthanide series, the basicity of the lanthanide hydroxides Increases Decreases First increases and then decreases First decreases and then increases
12 Which of the following is not an element? Graphite Diamond 22-Carat gold Rhombic sulphur
13 The protection of steel by chrome plating is due to Cathodic protection Anodic protection Covering of steel surface Formation of alloy with iron
14 What is the shape of Fe(CO)5molecule? Tetrahedral Octahedral Trigonal bipyramidal Square pyramidal
15 Transition metals mostly are Diamagnetic Paramagnetic Neither diamagnetic nor paramagnetic Both diamagnetic and paramagnetic
16 The iron obtained from blast furnace is Pig iron Wrought ion Soft ion Steel
17 In the extraction of iron, slag is produced which is CO FeSiO<sub>3</sub> MgSiO<sub>3</sub> CaSiO<sub>3</sub>
18 The number of unpaired electrons in Fe3+(Z = 26) are 5 6 3 4
19 The number of unpaired electrons in Mn2+is 5 4 3 2
20 Which of the following metals is sometimes found in native state in nature? Al Cu Fe Mg
21 Besides Zn and Cu , German silver contains the metal Sn Ag Ni Mg
22 What is wrong about transition metals? Diamagnetic Paramagnetic Form complexes Shows variable oxidation state
23 Which of the following element is responsible for oxidation of water to O2in biological process? Fe Mn Cu Mo
24 The lanthanides contraction is responsible for the fact that Zr and Y have about the same radius Zr and Nb have similar oxidsation state Zr and Hf have about the same radius Zr and Zn have the same oxidation satete
25 The total number of inner transition elements in the periodic table is 10 14 28 30
26 The equivalent weight of KMnO4(formula weight = M) when it is used as an oxidant in neutral medium is M M/2 M/3 M/5
27 Which of the following is not correct about transition metals? Their melting and boiling points are high Their compounds are generally coloured They can form ionic or covalent compounds They do not exhibit variable valency
28 Stainless steel contains ion and carbon along with Ni and Cr Cr and Co Co and Mn Mn and Ni
29 Which of the following compounds gives red precipitate with AgNO3? Kl K<sub>2</sub>CrO<sub>4</sub> NaBr NaNO<sub>3</sub>
30 Mercury is the only metal which is liquid at 0°C. this is due to its Very high ionization energy and weak metallic bond Low ionization potential High atomic weight High vapour pressure
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