ECAT Chemistry Online Test With Answers

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ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Cuprous ore among the following is Chalcopyites Azurite Cuprite Malachitre
2 Which of the following elements does not show variable oxidation states? Copper Iron Zinc Titanium
3 In an ooctahedral crystal field splitting, the number of orbitals pushed down in energy is 3 2 5 Zero
4 How many mole of acidfied FeSO4solution can be completely oxidized by one mole of KMNO4? 10 5 6 2
5 Across the lanthanide series, the basicity of the lanthanide hydroxides Increases Decreases First increases and then decreases First decreases and then increases
6 Which of the following is not an element? Graphite Diamond 22-Carat gold Rhombic sulphur
7 The protection of steel by chrome plating is due to Cathodic protection Anodic protection Covering of steel surface Formation of alloy with iron
8 What is the shape of Fe(CO)5molecule? Tetrahedral Octahedral Trigonal bipyramidal Square pyramidal
9 Transition metals mostly are Diamagnetic Paramagnetic Neither diamagnetic nor paramagnetic Both diamagnetic and paramagnetic
10 The iron obtained from blast furnace is Pig iron Wrought ion Soft ion Steel
11 In the extraction of iron, slag is produced which is CO FeSiO<sub>3</sub> MgSiO<sub>3</sub> CaSiO<sub>3</sub>
12 The number of unpaired electrons in Fe3+(Z = 26) are 5 6 3 4
13 The number of unpaired electrons in Mn2+is 5 4 3 2
14 Which of the following metals is sometimes found in native state in nature? Al Cu Fe Mg
15 Besides Zn and Cu , German silver contains the metal Sn Ag Ni Mg
16 What is wrong about transition metals? Diamagnetic Paramagnetic Form complexes Shows variable oxidation state
17 Which of the following element is responsible for oxidation of water to O2in biological process? Fe Mn Cu Mo
18 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
19 The total number of inner transition elements in the periodic table is 10 14 28 30
20 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
21 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
22 Stainless steel contains ion and carbon along with Ni and Cr Cr and Co Co and Mn Mn and Ni
23 Which of the following compounds gives red precipitate with AgNO3? Kl K<sub>2</sub>CrO<sub>4</sub> NaBr NaNO<sub>3</sub>
24 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
25 Choose the correct answer of transition elements? Transition elements have low melting points Transition elements do not have catalytic activity Transition elements exhibit variable oxidation states Transition elements exhibit inert pair effect
26 Turnbull's blue is a compound called? Ferricyanide Ferrous ferricyanide Ferrous cyanide Ferri - Ferro cyanide
27 Corrosion of iron can be prevented by coating the surface with Zn Sn Ni Any of the above
28 The total number of rare earth elements is 8 32 14 10
29 Among the lanthandes the one obtained by synthetic method is Lu Pm Pr Gd
30 Non-formation of menisus by Hg in presence of O3is due to the formation of Mercuric oxide Mercurous oxide Mercuric chloride Mercurous chloride
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