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Chemistry 12th Test -2

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1, Which of the following transition metal oxides is not an insulator?
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2, An example of body centered cube is *
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3, The numbers of tetrahedral voids in the unit cell of a face centered cubic lattice of similar atoms is
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4, Which of the following is a colligative property?
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5, Which of the following solutions have highest freezing point?
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6,Which of the following 0.1 M aqueous solutions will have the lowest freezing point?
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7, The Standard electrode potentials for the half cell reactions are as followsZn ? Zn2+ + 2e– [E° = 0.41 V]Fe ? Fe2+ + 2e– [E° = 0.76 V]
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8, The standard reduction potentials of Cu2+/Cu and Cu2+/Cu+ are 0.337 and 0.153 respectively. The standard electrode potential of Cu+/Cu half cell is *
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9, The standard reduction potentials of X, Y, Z metals are 0.52, -3.03, -1.18 respectively. The order of reducing power of the corresponding metals is:
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10, For a chemical reaction A → B, it is found that the rate of the reaction quardruples when the concentration of A is doubled. The rate expression for the reaction is, rate = k [A]n where the value of n is
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11, On increasing the temperature of the reacting system by 10° the rate of reaction almost becomes double. The most appropriate reason for this is that *
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12, The half-life period of any first order reaction *
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13, The nature of bonding forces in adsorption are
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14, The protective power of a lyophilic sol is
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15, Which one of the following is not applicable to chemisorption?
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16, In the equation 4 M + 8 CN– + 2H2O + O2 → 4 [M(CN)2]– + 4OH–, the metal M is
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17, Pyrolusite is a/an
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18, The isoelectronic pair is *
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19, Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species? *
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20, Which of the following isomers of phosphorus is thermodynamically most stable? *
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21, Which one of the following contains the maximum number of lone pair of electrons on the central atom? *
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22, Among the following molecules:XeO3, XeOF4, XeF6, those containing same number of lone pairs on Xe are:
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23, Oxidizing power of perhalates decreases in the order
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24, There are no S-S bond in
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25, Among the tri halides of Nitrogen, which one is the least basic?
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26, Which of the following oxides is the most acidic?
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27, Which transition metal can show highest oxidation state?
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28, In KMnO4 oxidation number of Mn is *
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29, When KMn04 acts as oxidising agent in alkaline medium, the oxidation number of Mn decreases by *
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30, Ag+ ion is isoelectric with
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31, The transition element with lowest atomic number is
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32, Which of the following oxides is amphoteric in nature? *
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33, Which of the following oxides in acidic in nature? *
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34, The equivalent mass of K2Cr2O7, when it acts as oxidising agent in acidic medium, is equal to
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35, Amongst Ni (CO)4, [Ni(CN)4]2- and NiCl42- *
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36, Which of the following coordination compounds can exhibit coordination iomerism? *
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37, Which of the following compounds can exhibit linkage isomerism? *
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38, Which of the following ligands is a bidentate ligand? *
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39, Which of the following ligands is a tridentate ligand? *
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40, In Ni (CO)4, the nickel atom is ……… hybridised
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41, Ziegler-Natta catalyst is TiCl3 dissolved in
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42, Which of the following are arranged in the decreasing order of dipole moment? *
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43, The reactivity order of halides for dehydrogenation is *
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44, The correct order of boiling points for primary (1°), Secondary (2°) and Tertiery (3°) alcohols is *
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45, The addition of HBr is easiest with *
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