question_answer3) A solution of (−)−1 − chloro − 1− phenylethane in toluene racemises slowly in the presence of a small amount of \[SbC{{l}_{5}},\] due to the formation of:
AIEEE Solevd Paper-2013
question_answer4) Given: \[E_{C{{r}^{3+}}/Cr}^{0}=-0.74V;\] \[E_{MnO_{4}^{-}/M{{n}^{2+}}}^{0}\text{=}1.51\text{ }V\] \[E_{C{{r}_{2}}o_{7}^{2-}/C{{r}^{3+}}}^{0}\text{=}1.33\text{ }V;\] \[E_{Cl/C{{l}^{-}}}^{0}\text{=}1.36\text{ }V\] Based on the data given above, strongest oxidizing agent will be:
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question_answer5) A piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of\[37.0{}^\circ C.\] As it does so, it absorbs 208 J of heat. The values of q and w for the process will be: \[(R=8.314\text{ }J/mol\text{ }K)\text{ }(ln\text{ }7.5=2.01)\]
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question_answer8) For a gaseous state, if most probable speed I denoted by \[{{C}^{*}}\], average speed by\[\overline{C}\]and mean square speed by C, then for a large number of molecules the ratios of these speeds are:
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question_answer9) The rate of a reaction doubles when its temperature changes from 300 K to 310 K. Activation of such a reaction will be: (\[R=8.314\text{ }J{{K}^{-1}}\]and\[log2=0.301\])
AIEEE Solevd Paper-2013
question_answer10) A compound with molecular mass 180 is acylated with\[C{{H}_{3}}COCl\]to get a compound with molecular mass 390. The number of amino groups present per molecule of the former compound is:
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question_answer13) Consider the following reaction: \[xMnO_{4}^{-}+y{{C}_{2}}O_{4}^{2-}+z{{H}^{+}}\to xM{{n}^{2+}}+2yC{{O}_{2}}+\frac{z}{2}{{H}_{2}}O\] The values of x, y and z in the reaction are, respectively:
AIEEE Solevd Paper-2013
question_answer15) A gaseous hydrocarbon gives upon combustion 0.72 g. of water and 3.08 g of \[C{{O}_{2}}.\]The empirical formula of the hydrocarbon is:
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question_answer19) The coagulating power of electrolytes having ions\[N{{a}^{+}},\text{ }A{{l}^{3+}}\]and\[B{{a}^{2+}}\]for arsenic sulphide sol increases in the order:
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question_answer20) Which of the following represents the correct order of increasing first ionization enthalpy for\[Ca,Ba,S,Se\]and\[Ar\]?
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question_answer21) Energy of an electron is given by\[E=-2.178\times \]\[{{10}^{18}}J\left( \frac{{{Z}^{2}}}{{{n}^{2}}} \right)\]. Wavelength of light required to excite an electron in an hydrogen atom from level n = 1 to n = 2 will be: (\[h=6.62\times {{10}^{-34}}Js\]and\[c=3.0\times {{10}^{-8}}m{{s}^{-1}}\])
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question_answer22) Compound (A),\[{{C}_{8}}{{H}_{9}}Br,\]gives a white precipitate when warmed with alcoholic \[AgN{{O}_{3}}.\] Oxidation of (A) gives an acid (B) , \[{{C}_{8}}{{H}_{6}}{{O}_{4}}.\](B) easily forms anhydride on heating. Identify the compound (A) .
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question_answer23) Four successive members of the first row transition elements are listed below with atomic numbers. Which one of them is expected to have the highest\[E_{{{M}^{3+}}/{{M}^{2+}}}^{0}\]value?
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question_answer24) How many litres of water must be added to 1 litre of an aqueous solution of HCl with a pH of 1 to create an aqueous solution with pH of 2?
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question_answer26) An organic compound A upon reacting with \[N{{H}_{3}}\]gives B. On heating, B gives C. C in presence of\[KOH\]reacts with\[B{{r}_{2}}\]to give \[C{{H}_{3}}C{{H}_{2}}N{{H}_{2}}.\]A is:
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question_answer28) An unknown alcohol is treated with the 'Lucas reagent' to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism:
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question_answer30) Experimentally it was found that a metal oxide has formula\[{{M}_{0}}{{.}_{98}}O.\]Metal M, is present as\[{{M}^{2+}}\]and\[{{M}^{3+}}\]in its oxide. Fraction of the metal which exists as\[{{M}^{3+}}\]would be:
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