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The ionization energy of gaseous Na atoms is 495.5 kJ mol$$^{-1}$$. The lowest possible frequency of light that ionizes a sodium atom is (h = $$6.626 \times 10^{-34}$$ Js, N$$_A$$ = $$6.022 \times 10^{23}$$ mol$$^{-1}$$)
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Which one of the following has the largest ionic radius?
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Which one of the following molecules is paramagnetic?
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Sulphur dioxide and oxygen were allowed to diffuse through a porous partition. 20 dm$$^3$$ of SO$$_2$$ diffuses through the porous partition in 60 seconds. The volume of O$$_2$$ in dm$$^3$$ which diffuses under the similar condition in 30 seconds will be (atomic mass of sulphur = 32 u):
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For the decomposition of the compound, represented as NH$$_2$$COONH$$_4$$(s) $$\rightleftharpoons$$ 2NH$$_3$$(g) + CO$$_2$$(g), the K$$_p$$ = $$2.9 \times 10^{-5}$$ atm$$^3$$. If the reaction is started with 1 mole of the compound, the total pressure at equilibrium would be:
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Zirconium phosphate [Zr$$_3$$(PO$$_4$$)$$_4$$] dissociates into three zirconium cations of charge +4 and four phosphate anions of charge $$-3$$. If molar solubility of zirconium phosphate is denoted by s and its solubility product by K$$_{sp}$$ then which of the following relationship between s and K$$_{sp}$$ is correct?
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How many electrons are involved in the following redox reaction?
Cr$$_2$$O$$_7^{2-}$$ + Fe$$^{2+}$$ + C$$_2$$O$$_4^{2-}$$ → Cr$$^{3+}$$ + Fe$$^{3+}$$ + CO$$_2$$ (Unbalanced)
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Consider the reaction: H$$_2$$SO$$_{3(aq)}$$ + Sn$$^{4+}_{(aq)}$$ + H$$_2$$O$$_{(l)}$$ → Sn$$^{2+}_{(aq)}$$ + HSO$$^-_{4(aq)}$$ + 3H$$^+_{(aq)}$$. Which of the following statements is correct?
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Amongst LiCl, RbCl, BeCl$$_2$$ and MgCl$$_2$$ the compounds with the greatest and the least ionic character, respectively are:
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Example of a three-dimensional silicate is:
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Which of these statements is not true?
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The correct IUPAC name of the following compound is:
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The total number of octahedral void(s) per atom present in a cubic close packed structure is:
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For an ideal solution of two components A & B, which of the following is true?
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The observed osmotic pressure for a 0.10 M solution of Fe(NH$$_4$$)$$_2$$(SO$$_4$$)$$_2$$ at 25 °C is 10.8 atm. The expected and experimental (observed) values of Van't Hoff factor 'i' will be respectively; (R = 0.082 L atm k$$^-$$ mol$$^{-1}$$)
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Choose the correct statement with respect to the vapour pressure of a liquid among the following:
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For the reaction, 3A + 2B → C + D, the differential rate law can be written as:
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Which one of the following ores is known as Malachite:
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An octahedral complex with molecular composition M.5NH$$_3$$.Cl.SO$$_4$$ has two isomers, A and B. The solution of A gives a white precipitate with AgNO$$_3$$ solution and the solution of B gives white precipitate with BaCl$$_2$$ solution. The type of isomerism exhibited by the complex is:
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Nickel (Z = 28) combines with a uninegative monodentate ligand to form a diamagnetic complex [NiL$$_4$$]$$^{2-}$$. The hybridisation involved and the number of unpaired electrons present in the complex are respectively:
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Amongst the following, identify the species with an atom in +6 oxidation state.
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The major product formed when 1, 1, 1-trichloropropane is treated with aqueous potassium hydroxide is:
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Which of the following compounds will not be soluble in sodium bicarbonate?
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Which one of the following substituents at para-position is most effective in stabilizing the phenoxide ion?
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Williamson synthesis of ether is an example of:
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The final product formed when methylamine is treated with NaNO$$_2$$ and HCl followed by hydrolysis is:
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In a set of reactions p-nitrotoluene yielded a product E.
The product E would be:
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Which one of the following is an example of thermosetting polymer?
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Among the following organic acids, the acid present in rancid butter is:
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The reason for double helical structure of DNA is the operation of:
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