What would be the molality of 20% (mass/mass) aqueous solution of KI? (molar mass of KI = 166 g mol$$^{-1}$$)
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What would be the molality of 20% (mass/mass) aqueous solution of KI? (molar mass of KI = 166 g mol$$^{-1}$$)
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Which one of the following about an electron occupying the 1s orbital in a hydrogen atom is incorrect? (The Bohr radius is represented by a$$_0$$).
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Among the following species, the diamagnetic molecule is:
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At a given temperature T, gases Ne, Ar, Xe and Kr are found to deviate from ideal gas behaviour. Their equation of state is given as $$p = \frac{RT}{V - b}$$ at T. Here, b is the van der Waals constant. Which gas will exhibit steepest increase in the plot of Z (compression factor) vs p?
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During compression of a spring the work done is 10 kJ and 2 kJ escaped to the surroundings as heat. The change in internal energy, $$\Delta U$$ (in kJ) is:
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In an acid-base titration, 0.1 M HCl solution was added to the NaOH solution of unknown strength. Which of the following correctly shows the change of pH of the titration mixture in this experiment?
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The structures of beryllium chloride in the solid state and vapour phase, respectively, are:
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The correct statements among I to III regarding group 13 element oxides are,
(I) Boron trioxide is acidic.
(II) Oxides of aluminum and gallium are amphoteric.
(III) Oxides of indium and thallium are basic.
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The amorphous form of silica is:
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The layer of atmosphere between 10 km to 50 km above the sea level is called as:
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Molal depression constant for a solvent is 4.0 K kg mol$$^{-1}$$. The depression in the freezing point of the solvent for 0.03 mol kg$$^{-1}$$ solution of K$$_2$$SO$$_4$$ is: (Assume complete dissociation of the electrolyte)
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A solution of Ni(NO$$_3$$)$$_2$$ is electrolyzed between platinum electrode 0.1 Faraday electricity. How many mole of Ni will be deposited at the cathode?
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Consider the given plot of enthalpy of the following reaction between A and B.
A + B $$\rightarrow$$ C + D. Identify the incorrect statement.
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10 mL of 1 mM surfactant solution forms a monolayer covering 0.24 cm$$^2$$ on a polar substrate. If the polar head is approximated as a cube, what is its edge length?
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The one that is not a carbonate ore is:
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Assertion: For the extraction of iron, haematite ore is used.
Reason: Haematite is a carbonate ore of iron.
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HF has highest boiling point among hydrogen halides, because it has:
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The maximum number of possible oxidation states of actinoids are shown by:
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The maximum possible denticities of a ligand given below towards a common transition and inner-transition metal ion, respectively, are:
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The correct statements among I to III are:
(I) Valence bond theory cannot explain the color exhibited by transition metal complexes.
(II) Valence bond theory can predict quantitatively the magnetic properties of transition metal complexes.
(III) Valence bond theory cannot distinguish ligands as weak and strong field ones.
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Increasing order of reactivity of the following compounds for S$$_N$$1 substitution is:
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Which of the following potential energy (P.E.) diagrams represents the S$$_N$$1 reaction?
p-Hydroxybenzophenone upon reaction with bromine in carbon tetrachloride gives:
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In the following reaction:
carbonyl compound + MeOH $$\overset{\mathrm{HCl}}{\rightleftharpoons}$$ acetal
Rate of the reaction is the highest for:
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The major product of the following reaction is:
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The major products A and B for the following reactions are, respectively:
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Hinsberg's reagent is:
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Which of the following compounds is a constituent of the polymer
?
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Noradrenaline is a/an:
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The peptide that gives positive ceric ammonium nitrate and carbylamine tests is:
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