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Give reason why a finely divided substance is more effective as an adsorbent.
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What are the factors which influence the adsorption of a gas on a solid?
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Discuss the effect of temperature on the adsorption of gases on solids.
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In the series Sc (Z = 21) to Zn (Z = 30), the enthalpy of atomization of zinc is the lowest, i.e., 126 kJ mol−1. Why?
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Which of the 3d series of the transition metals exhibits the largest number of oxidation states and why?
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The \[\ce{E^{\circ}_{(M^{2+}/M)}}\] value for copper is positive (+0.34 V). What is possible reason for this? (Hint: consider its high ΔaH° and low ΔhydH°)
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How would you account for the irregular variation of ionization enthalpies (first and second) in the first series of the transition elements?
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Why is the highest oxidation state of a metal exhibited in its oxide or fluoride only?
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Which is a stronger reducing agent, Cr2+ or Fe2+ and why?
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Calculate the ‘spin only’ magnetic moment of \[\ce{M^{2+}_{( aq)}}\] ion (Z = 27).
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Explain why Cu+ ion is not stable in aqueous solutions?
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Why are Mn2+ compounds more stable than Fe2+ towards oxidation to their +3 state?
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Explain briefly how +2 state becomes more and more stable in the first half of the first row transition elements with increasing atomic number?
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To what extent do the electronic configurations decide the stability of oxidation states in the first series of the transition elements? Illustrate your answer with examples.
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What may be the stable oxidation state of the transition element with the following d electron configuration in the ground state of its atom?
3d3
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What are the characteristics of the transition elements and why are they called transition elements?
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Which of the d-block elements may not be regarded as the transition elements?
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In what way is the electronic configuration of the transition elements different from that of the non-transition elements?
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How is the variability in oxidation states of transition metals different from that of the non-transition metals? Illustrate with examples.
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How is the variability in oxidation states of transition metals different from that of the non-transition metals? Illustrate with examples.
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