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A first order reaction is 50% completed in 1.26 × 1014 s. How much time would it take for 100% completion?
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Which of the following graphs is correct for a first order reaction?
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State a condition under which a bimolecular reaction is kinetically first order reaction.
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With the help of an example explain what is meant by pseudo first order reaction.
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Extent of physisorption of a gas increases with ______.
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Which of the following is not a favourable condition for physical adsorption?
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Physical adsorption of a gaseous species may change to chemical adsorption with ______.
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In physisorption adsorbent does not show specificity for any particular gas because ______.
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In which of the following reactions heterogenous catalysis is involved?
(a) \[\ce{2SO2 (g) + O2 (g) ->[NO(g)] 2SO3 (g)}\]
(b) \[\ce{2SO2 (g) ->[Pt(s)] 2SO3 (g)}\]
(c) \[\ce{N2 (g) + 3H2 (g) ->[Fe(s)] 2NH3 (g)}\]
(d) \[\ce{CH3COOCH3 (l) + H2O (l) ->[HCI(l)] CH3COOH (aq) + CH3OH (aq)}\]
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Why is it important to have clean surface in surface studies?
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Why is chemisorption referred to as activated adsorption?
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Why do physisorption and chemisorption behave differently with rise in temperature?
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What is the role of activated charcoal in gas mask used in coal mines?
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Give an example where physisorption changes to chemisorption with rise in temperature. Explain the reason for change.
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What is the role of diffusion in heterogenous catalysis?
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Assertion: Detergents with low CMC are more economical to use.
Reason: Cleansing action of detergents involves the formation of micelles. These are formed when the concentration of detergents becomes equal to CMC.
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What is the role of adsorption in heterogenous catalysis?
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Which of the following elements can be involved in pπ – dπ bonding?
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On heating lead nitrate forms oxides of nitrogen and lead. The oxides formed are ______.
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Name three oxoacids of nitrogen. Write the disproportionation reaction of that oxoacid of nitrogen in which nitrogen is in +3 oxidation state.
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