Which catalyst is used to prepare propylene oxide from the reaction between propylene and dioxygen ?
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Chemical Kinetics MCQs for NEET — Chemistry Questions with Answers
Practice free Chemical Kinetics (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
On which factor activity of catalyst depends ?
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$ CO_{(g)} + H_{2(g)} \rightarrow x $ what is X ?
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How many times reaction rate increase by catalyst ?
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The beans are cooked earlier in pressure cooker, because
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Explanation
(a)
The beans are cooked earlier in the pressure cooker because the boiling point increases with increasing pressure.
The catalyst used in Bosch process of manufacture of H2 is:
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Explanation
(d)
In this process water gas (CO + H2, prepared from coal and water at 1270 K) is mixed with two times its volume of steam passed over catalyst Fe2O3, in the presence of promoter Cr2O3 or ThO2 at 773 K giving products CO2 and H2.
CO2 is dissolved in water under pressure (20 to 25 atm) and is removed leaving behind un dissolved H2.
For a certain reaction a plot of [(c0-c)/c] against time t, yields a straight line. c0 and c are concentrations of reactant at t = 0 and t = t respectively. The rate of reaction is:
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Explanation
(d) For II order reaction (c0-c)/c = K.t.c0.
Hydrogenation of vegetable ghee at 250C reduces pressure of H2 from 2 atom to 1.2 atom in 50 minute. The rate of reaction in terms of molarity per second is:
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Explanation
(b) The change in molarity=n/V = P/RT = 0.8/(0.0821*298) = 0.0327
rate of reaction = change in molarity per sec = 0.0327/(50*60)=1.09*10-5 mil litre-1 sec-1
A hypothetical reaction, A2 +B2 2AB mechanism as given below;
A2 A+ A ............(Fast)
A+B2 → AB + B ............(Slow)
A+ B → AB ............(Fast)
The order of the overall reaction is:
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Explanation
(c) r = k[A][B2]
and Kc = [A][A]/[A2] or [A] = k1/2c [A2]1/2
Thus, r = k . k1/2c [A2]1/2[B2] = k'[A2]1/2[B2]
Following mechanism has been proposed for a reaction,
2A+B D+E
A+B C+D ...(Slow)
A+ C E ...(Fast)
The rate law expression for the reaction is:
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Explanation
(b) The rate expression is derived for slowest step of mechanism.
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