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1. The reaction \(2X + Y \rightarrow 3Z\) was studied and the following data were obtained: 

Experiment	X	Y	Rate (mole/liter.sec)
1	3.0	1.5	1.8
2	1.5	3.0	0.90
3	1.5	1.5	0.45

What is the proper rate expression? 
1. \(rate =k[\mathrm{X}][\mathrm{Y}] \)
2. \(rate =k[\mathrm{Y}]^2 \)
3. \( rate =k[\mathrm{X}] \)
4. \(rate =k[\mathrm{X}]^2[\mathrm{Y}]\)

2. Which of the following is the overall order of a reaction, based on the data given below?

	(A)	(B)	Rate of reaction
Exp-1	0.1	0.1	\(6\times10^{-1}\)
Exp-2	0.3	0.2	\(72\times10^{-1}\)
Exp-3	0.3	0.4	\(288\times10^{-1}\)
Exp-4	0.4	0.1	\(24\times10^{-1}\)

 

1.	Four (4)	2.	Three (3)
3.	One (1)	4.	Six (6)

3. For the given reaction, C₃H₈ + 5O₂ → 3CO₂ + 4H₂O, how does the rate of disappearance of O₂ compare to the rate of production of CO₂? 

1.	same as the rate of production of CO2
2.	\(\dfrac{1}{5}\) the rate of production of CO2
3.	\(\dfrac{3}{5}\) the rate of production of CO2
4.	\(\dfrac{5}{3}\) the rate of production of CO2

4. Which of the following plot represents the variation of \(ln ~k\) versus \(\frac 1{T}\) according to the Arrhenius equation?

1.		2.
3.		4.

5. Ratio of the times required to reach 99% completion (\(\mathrm { t_{99} }\)) and 90% completion (\(\mathrm { t_{90} }\)) for a first-order reaction is:

1.	2	2.	4
3.	0	4.	5

6. An example of a pseudo-first-order reaction among the following is:

1.	Inversion of cane sugar
2.	Radioactive decay
3.	Hydrogenation of ethene
4.	Decomposition of gaseous ammonia on a hot platinum surface at high pressure

7. Which of the following rate laws has an overall order of 0.5 for the reaction A + B + C  \(\rightarrow\)  product?
 

1.	\(k[A][B][C]^{0.5}\)	2.	\(k[A]^{0.5}[B]^{0.5}[C]^{0.5}\)
3.	\(k[A]^{1.5}[B]^{-1}[C]^0\)	4.	\(k[A][B]^0[C]^{0.5}\)

8.

An incorrect statement regarding a catalyst is:

1.	It catalyzes the forward and backward reactions to the same extent.
2.	It alters the Gibbs free energy of the reaction.
3.	It is a substance that does not change the equilibrium constant of a reaction.
4.	It provides an alternate mechanism by reducing activation energy between reactants and products.

9. Which of the following statements are correct for a balanced chemical equation of an elementary reaction?
(i) The reaction order is equal to its molecularity.
(ii) The reaction order is lower than its molecularity.
(iii) The reaction order is greater than its molecularity.
(iv) Molecularity can never be zero.

1.	(i), (iv)	2.	(ii), (iii)
3.	(iv), (iii)	4.	(i), (iii)

10.

If 'a' is the initial concentration of a substance that reacts according to zero-order kinetics and k is the rate constant, then the time for the reaction to go to completion is:
1. a/k
2. 2/ka
3. k/a
4. 2k/a