ECAT Pre Engineering Chemistry Chapter 11 MCQ Test With Answer

Top Scorers Of ECAT Chemistry Chapter 11 Reaction Kinetics MCQ`s Test

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Abubakar basra 02 - Mar - 2024 05 Min 25 Sec 120/120
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Tanzeel Ur Rehman 29 - May - 2024 06 Min 39 Sec 115/120
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M Umer Arain 10 - Nov - 2024 00 Min 12 Sec 105/120
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Unaiza Usman 23 - Feb - 2024 04 Min 37 Sec 100/120
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Huzaifa Asim 28 - May - 2024 01 Min 53 Sec 95/120
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GOVT. SUFFA EDUCATION CENTER GIRLS MURIDKE 30 - May - 2024 05 Min 44 Sec 90/120
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Haseeb Ahmed 25 - Feb - 2024 10 Min 22 Sec 85/120
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Bilawal Amjad 05 - Mar - 2024 23 Min 27 Sec 80/120
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Maryam Fatima 19 - Mar - 2024 05 Min 45 Sec 75/120
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Mustaqeem 28 - Feb - 2024 11 Min 57 Sec 75/120
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Tamshi Sohail 22 - Apr - 2024 20 Min 02 Sec 75/120
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Shazi Ansari 06 - Jun - 2024 01 Min 59 Sec 70/120
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Muntasir Khokhar 21 - May - 2024 06 Min 02 Sec 70/120
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uzma majeed 11 - Mar - 2024 06 Min 47 Sec 65/120
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Zubair Ayoub 07 - Mar - 2024 09 Min 18 Sec 65/120

Sr.#	Question	Answer
1	The rate of reaction :	A. Decreases as the reaction proceeds B. Increases as the reaction proceeds C. May decrease or increase reaction proceeds D. Remains same as the reaction proceeds
2	Half life period of a first order reaction is independent of:	A. Presence of catalyst. B. Conditions of temperature C. Initial concentration of the compound D. All of above
3	Activation energy is the difference of energy between the energy of the reactant and	A. The product B. The activated complex C. Both a and b D. None of these
4	Which of the following will affect the rate :	A. First step of reaction. B. Last step of reaction. C. Rate determining step. D. Fastest step.
5	A pseudo uni-molecular reaction has order of reaction :	A. 3 B. 2 C. 1 D. 0
6		A. Initial concentration of reaction B. Initial concentration of products C. Final concentration of products D. Order of the reaction
7	In the rate equation when the concentration of reactants are unity, then rate is equal to	A. Instantaneous rate B. Average rate C. Active mass of products D. Specific rate constant
8	Dilatometer method is useful for the reaction that involve :	A. Small volume changes in solutions B. Change in infractive indices C. Where reactants absorb U.V, visible or infrared radiation
9	The number of atoms or molecules whose concentrations determine the rate of the reaction is called	A. Molecularity B. Order C. Rate of reaction D. Rate constant
10	The rate of reaction b/w two specific time intervals is called :	A. Instantaneous rate of reaction. B. Average rate of reaction. C. Rate of a reaction. D. Minimum rate of a reaction.
11	Platinum is poisoned by	A. Arsenic B. Silver C. Argon D. Zinc
12	With the progressive of the reaction the slope of the curve between concentration of product and time	A. Gradually becomes more steep B. Gradually becomes less steep C. No change occurs in slope D. None of these occurs
13	Which statement is not correct	A. Enzymes catalyst a specific reaction B. Enzymes show catalytic activity at a specific temperature C. The catalytic activity of enzymes is stopped if optimum pH is changed D. The catalytic activity is poisoned by a co-enzymes
14	To determine the rate of reaction chemically a graphical method is applied. A graph is plotted between the amount or reactant decomposed or product formed against the time. The rate d_x/d_tat any time is equal to	A. k B. Tangentθ C. 1/a, a is initial conc. D. 1/a²
15	The unit of the rate constant is the same as that of rate of reaction in :	A. Third order reaction B. Second order reaction C. First order reaction D. Zero order reaction
16	Factor which slows down the rate of reaction is	A. Small size of the particles of the reactant B. High temperature of reaction C. More concentration of reactant D. Lowering the temperature
17	The sum of the exponents of the conc. terms in the rate equation is called	A. Rate of reaction B. Order of reaction C. Specific rate constant D. Average rate
18	which one of the following is a heteroheneous catalysis	A. B. C. D.
19	In the manufacture of NH₃by Haber's process catalyst used is iron its catalytic efficiency is poisoned by	A. Presence of Al₂O₃ B. Presence of Cr₂O₃ C. MnO₂ D. CO present with H₂gas
20	When the rate of reaction is entirely independent of the conc. of reaction molecules then order of reaction is	A. Zero B. First C. Second D. Third
21	A zero order reaction is one in which :	A. Rate is not affected by changing concentration of reactants. B. concentration of reactants do not change with the passage of time. C. Reactants do not react. D. One reactants in large excess.
22	In zero order reaction, the rate is independent of :	A. Temperature of reaction B. Concentration ofreactants C. Concentration of products D. None of these.
23	The unit of rate of reaction is	A. mole dm^-3 B. mole Kg^-1 C. moles dm^-3sec^-1 D. grams dm^-3
24		A. Rate = k[FeCl₃] [Kl]² B. Rate = k[Fe⁺³][Cl^-1] [Kl] C. Rate = k[Fe⁺³] [Cl^-1][K;] D. Rate = k[Kl]³[FeCl₃]°
25	A catalyst is a substance which increase the rate of a chemical reaction, but remains unchanged at the end of reaction, nut remains unchanged at the end of reaction, because	A. It increases the temperature B. It increase the surface area C. It increases the rate constant D. It decrease the energy energy of activation
26	The unit rate of constan K ismole^-1 dm³S^-1for a chemical reaction, the order of reaction is :	A. 3 B. 2 C. 1 D. 0
27	Which of the following may affect the rate constant (k) fro a reaction :	A. Change in concentration. B. Change in pressure. C. Change in pH. D. Change in temperature.
28	The reaction rate is expressed in the units of	A. mol dm^-3S^- B. mol dm^-3 C. mol dm^-3N^- D. dm^-3S^-
29	Which one of the following reaction rate is effected by the light	A. B. C. D.
30	When copper is allowed to react with HNO₃, the reaction is slow in the beginning, finally becomes very fast. It is due to the formation of an auto catalyst which is	A. Cu(NO₃)₂ B. CuO C. O₂ D. HNO₂

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ECAT Pre Engineering Chemistry Chapter 11 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 11 Reaction Kinetics

ECAT Chemistry Chapter 11 Reaction Kinetics

The rate constant k of a reaction activation energy Ea and temperature are related by Arrhenius in the form of an equation which is

The reaction rate is expressed in the units of

For effective collisions the molecules slow down before collision and their kinetic energy decreases which results in increase in their

In an experiment the concentration of a reactant 'A' is doubled the rate increases four times. If concentration in tripled, then rate increases nint times. Thus the rate is proportional to ______ of concentration of 'A'

The reaction rate is expressed in the units of

A pseudo uni-molecular reaction has order of reaction :

Group l-A elements react with water fastly than the reaction of group ll-A elements because

The rate of reaction between two specific time intervals is called

Hydrolysis of ethyl-acetate (ester) has order of reaction :

The catalytic activity of Pt is much higher when

In the manufacture of NH3by Haber's process catalyst used is iron its catalytic efficiency is poisoned by

Which of the following will affect the rate :

The rate of reaction :

The rate of reaction is denoted by

A catalyst is a substance which increase the rate of a chemical reaction, but remains unchanged at the end of reaction, nut remains unchanged at the end of reaction, because

The unit rate of constan K ismole-1 dm3S-1for a chemical reaction, the order of reaction is :

Which of the following may affect the rate constant (k) fro a reaction :

It rate law of an equation is written asdx/dt=K[A][B] ?

Half life period of a first order reaction is independent of:

A white precipitate ofsilver chlorideimmediately formed on additionof :

If half life period of a reaction is independent of the concentration of the reactants, then the reaction is

In the rate equation when the concentration of reactants are unity, then rate is equal to

If the rate equation of a reaction 2A+B-------->Products is , Rate = K[A] [B], and A is present in large excess, then order of reaction is :

If initial concentration of the reactants and half life period of the reaction is known, then we can determine

In the reaction of oxalic acid with KMnO4and H2SO4is slow at the beginning but after sometimes the reaction becomes faster due to

For a chemical reaction to take place the particles must have sufficient energy for the effective collisions, the energy is called

Which of the following is not affected by light

Which technique is used to determine the absorption of radiations?

The experimental relationship between a reaction rate and the concentration of reactants is called

If the rate of decay of radioactive isotope decreases from 200 cpm to 25 cpm after 24 hours, what is its half life :

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Top Scorers Of ECAT Chemistry Chapter 11 Reaction Kinetics MCQ`s Test

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In the manufacture of NH₃by Haber's process catalyst used is iron its catalytic efficiency is poisoned by

The unit rate of constan K ismole^-1 dm³S^-1for a chemical reaction, the order of reaction is :

In the reaction of oxalic acid with KMnO₄and H₂SO₄is slow at the beginning but after sometimes the reaction becomes faster due to