ECAT Chemistry Chapter 11 Reaction Kinetics With Answers

ECAT Chemistry Chapter 11 Reaction Kinetics

Sr. # Questions Answers Choice
1

A white precipitate ofsilver chlorideimmediately formed on additionof :

 Silver nitrate solution to sodium chloride solution. Silver chloride solution to sodium nitrate solution. Silver nitrate solution to potassium chloride solution Silver nitrate solution to hydrogen chloride solution.
2

A white precipitate ofsilver chlorideimmediately formed on additionof :

 Silver nitrate solution to sodium chloride solution. Silver chloride solution to sodium nitrate solution. Silver nitrate solution to potassium chloride solution Silver nitrate solution to hydrogen chloride solution.
3 2 3 4 9
4 If the rate of reaction is independent of the concentration of the reactant, the reaction is of Zero order First order Second order Third order
5 The addition of a catalyst to a reaction changes the Enthalpy Entropy Nature of reactants Energy of activation
6 Which of the following factors does not influenced the rate of reaction Concentration of the reaction Nature of the reactants Molecularity of the reaction Temperature
7 The experimental relationship between a reaction rate and the concentration of reactants is known as Order Molecularity Rate constant Rate law
8 The number of atoms or molecules whose concentrations determine the rate of the reaction is called Molecularity Order Rate of reaction Rate constant
9 ______ are called biocatalysts Organic acids Organic bases Enzymes All
10 Complex protein molecules which catalyses the organic reactions in the living cells are called Living organisms Enzymes Viruses Bacteria
11 Diastase Lipase Inverters Zymase
12 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 Cu(NO<sub>3</sub>)<sub>2</sub> CuO O<sub>2</sub> HNO<sub>2</sub>
13 In the reaction of oxalic acid with KMnO4and H2SO4is slow at the beginning but after sometimes the reaction becomes faster due to Formation of MnSO<sub>4</sub>which acts as 'Auto catalyst Formation of CO<sub>2</sub>which acts as 'Auto catalyst Formation of K<sub>2</sub>SO<sub>4</sub>which acts as 'Auto catalyst Evolution of O<sub>2</sub>gas which acts as 'Auto catalyst
14 Hydrogenation of vegetable oils is accelerated by Ni catalyst. The catalytic activity of Bi is increased by a promoter of activator which is Na and K Na and Hg Hg and Zn Cu and Te
15 In the manufacture of NH3by Haber's process catalyst used is iron its catalytic efficiency is poisoned by Presence of Al<sub>2</sub>O<sub>3</sub> Presence of Cr<sub>2</sub>O<sub>3</sub> MnO<sub>2</sub> CO present with H<sub>2</sub>gas
16 The catalytic activity of Pt is much higher when It is mixed with asbestos It is mixed with Pd It is mixed with arsenic In is made colloidal platinum
17 The effective activity of a metal catalyst is increased if it is in Solid form Liquid state Gaseous state Finely divided form
18 Homogeneous Heterogeneous Isogeneous None
19 Platinum is poisoned by Arsenic Silver Argon Zinc
20 which one of the following is a heteroheneous catalysis
21 Homogenous catalysis is that in which catalyst and reactants are in same phase. Which one of the following reaction is a homogenous catalysis
22 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 It increases the temperature It increase the surface area It increases the rate constant It decrease the energy energy of activation
23 The value of activation energy Ea of a reaction can be determined from the value of slope of the straight line obtained by plotting a graph between 1/T and log k. the value of Ea is equal to Slope 1/Slope Slope x R Slope x 2.303 R
24 Which statement about Arrhenius equation is incorrect Factor 'A' called Arrhenius constant depends upon collision frequency of reactants Rate of reaction increase by increasing temperature Rate constant k is increased Activation energy Ea is decreased by rise in temperature
25 The rate constant k of a reaction activation energy Ea and temperature are related by Arrhenius in the form of an equation which is
26 With increases in temperature of 10 K of the reacting gases the rate of reaction is doubled because Increase in number of collisions Number of molecules having energy more than Ea is doubled Increase in order of reaction Increase in surface area
27 The factor which effect the rate of reaction Nature of reactants Surface area Light All of the above
28 Which of the following is not affected by light
29 Which one of the following reaction rate is effected by the light
30 The actual number of atoms or molecules taking part in rate determining step is Rate of reaction Velocity of reaction Order of reaction Molecularly
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