CHEMICAL KINETICS QUIZ-22
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IIT JEE exam which consists of JEE Main and JEE Advanced is one of the most important entrance exams for engineering aspirants. The exam is held for candidates who are aspiring to pursue a career in the field of engineering and technical studies.
Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything..
Q1.Statement 1: The rate constant of a zero order reaction has same units as the rate of reaction
Statement 2: Rate constant of a zero order reaction does not depend upon the units of concentration
Solution
(d) Both statement and explanation are correct but the reason is different
(d) Both statement and explanation are correct but the reason is different
Q2.Statement 1: The order of reaction can have fractional value.
Statement 2: The order of reaction can not be written from balanced equation of a reaction.
:
Solution
(a) Nacl has fcc structure in which each Na^+ is surrounded by six ions and vic versa.In this octahedral arrangement, coordination, number of bothNa^+ and Cl^- is six for which radius ratio lies between 0.414 and 0.732. The radius ratio does not allow Cl^- ions to touch each other.
(a) Nacl has fcc structure in which each Na^+ is surrounded by six ions and vic versa.In this octahedral arrangement, coordination, number of bothNa^+ and Cl^- is six for which radius ratio lies between 0.414 and 0.732. The radius ratio does not allow Cl^- ions to touch each other.
Q3. Statement 1: The molecularity of the reaction
H_2 Br_2→2HBr is 2
Statement 2: The order of the reaction is 3/2
Solution
(c) Explanation is correct reason for statement.
(c) Explanation is correct reason for statement.
Q4. Statement 1: For a first order, the concentration of a reactant decreases exponentially with time Statement 2: The rate of reaction at any time depends upon the concentration of the reactant at that time
Solution
(a) Packing fraction in fcc = 74% Packing fraction in bcc = 67.9%
(a) Packing fraction in fcc = 74% Packing fraction in bcc = 67.9%
Q5.Statement 1: A catalyst does not affect the heat of reaction.
Statement 2: It increases the rate of reaction.
Solution
(d) Both statement and explanation are correct but reason for the statement is different
(d) Both statement and explanation are correct but reason for the statement is different
Q6Statement 1: The order of a reaction can be fractional but molecularity is never fractional
Statement 2: The order of reaction does not depend upon the stoichiometric coefficient of a balanced equation
Solution
(a) For fcc, Number of O^(2-) ions =8(corners)×1/8per corner share +6 (faces)×1/2per face share=4 Number of Si^(4+) ions =1/4×OV=1/4×4=1/unit cell Number Fe^(2+) ions =1/4×TV=1/4×8=2/unit cell ⇒Fe_2 SiO_4
(a) For fcc, Number of O^(2-) ions =8(corners)×1/8per corner share +6 (faces)×1/2per face share=4 Number of Si^(4+) ions =1/4×OV=1/4×4=1/unit cell Number Fe^(2+) ions =1/4×TV=1/4×8=2/unit cell ⇒Fe_2 SiO_4
Q7. Statement 1: Both H_2 (g)+Cl_2 (g)→2HCl(g) and H_2 (g)+Br_2 (g)→2HBr(g) have the same order of reaction
Statement 2: Both reactions proceed by the same mechanism
Solution
Q8. Statement 1: In the reaction, N_2+3H_2→2NH_3, the rate of reaction is different in terms of N_2, H_2 and NH_3
Statement 2: The rate of reaction is equal to the rate of disappearance of a reactant or rate of formation of a product
Solution
(c) The distance 0.204 nm comes out to be " a⁄√3 " which corresponds to the perpendicular distance between a corner of unit cell and the plane of the three adjacent corners (Fig. III)
(c) The distance 0.204 nm comes out to be " a⁄√3 " which corresponds to the perpendicular distance between a corner of unit cell and the plane of the three adjacent corners (Fig. III)
Q9. Statement 1: Lower activation energy fasten is the reaction
Statement 2: If the activation energy of reaction is zero, temperature will have no effect on the rate constant
Solution
(a) AB_2 has bcc structure, A^(2+) possess face centred cubic lattice. B^- ions occupy all the (100%) tetrahedral voids. Thus each A^(2+) is in contact with B^- and each B^- with 4A^(2+) ions.
(a) AB_2 has bcc structure, A^(2+) possess face centred cubic lattice. B^- ions occupy all the (100%) tetrahedral voids. Thus each A^(2+) is in contact with B^- and each B^- with 4A^(2+) ions.
Q10.Statement 1: For each 1℃ rise in temperature rate constant is nearly doubled.
Statement 2: Energy wise distribution of molecule in a gas is an exponential function of temperature.
Solution
(b) All factual statements
(b) All factual statements
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