CHEMICAL KINETICS QUIZ-24
Dear Readers,
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 order of the reaction CH_3 COOC_2 H_5+H_2 O⇌CH_3 COOH+C_2 H_5 OH is 2
Statement 2: The molecularity of this reaction is 2
excess
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: Positive catalyst lowers the activation energy of the reaction whereas the heat of reaction remains same
Statement 2: The heat of reaction is equal to the difference between activation energies for forward and backward reactions
:
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: In the reaction I_2+2S_2 O_3^(2-)→S_4 O_6^(2-)+2I^-, the two S_2 O_3^(2-) ions are used for every I_2.
Statement 2: The rate of disappearance of I_2 is one half the rate of disappearance of S_2 O_3^(2-)
Solution
(c) Explanation is correct reason for statement.
(c) Explanation is correct reason for statement.
Q4. Statement 1: If the activation energy of a reaction is zero, temperature will have no effect on the rate constant Statement 2: Lower the activation energy, faster is the reaction
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: For a first order reaction the plots of rate vs. concentration is straight line
Statement 2: For a first order reaction, Rate=k[A]
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: Positive catalysts increase the rate of reaction
Statement 2: Catalyst decrease the value of ∆G^⊖
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: An order with respect to any reactant or product can be zero, positive, negative, and fractional
Statement 2: Rate cannot decrease with increase in the concentration of a reactant or product
Solution
Q8.Statement 1: For: aA+bB→Product. The order of reaction is equal to (a+b)
Statement 2: Rate of reaction =k[A]^a [B]^b
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: The emission of light during burning of P in O_2 is called chemiluminescence.
Statement 2: The chemical energy is converted into light energy.
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: The rate of a chemical reaction whether exothermic or endothermic increases with temperature
Statement 2: The rate of reaction=k[Reactant]^n and k increases with temperature
Solution
(b) All factual statements
(b) All factual statements
Written by: AUTHORNAME
SHARE:
