First Order Reactions

JEE Main Chemistry · Chemical Kinetics · 32 questions, latest first

• First order gas phase reaction A → B+C p_i= initial pressure of gas A, p_t= total pressure of the reaction mixture at time t…20265 April, Shift 1 · Q57
• If the half life of a first order reaction is 6.93 minutes then the time required for completion of 99 % of the reaction will be…20265 April, Shift 1 · Q75
• For a first order reaction A → B x= ____ min. (Nearest integer)20264 April, Shift 2 · Q74
• Consider the first order reaction R → P. The fraction of molecules decomposed in the given first order reaction can be expressed…20264 April, Shift 1 · Q57
• Consider the following gas phase reaction being carried out in a closed vessel at 25^° C. 2 A( g) → 4 B( g)+C( g) The pressure of…20262 April, Shift 2 · Q72
• An organic compound undergoes first order decomposition. The time taken for decomposition to (1/8)^th and (1/10)^th of its…202628 January, Shift 1 · Q57
• The half-life of ^65 Zn is 245 days. After x days, 75 % of original activity remained. The value of x in days is ____. (Nearest…202624 January, Shift 2 · Q75
• Decomposition of A is a first order reaction at T(K) and is given by A(g) → B(g)+C(g). In a closed 1 L vessel, 1 bar A(g) is…202621 January, Shift 2 · Q56
• In a first order decomposition reaction, the time taken for the decomposition of reactant to one fourth and one eighth of its…20258 April, Shift 2 · Q54
• A(g) → B(g)+C(g) is a first order reaction. The reaction was started with reactant A only. Which of the following expression is…20257 April, Shift 2 · Q57
• Reaction A(g) → 2 B( g)+C(g) is a first order reaction. It was started with pure A Which of the following option is incorrect?20257 April, Shift 1 · Q56
• For the reaction A → B the following graph was obtained. The time required (in seconds) for the concentration of A to reduce to…20252 April, Shift 2 · Q71
• For the reaction A → products. The concentration of A at 10 minutes is ____ × 10^-3 mol L^-1 (nearest integer). The reaction was…20252 April, Shift 1 · Q72
• For bacterial growth in a cell culture, growth law is very similar to the law of radioactive decay. Which of the following graphs…202528 January, Shift 2 · Q56
• Given below are two statements: Statement (I): is valid for first order reaction. Statement (II): is valid for first order…202524 January, Shift 2 · Q57
• For a reaction, N_2 O_5( g) → 2 NO_2( g)+1/2 O_2( g) in a constant volume container, no products were present initially. The…202524 January, Shift 1 · Q57
• For the thermal decomposition of N_2 O_5( g) at constant volume, the following table can be formed, for the reaction mentioned…202523 January, Shift 1 · Q73
• Which of the following statement is not true for radioactive decay?202522 January, Shift 1 · Q57
• Consider the following first order gas phase reaction at constant temperature A( g) → 2 B( g)+C( g) If the total pressure of the…20249 April, Shift 2 · Q85
• Consider the two different first order reactions given below A+B → C (Reaction 1); P → Q (Reaction 2) The ratio of the half life…20246 April, Shift 2 · Q85
• Time required for 99.9 % completion of a first order reaction is ____ times the time required for completion of 90 %…20246 April, Shift 1 · Q85
• Consider the following reaction, the rate expression of which is given below A+B → C rate =k[ A]^1 / 2[ B]^1 / 2 The reaction is…20244 April, Shift 2 · Q85
• The following data were obtained during the first order thermal decomposition of a gas A at constant volume: A( g) → 2 B( g)+C(…20241 February, Shift 2 · Q86
• r=k[A] for a reaction, 50 % of A is decomposed in 120 minutes. The time taken for 90 % decomposition of A is ____ minutes.202431 January, Shift 2 · Q85
• Integrated rate law equation for a first order gas phase reaction is given by (where P_i is initial pressure and P_t is total…202431 January, Shift 1 · Q65
• The rate of First order reaction is 0.04 mol L^-1 s^-1 at 10 minutes and 0.03 mol L^-1 s^-1 at 20 minutes after initiation. Half…202430 January, Shift 1 · Q87
• A(g) → 2 B( g)+C(g) is a first order reaction. The initial pressure of the system was found to be 800 mm Hg which increased to…202313 April, Shift 2 · Q87
• A(g) ⇌ 2 B(g)+C(g) For the given reaction, if the initial pressure is 450 mm Hg and the pressure at time t is 720 mm Hg at a…202310 April, Shift 2 · Q85
• The rate constant for a first order reaction is 20 min^-1. The time required for the initial concentration of the reactant to…202331 January, Shift 2 · Q57
• An organic compound undergoes first order decomposition. If the time taken for the 60\% decomposition is 540 s, then the time…202330 January, Shift 2 · Q56
• If compound A reacts with B following first order kinetics with rate constant 2.011 × 10^-3 s^-1. The time taken by A (in…202330 January, Shift 1 · Q58
• A first order reaction has the rate constant, k=4.6 × 10^-3 s^-1. The number of correct statement/s from the following is/are…202325 January, Shift 2 · Q56