Q.3 In some reactions, a product formed acts as a catalyst. The phenomenon is called
A) Negative Catalysis C) Hetergeneous catalysis
B) Activation of Catalyst D) Autocatalysis
Q.4 The reaction rate in forward direction decreases with the passage of time because
A) Concentration of reactants decrease C) The order of reaction changes
B) Concentration of product decreases D) Temperature of the system changes
A) Negative Catalysis C) Hetergeneous catalysis
B) Activation of Catalyst D) Autocatalysis
Q.4 The reaction rate in forward direction decreases with the passage of time because
A) Concentration of reactants decrease C) The order of reaction changes
B) Concentration of product decreases D) Temperature of the system changes
Q.6 In zero order reactions, the rate is independent of:
A) Concentration of the product C) Temperature of the reaction
B) Concentration of the reactant D) Surface area of the product
A) Concentration of the product C) Temperature of the reaction
B) Concentration of the reactant D) Surface area of the product
Q.7 If the reactant or product of a chemical reaction can absorb ultraviolet, visible or infrared radiation, then the rate of a chemical reaction can best be measured by which one of the following methods?
A) Chemical method C) Graphical method
B) Spectrometry D) Differential method
Q.8 For the reaction 2NO + O2 ⇌ 2NO2, the rate equation for the forward reaction is
A) Rate = k [NO] [O2] C) Rate = k [NO2]2
B) Rate = k [NO]2[O2] D) Rate = k [NO2]
A) Chemical method C) Graphical method
B) Spectrometry D) Differential method
Q.8 For the reaction 2NO + O2 ⇌ 2NO2, the rate equation for the forward reaction is
A) Rate = k [NO] [O2] C) Rate = k [NO2]2
B) Rate = k [NO]2[O2] D) Rate = k [NO2]
Q.9 The half-life of N2O5 at 0 oC is 24 minutes. How long will it take for sample of N2O5 to decay to
25% of its original concentration?
A) 24 minutes C) 120 minutes
B) 72 minutes D) 48 minutes
25% of its original concentration?
A) 24 minutes C) 120 minutes
B) 72 minutes D) 48 minutes
Q.10 When the change in concentration is 6 x 10-4 mol dm-3 and time for that change is 10 seconds,
the rate of reaction will be
A) 6 × 10-3 mol dm-3 sec-1 C) 6 × 10-2 mol dm-3 sec-1
B) 6 × 10-4 mol dm-3 se -1 D) 6 × 10-5 mol dm-3 sec-1
the rate of reaction will be
A) 6 × 10-3 mol dm-3 sec-1 C) 6 × 10-2 mol dm-3 sec-1
B) 6 × 10-4 mol dm-3 se -1 D) 6 × 10-5 mol dm-3 sec-1
Q.12 The rate constant ‘k’ is 0.693 min-1. The half-life for the 1st order reaction will be:
A) 1 min C) 0.693 min
B) 2 min D) 4 min
A) 1 min C) 0.693 min
B) 2 min D) 4 min