Please select a subject first
Advertisements
Advertisements
What is the action of carbon on the following metal oxides:
Fe2O3 in the blast furnace
Concept: Oxidation Reduction
What is the action of carbon on the following metal oxides :
ZnO in the vertical retort furnace
Concept: Oxidation Reduction
In Van Arkel method for refining zirconium or titanium, the halogen used is __________.
Concept: General Principles and Processes of Isolation of Elements >> Principles and Methods of Extraction - Concentration
The half life period of a first order reaction is 6. 0 h . Calculate the rate constant
Concept: Half Life Period of a Reaction
What is the role of the following compound-
SiO2 in the extraction of copper from copper pyrites?
Concept: Occurrence of Metals
In a first-order reaction A → product, 80% of the given sample of compound decomposes in 40 min. What is the half-life period of the reaction?
Concept: Half Life Period of a Reaction
Answer the following in one or two sentences.
What is the relationship between coefficients of reactants in a balanced equation for an overall reaction and exponents in the rate law? In what case the coefficients are the exponents?
Concept: Molecularity of Elementary Reactions
Answer the following in one or two sentences.
Why all collisions between reactant molecules do not lead to a chemical reaction?
Concept: Collision Theory of Bimolecular Reactions
Answer the following in brief.
How instantaneous rate of reaction is determined?
Concept: Rate of Reactions
A reaction takes place in two steps:
- \[\ce{NO_{(g)} + Cl2_{(g)} -> NOCl2_{(g)}}\]
- \[\ce{NOCl2_{(g)} + NO_{(g)} -> 2NOCl_{(g)}}\]
- Write the overall reaction.
- Identify the reaction intermediate.
- What is the molecularity of each step?
Concept: Molecularity of Elementary Reactions
Answer the following in brief.
Obtain the relationship between the rate constant and half-life of a first-order reaction.
Concept: Integrated Rate Equations
What are pseudo-first-order reactions?
Concept: Integrated Rate Equations
Answer the following in brief.
Explain graphically the effect of temperature on the rate of reaction.
Concept: Temperature Dependence of Reaction Rates
Solve
The half-life of a first-order reaction is 1.7 hours. How long will it take for 20% of the reactant to react?
Concept: Integrated Rate Equations
Show that the time required for 99.9% completion of a first-order reaction is three times the time required for 90% completion.
Concept: First Order Reactions
How will you determine activation energy from rate constants at two different temperatures?
Concept: Temperature Dependence of Reaction Rates
Answer the following in brief.
Give one example and explain why it is pseudo-first-order.
Concept: Integrated Rate Equations
The rate law relates to the rate of a chemical reaction in terms of _______.
Concept: Rate of Reaction and Reactant Concentration
For first order reaction, the rate constant for the decomposition of N2O5 is 6 × 10–4 s –1. The half-life period for decomposition in seconds is ______.
Concept: Integrated Rate Equations
Effect of catalyst in a chemical reaction is to change the _______.
Concept: Collision Theory of Bimolecular Reactions
