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The slope in the plot of [R] Vs. time for a zero-order reaction is ______.
Concept: Zero Order Reactions
The slope in the plot of `log ["R"]_0/(["R"])` Vs. time for a first-order reaction is ______.
Concept: First Order Reactions
For the reaction \[\ce{3A -> 2B}\], rate of reaction `-("d"["A"])/"dt"` is equal to ______.
Concept: Effect of Catalyst on the Rate of Reaction
Assertion (A): For a zero-order reaction, the unit of rate constant and rate of reaction are same.
Reason (R): Rate of reaction for zero order reaction is independent of concentration of reactant.
Concept: Zero Order Reactions
Assertion (A): The half-life of a reaction is the time in which the concentration of the reactant is reduced to one-half of its initial concentration.
Reason (R): In first-order kinetics, when the concentration of reactant is doubled, its half-life is doubled.
Concept: Half Life Period of a Reaction
Assertion (A): Order of reaction is applicable to elementary as well as complex reactions.
Reason (R): For a complex reaction, molecularity has no meaning.
Concept: Factors Influencing Rate of a Reaction
Which of the following statement is true?
Concept: Factors Influencing Rate of a Reaction
If the initial concentration of substance A is 1.5 M and after 120 seconds the concentration of substance A is 0.75 M, the rate constant for the reaction if it follows zero-order kinetics is ______.
Concept: Zero Order Reactions
Radioactive decay follows first-order kinetics. The initial amount of two radioactive elements X and Y is 1 gm each. What will be the ratio of X and Y after two days if their half-lives are 12 hours and 16 hours respectively?
Concept: First Order Reactions
A reaction is second order with respect to a reactant. How is the rate of reaction affected if the concentration of the reactant is reduced to half?
Concept: Factors Influencing Rate of a Reaction
Which metal in the first transition series (3d series) exhibits + 1 oxidation state most frequently and why?
Concept: Physical Properties of the Transition Elements (d-block)
Which of the following cations are coloured in aqueous solutions and why ?
Sc3+, V3+, Ti4+, Mn2+ (At. Nos. Sc = 21, V = 23, Ti = 22, Mn = 25)
Concept: Physical Properties of the Transition Elements (d-block)
How would you account for the following?
Transition metals exhibit variable oxidation states.
Concept: Physical Properties of the Transition Elements (d-block)
Complete the following chemical equations:
`(i) Cr_2O_7^(2-)+6Fe^(2+)+14H^+ ->`
`(ii) 2CrO_4^(2-)+2H^+ ->`
`(iii) 2MnO_4^-+5C_2O_4^(2-)+16H^+ ->`
Concept: Physical Properties of the Transition Elements (d-block)
Complete the following equations:
Concept: Important Compounds of Transition Elements
Complete the following equations: Cr2O72- + 14H+ + 6I →
Concept: Important Compounds of Transition Elements
The elements of 3d transition series are given as: Sc Ti V Cr Mn Fe Co
Answer the following: Write the element which shows maximum number of oxidation states. Give reason.
Concept: Physical Properties of the Transition Elements (d-block)
The elements of 3d transition series are given as: Sc Ti V Cr Mn Fe Co
Answer the following: Which element has the highest m.p?
Concept: Physical Properties of the Transition Elements (d-block)
The elements of 3d transition series are given as: Sc Ti V Cr Mn Fe Co
Answer the following: Which element shows only +3 oxidation state?
Concept: Physical Properties of the Transition Elements (d-block)
The elements of 3d transition series are given as: Sc Ti V Cr Mn Fe Co
Answer the following: Which element is a strong oxidising agent in +3 oxidation state and why?
Concept: Physical Properties of the Transition Elements (d-block)
