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Karnataka Board PUCPUC Science 2nd PUC Class 12

PUC Science 2nd PUC Class 12 - Karnataka Board PUC Question Bank Solutions for Chemistry

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Chemistry
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From the rate expression for the following reaction, determine the order of reaction and the dimension of the rate constant.

\[\ce{C2H5Cl_{(g)} -> C2H4_{(g)} + HCl_{(g)}}\] Rate = k [C2H5Cl]

[0.03] Chemical Kinetics
Chapter: [0.03] Chemical Kinetics
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For the reaction: \[\ce{2A + B → A2B}\]  the rate = k[A][B]2 with k = 2.0 × 10−6 mol−2 L2 s−1. Calculate the initial rate of the reaction when [A] = 0.1 mol L−1, [B] = 0.2 mol L−1. Calculate the rate of reaction after [A] is reduced to 0.06 mol L−1.

[0.03] Chemical Kinetics
Chapter: [0.03] Chemical Kinetics
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Mention the factors that affect the rate of a chemical reaction.

[0.03] Chemical Kinetics
Chapter: [0.03] Chemical Kinetics
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A reaction is second order with respect to a reactant. How is the rate of reaction affected if the concentration of the reactant is doubled?

[0.03] Chemical Kinetics
Chapter: [0.03] Chemical Kinetics
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A reaction is first order in A and second order in B. Write the differential rate equation.

[0.03] Chemical Kinetics
Chapter: [0.03] Chemical Kinetics
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A reaction is first order in A and second order in B. How is the rate affected on increasing the concentration of B three times?

 

[0.03] Chemical Kinetics
Chapter: [0.03] Chemical Kinetics
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A reaction is first order in A and second order in B. How is the rate affected when the concentrations of both A and B are doubled?

[0.03] Chemical Kinetics
Chapter: [0.03] Chemical Kinetics
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In a reaction between A and B, the initial rate of reaction (r0) was measured for different initial concentrations of A and B as given below:

A/mol L−1 0.20 0.20 0.40
B/mol L−1 0.30 0.10 0.05
r0/mol L−1 s−1 5.07 × 10−5 5.07 × 10−5 1.43 × 10−4

What is the order of the reaction with respect to A and B?

[0.03] Chemical Kinetics
Chapter: [0.03] Chemical Kinetics
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Which of the ores mentioned can be concentrated by magnetic separation method?

[0.06] General Principles and Processes of Isolation of Elements
Chapter: [0.06] General Principles and Processes of Isolation of Elements
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Differentiate between “minerals” and “ores”.

[0.06] General Principles and Processes of Isolation of Elements
Chapter: [0.06] General Principles and Processes of Isolation of Elements
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Write the formula for the given coordination compound:

Iron (III) hexacyanoferrate (II)

[0.05] Coordination Compounds
Chapter: [0.05] Coordination Compounds
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Sleeping pills are recommended by doctors to the patients suffering from sleeplessness but it is not advisable to take its doses without consultation with the doctor, Why?

[0.16] Chemistry in Everyday Life
Chapter: [0.16] Chemistry in Everyday Life
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With reference to which classification has the statement, ‘ranitidine is an antacid” been given?

[0.16] Chemistry in Everyday Life
Chapter: [0.16] Chemistry in Everyday Life
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Why do we need to classify drugs in different ways?

[0.16] Chemistry in Everyday Life
Chapter: [0.16] Chemistry in Everyday Life
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Explain the term target molecules or drug targets as used in medicinal chemistry.

[0.16] Chemistry in Everyday Life
Chapter: [0.16] Chemistry in Everyday Life
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Why should not medicines be taken without consulting doctors?

[0.16] Chemistry in Everyday Life
Chapter: [0.16] Chemistry in Everyday Life
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Define the term chemotherapy.

[0.16] Chemistry in Everyday Life
Chapter: [0.16] Chemistry in Everyday Life
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Classify the following as primary, secondary and tertiary alcohol:

\[\begin{array}{cc}
\ce{CH3}\phantom{.}\\
|\phantom{....}\\
\ce{CH3 - C - CH2OH}\\
|\phantom{....}\\
\ce{CH3}\phantom{.}
\end{array}\]

[0.07] Alcohols, Phenols and Ethers
Chapter: [0.07] Alcohols, Phenols and Ethers
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Identify allylic alcohols in the following examples.

[0.07] Alcohols, Phenols and Ethers
Chapter: [0.07] Alcohols, Phenols and Ethers
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Give the structures and IUPAC names of monohydric phenols of molecular formula C7H8O.

[0.07] Alcohols, Phenols and Ethers
Chapter: [0.07] Alcohols, Phenols and Ethers
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