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Which one of the following has the smallest heat of hydrogenation per mole?

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Important Questions on Organic Chemistry- Some Basic Principles and Techniques

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The compound that does NOT liberate CO2, on treatment with aqueous sodium bicarbonate solution, is 
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Given,

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The enthalpy of hydrogenation of these compounds will be in the order as:
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In case of substituted aniline the group which decreases the basic strength is
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Considering the basic strength of amines in an aqueous solution, which one has the smallest pKb value?
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The correct order for acid strength of compounds CHCH,CH3-CCH and CH2=CH2 is as follows:
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Among the following oxoacids, the correct decreasing order of acid strength is :
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The increasing order of the pKb  of the following compund is:
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Which one of the following esters gets hydrolyzed most easily under alkaline conditions?
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The correct increasing order of the basic strength for the following compounds is:

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An organic compound X showing the following solubility profile is:
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The correct order of the basis strength of methyl substituted amines in aqueous solution is:
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Consider the following four compounds I, II, III, and IV.

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Choose the correct statement(s).