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Two elements A and B form compounds having formula AB2 and AB4. When dissolved in 20 g of benzene (C6H6), 1 g of AB2 lowers the freezing point by 2.3 K whereas 1.0 g of AB4 lowers it by 1.3 K. The molar depression constant for benzene is 5.1 K kg mol−1. Calculate the atomic masses of A and B.
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The depression in freezing point of water observed for the same amount of acetic acid, trichloroacetic acid and trifluoroacetic acid increases in the order given above. Explain briefly.
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Calculate the depression in the freezing point of water when 10 g of CH3CH2CHClCOOH is added to 250 g of water. Ka = 1.4 × 10−3, Kf = 1.86 K kg mol−1.
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Suggest two materials other than hydrogen that can be used as fuels in fuel cells.
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How are the colloidal solutions classified on the basis of physical states of the dispersed phase and dispersion medium?
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Why are hydrophobic sols easily coagulated?
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How are colloids classified on the basis of Physical states of components
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How are colloids classified on the basis of the nature of the dispersion medium?
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How are colloids classified on the basis of interaction between the dispersed phase and the dispersion medium?
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Discuss the nature of bonding in metal carbonyls.
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Where does the water present in the egg go after boiling the egg?
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What is the effect of denaturation on the structure of proteins?
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Account for the following:
Diazonium salts of aromatic amines are more stable than those of aliphatic amines.
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Predict the product of the following reaction:
\[\ce{CH3 - CH2 - CH2 - O - CH3 + HBr ->}\]
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Predict the product of the following reaction:
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Predict the product of the following reaction:
\[\ce{(CH3)3C - OC2H5 ->[HI]}\]
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Show how will you synthesize cyclohexylmethanol using an alkyl halide by an SN2 reaction.
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Write the equation of the reaction of hydrogen iodide with 1-propoxypropane.
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Write the equation of the reaction of hydrogen iodide with methoxybenzene.
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Write the equation of the reaction of hydrogen iodide with benzyl ethyl ether.
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