(a) Calculate the boiling point of urea solution when 8·0g of urea is dissolved
in 250g of water. Boiling point of pure water is 373K.
(kb of water = 0·52 K kg mol-1, molecular mass of urea = 60 g mol-1)
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(b) Ethylene glycol is used as an antifreeze agent. Calculate the amount of
ethylene glycol to be added to four kilogram of water to prevent it from
freezing at -6oC.
(Kf of water = 1·86 K kg mol-1) Assume that ethylene glycol
(CH2OH.CH2OH) does not dissociate or associate in aqueous solution.
(c) What will be the effect on the value of molality and molarity of a solution
with change in temperature?
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CHEMISTRY

(A) Fill in the blanks by choosing the appropriate word(s) from those given in the [4×1] brackets: [four, three, remains same, propane, ns1-2, increases, six, propan-2-ol, (n-1)d1-10, two, decreases, Clemmensen’s, Wolff-Kishner]
The molar conductance of a solution _________ on dilution but the
specific conductance of a solution _________ on dilution.

3] Identify the compounds [A], [B] and [C] in the following reactions. 6[H] HNO2 + HCl C6H5NH2
CH3CH2NH2 [A] [B] [C]
(2) P/Cl2 (2) H2O/H+ (2) Br2/KOH

What are reducing sugars? Give an example.
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3] Identify the compounds [A], [B] and [C] in the following reactions. 6[H] HNO2 + HCl C6H5NH2
C6H5NO2 [A] [B] [C]
Sn/HCl 273K-278K
(1) HNO2 (1) KCN (1) NH3/heat

(A) Fill in the blanks by choosing the appropriate word(s) from those given in the [4×1] brackets: [four, three, remains same, propane, ns1-2, increases, six, propan-2-ol, (n-1)d1-10, two, decreases, Clemmensen’s, Wolff-Kishner]
In the complex ion [CoCl(en)2ONO]+, the coordination number and
the oxidation number of the central metal ion are ______ and
________.

(A) Fill in the blanks by choosing the appropriate word(s) from those given in the [4×1] brackets: [four, three, remains same, propane, ns1-2, increases, six, propan-2-ol, (n-1)d1-10, two, decreases, Clemmensen’s, Wolff-Kishner]
Propanone on reaction with zinc amalgam in the presence of
concentrated HCl gives ______ and the reaction is called _______
reduction.