Label
the hydrophilic and hydrophobic part in the following molecule of a non-ionic
detergent:
Identify
the functional groups present in the molecule. 2
(a)
Why are haloarenes less reactive than haloalkanes towards nucleophilic
substitution reaction?
1
(b)
Why is used
during the reaction of alcohols with in the
conversion of an alcohol to the alkyl
bromide? 1
Chromium
metal crystallizes in body centered cubic lattice. The length of the unit cell
edge is found to be 28 pm. Calculate the atomic radius of
chromium. 2
Describe
the following about halogens :
(a)
Relative oxidizing power of
halogens. 1
(b)
Relative acidic strength of hydrogen
halides. 1
(c)
Formation of oxoacids of halogens and the structure of oxoacids of chlorine
only. 1
Compare
the chemistry of actinoids with that of lanthanoids with reference to :
(a)
Electronic
configuration 1
(b)
Oxidation
states 1
(c)
Chemical
reactivity. 1
(a)
Write the structure of N, N-ethyl methyl
amine. 1
(b)
Write the chemical reaction each to illustrate the following:
(i)
Acetylation
reaction 1
(ii)
Carbyl amine reaction.
' 1
(i)
Di-tertbutyl ether cannot be made by Williamson's Synthesis. Explain why? 2
(ii)
Why the dipole moments of phenols smaller than alcohols. (Value Based)
1
An
organic compound (A) on treatment with ethyl alcohol gives a carboxylic acid
(B) and compound
(C).
Hydrolysis of (C) under acidified condition gives (B) and (D). Oxidation of (D)
with also
gives (B), (B) on heating with gives
(E) having molecular formulas. (E)
does not give Tollen's test and does not reduce Fehling's solution. Identify
(A), (B), (C), (D) and (E). 5
(a)
How does acidifies solution
reacts with : 2
(i) Iron () ions
(ii) Oxalic
acid.
(b) Name
the oxometal amine of one of the transition metals in which the metal exhibits the
oxidation state equal to the group number. 1
(c)
Write the electronic configuration of ion and
calculate the magnetic moment on the basis of spin only formula. (Atomic no. of
=
58) 2
On
dissolving 3.24 gm. of sulphur in 40 gm of benzene boiling point of solution
was higher than that of benzene by 0.81 K. value
for benzene is 2.53 K kg . What
is the molecular formula of Sulphur? (Atomic mass of sulphur = 32 g )
5