B.Sc-B.Sc Chemistry (Hons) 0 Inorganic Chemistry(Aligarh Muslim University (AMU), Aligarh, Uttar Pradesh-2009)
2008
B.Sc. (HONS.) (PART-1) EXAM IN A MON (CHEMISTRY)
INORGANIC CHEMISTRY (CH-111)
Answer all questions.
Calculate the wave lengths of an electron moving with a velocity lo'/per see and <>! a 100 kg drum rolling at a speed of 30km per hour, mass of an electron ~ 9.1 x I O 1 kg.
Stale Hunds rule of Maximum Multiplicity.
Write the electronic configuration of elements having atomic numbers 24. 26. 4 7, 92.
L)raw the various shapes of p and d orbitals.
Answer any THREE of the following : < 2 2 * 2 ;
Arrange the following according to the instructions given against each.
{;) F. N. O, S (Increasing order of electro-negativ i t\
(tii i e. IV", Fe2 (Increasing size;
(iii) C\ F, Li Cs (Increasing order oflEj)
< iv) Ct. Br. 1 (Increasing order of electron affir.ii} )
(i) Electron affinity of noble gases is zero and that of nitrogen is vcr> low
(ii) The radius of an anion is greater than the radius of an atom
Define electro-negativity. Discuss the trend in ekc;r-iicga;:vity \ ariiujs f>eri<i,i'
Explain why the second ionization energy o I sodium is ver> high compuicv! ;> ionization enerev
Answer any POUR of the following :
What designations are given to orbitals having -(ij n = 3. I = 1 < ii I n -- 2 . I ~ 0
(iii) n = 4 .1 = 0
(iv) An electron is in 4f orbital
(iivt* the possible values for its quantum numbers.
in building up of the atoms the filling of 4s orbitals takes place before tli
(b) Why the bond angles of NH3 and H20 molecules arc different than the normal bond angles of Sp hybridization ?ic i W IkiI is radius ratio rule ? Show how it helps in assigning geoineiry or mmc soiio>
(d) F.xplain the consequences of hydrogen bonding. Why do I NO an III- have abnormally high boiling points.
Answer any THRCE of the following : * --
(a) Draw rhe structures of hypophosphoruus and. urthophosphorie acid andjpyrophosphorie acid. Why II3PO3 is diprotic acid ?
(Ii> On rhe basis of hybridization, discuss the geometry of \'ll-und II-;.
(c) What is diagonal relationship ? In whai respect does Beryllium resemble Aluminium ?
(d) Win is said to be a electron deficient compound ? P>:phi: thre
Diborane
(e) What i_s inen pair effect ? Why heavier p-block element' or .. more stable compounds in lower oxidation states ?
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