NOW CHEMISTRY
***Thermo Questions involving H=U+PV
***1 Organic question involving Kjeldahl's method.
***Reducing sugars and non-reducing sugars can be distinguished - NaHCO3, Biuret test, Ninhydrin Test, Fehling's solution
***Fullerene structure was known by : three dirty options and mass spectrometry(i marked mass spectrometry so remember it)
***If E is the energy of the ground state level of an electron in an one-dimensional box of length L. Then what is the energy of the 2nd excited state - a) 9E, b) 4E/L, c) 2E, d) 3E
***Then a few involving atomic radius (n2/Z), velocity (Z/n), etc typed questions
***At what temperature will the rms velocity of SO2( at NTP) be equal to that of Cl2. (no need for options. solve it yourself)
***At what temperature will the average velocity of H2 (at 20K) be equal to that of O2
***Then there was 1 question from organic
C2H6---(A)--->C2H4
Ethylene reacts with H2O, acid catalysed KCN and H2SO4 to give B,C,D. Identify B,C,D. Options were given but dont remember it. And here A is temperature not any reagent
***Which involves the highest temperature?
a)Self -reduction
b)Slag elimination
c) Reduction with something(dont remember)
d) All same temperature.
*** Then a question was given based on that fact H2O2 forms a blue layer with ether. Dont remember exactly the question nor the options
*** Solid State--Co-ordination number of BCC structure.
*** Mg has greater second ionization enthalpy than first. Yet it forms MgCl2 and not MgCl. Reason?
*** one periodic table question based on the trend of ionisation energy along the period.
*** two question of co-ordination. Dont remember it. One involved Hg(SCN)Co something....dont remember exactly. Other was something with charge on Cu but it was an easy one.
*** Amphoteric oxide : Ge2O, Na2O, SO2, Cl2O7
*** most soluble sulphate : CaSO4, SrSO4, BaSO4, another one from the same group.
will post more when and if i remember