(PHYSICAL AND INORGANIC CHEMISTRY)
- All questions are compulsory.
- Answers of both the sections should be written in same answer book.
- Draw well labelled diagrams and write balanced equations wherever necessary.
- Figures to the right indicate full marks.
- Use of logarithmic table is allowed.
- Every new question must be started on a new page.
Define boiling point
Write the formula to determine the molar mass of a solute using freezing point depresssion method.
Define enthalpy of sublimation.
How is enthalpy of sublimation related to enthalpy of fusion and enthalpy of vaporization?
Silver crystallises in FCC structure. If density of silver is 10.51 gcm-3, calculate the volume of unit cell.
[Atomic mass of slive (Ag) = 108 gm-1]
The vapour pressure of pure benzene is 640mm og Hg. 2.175×10-3kg of non-vloatile solute is added to 39 gram of benzene the vapour pressure of solution is 600mm of HG. Calculate molar mass of solute.
[C = 12, H = 1]
Calculate C-Cl bond enthalpy from following reaction:
CH3Cl(g) + Cl2(g) → Ch2Cl2(g) + HCl(g) ΔH° = -104KJ
If C-H, Cl-Cl and H-Cl bond enthalpies are 414, 243 and 431 KJ-Mol-1 respectively.
Write four points of differences between properties of nitrogen and other elements of group 15.
Explain the structure of ClF3
Conductivity of a solution is 6.23 x 10-5 Ω-1cm-1 and its resistance is 13710Ω. If the electrodes are 0.7cm apart, calculate the cross-sectional area of electrode.
What are neutral oxides?
Define "Molar conductivity".
Define "zero order reaction".
In a first order reaction x → y, 40% of the given sample of compound remains unreacted in 45 minutes. Calculate rate constant of the reaction.
Define "zero order reaction".
The molecular formula H2S2O2 represents which oxoacid?
- Hydrosulphurous acid
- Thiosulphurous acid
- Sulphuric acid
- Pyrosulphurous acid
Iodine exists as
- polar molecular solid
- ionic solid
- nonpolar molecular solid
- hydrogen bonded molecular solid
Absolute entropies of solids, liquids and gases can be determined by
- Measuring heat capacity of substance at various temperatures
- Subtracting standard entropy of reactants from products
- Measuring vibrational motion of molecules
- Using formula ΔS° = ST° - SO°
The determination of molar mass from elevation in boiling point is called as
The process of leaching alumina, using sodium carbonate is called
- Bayer's process
- Cyanide process
- Hall's process
On calculating the strength of current in amperes if a charge of 840C (coulomb) passes through an electrolyte in 7 minutes, it will be
A → B is a first order reaction with rate 6.6 × 10-5m-s-1. When [A] is 0.6m, rate constant of the reaction is
- 1.1 × 10-5s-1
- 1.1 × 10-4s-1
- 9 × 10-5s-1
- 9 × 10-4s-1
How is chlorobenzene prepared from aniline?
How is chlorobenzene converted into diphenyl/biphenyl?
How is 1-nitropropane prepared from suitable oxime?
How are 2 - nitropropane prepared from suitable oxime?
Explain Optical activity
Explain Interstitial compounds
Write the formula of Tetraminodichloroplatinum (IV) chloridex.
How is propene converted into 1- bromopropane and 2 - bromopropane?
Explain the mechanism of esterification
Write the reactions involved in dehydration of 1°, 2° and 3° alcohols.
What are vitamins?
Name any two diseases caused by deficiency of Vitamin A
Write the structure of a nucleoside
Write the structure of a nucleotide
How are 1 - nitropropane, 2-nitropropane and 2-methyl 2- nitropropane are distinguished from each other using nitrous acid?
The preparation of alkyl fluoride from alkyl chloride, in presence of metallic fluorides is known as
(a) Williamson’s reaction
(b) Finkelstein reaction
(c) Swarts reaction
(d) Wurtz reaction
Identify the weakest acidic compound amongst the following
On acid hydrolysis, propane nitrile gives
(b) acetic acid
(d) propanoic acid
Which of the following amines yields foul smelling product with holoform and alcoholic KOH?
(a) Ethyl amine
(b) Diethyl amine
(c) Triethyi amine
(d) Ethyl methyl amine