chemistry Important Questions
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Chemistry Test 3×10, 5×3. Maximum time: 75minutes
- Define a. Orbital b. Node c. Sideways overlapping d. Hyperconjugation e. olefins f. Rotamers
- Draw boundary surface diagram of d-orbitals and p-orbitals.
- a. compare covalent radius and vander waal radius. b. Compare inter and intra hydrogen bond
- Draw Lewis structure of CO2 and O3 and find forma charge on each atom.
- Define dipole moment. Write some postulates of Fajans rule.
- Write E.C and write number of unpaired electrons a. Ni2+ b. Fe2+ c. Cu+.
- Explain a. Heigenberg uncertainty principle b. Pauli exclusion principle c. Hund rule of maximum multiplicity.
- Explain the mechanism of free radical substitution reaction.
- Write IUPAC name of the following: a. CH3(CH2)2(OH)CH2CH2CHO b. CH3NHCH3 c. CH3CH2CH2COBr write molecular formula of the following a. O-xylene b. Ethyl propanoate c. C6H5(OMe)
- Derive relation between Kc and Kp. Find Ph of solution which is mixture of 10ml of .2M H2SO4 and 20 ml of .1M HCl.
- Write effect of reactant, pressure and catalyst on equilibrium. Define buffer solution write it’s examples. Define molar solubility.
- a. Find radius and energy of 2nd orbit of Li2+ ion. b. Find kinetic energy of electron whose wave length is 4500 angstrom. c. Find ionization energy of He+ ion to give He2+. d. If Ksp of reaction A2B(s)+H2O—–>2A+ + B- is 8×10^-6. Find molar solubility.
- a. Draw Newman projection of ethane b. Compare dipole moment of NH3 and NF3 c. Draw hybrid orbitals of Ethene d. Find all quantum number of last electron of 4d^7. e. Find hybridization of PCl5.