ENTRANCE TEST – 2012 Multiple Questions and Answers.




16.With increase in the value of Principal Quantum Number ‘n’, the shape of the s-orbitals remains the same although their sizes
A. Decrease
B. Increase
C. Remain the same
D. May or may not remain the same

17.The angle between unhybridized p-orbital and three sp2 hybrid orbitals of each carbon atom in ether is:
A. 120°
B. 90°
C. 109.5°
D. 180°

18.In ‘H-F’ bond electronegativity difference is ‘1.9’. What is the type of this bond?
A. Polar covalent bond
B. Non-polar covalent bond
C. Pi (Ï€) bond
D. Co-ordinate covalent bond

19.‘ΔH’ will be given a negative sign in
A. Exothermic reactions
B. Decomposition reactions
C. Dissociation reaction
D. Endothermic reactions

20.Lattice energy of an ionic crystal is the enthalpy of
A. Combustion
B. Dissociation
C. Dissolution
D. Formation

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