Chemical Science,, Chemical Engineering

Q1
What is wrong with each of the following attempts to write an electron
configuration? Justify your answer with suitable explanation.
(a) 1s22s3
(b) 1s22s22p23s2
(c) 1s22s23s2
(d) 1s22s22p63s23d10
[5]
Q2 Given the following percent compositions, determine the empirical
formula.
(a) 47.26% Cu, 52.74% Cl
(b) 40.27% K, 26.78% Cr and 32.96% O
[5]
Q3 Discuss the classification of elements in the periodic table.
[5]
Q4 Explain different types of chemical bonds. [5]
Q5 Explain with the mechanism how the following buffer solutions maintain
fairly constant pH, even when a small amount of acid or alkali is added
to it.
(a) Acidic buffer (CH3COOH + CH3COONa) and
(b) Basic buffer (NH4OH + NH4Cl)
Posted Date: 11/26/2012 8:12:45 AM | Location : Oman







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