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Waec Chemistry 2011 Past Questions and Answers

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Waec 2011 Chemistry Past Questions

Question 6:


An element with the electron configuration of 1s 22s 22p 6 would have a combining power of

A. O
B. 2
C. 6
D. 8


Question 7:


Rare gases are stable because they

A. Contain equal number of protons and neutrons
B. Contain more electrons than protons
C. Are chemically active
D. Have octet structure


Question 8:


Which of the following elements would produce coloured ions in aqueous solution?

A. Calcium
B. Lron
C. Magnesium
D. Sodium


Question 9:


The energy change that accompanies the addition of an electron to an isolated gaseous atom is

A. Bond energy
B. Electronegativity
C. Electron affinity
D. Ionization energy


Question 10:


Which of the following hydrohalic acids is the weakest?

A. HBr
B. HCI
C. HF
D. HI






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