Chemistry 2015 Waec Past Questions and Answers

Question 11 :

• WAEC 2015

The gas given off when ethanol reacts with sodium is

A. Carbon(IV)oxide
B. Hydrogen
C. Methane
D. Oxygen

Question 12 :

• WAEC 2015

Which of the following halogens is solid at room temperature?

A. Bromine
B. Chlorine
C. Flourine
D. Iodine

Question 13 :

• WAEC 2015

The alkaline earth metals have similar chemical properties because________?

A. They are in the same period
B. Their salts are colourless
C. They have the same number of valence electrons
D. They are very reactive

Question 14 :

• WAEC 2015

The number of unpaired electrons in an atom of an element ₈Q is _______?

A. 2
B. 4
C. 6
D. 8

Question 15 :

• WAEC 2015

The bond formed when ammonia reacts with hydrogen ion to form ammonium ion is

A. Covalent
B. Dative
C. Hydrogen bond
D. Ionic