EXAM PRACTICE SHEET 4
Question 1 (Problem solving)
A student is given 3 metals, X, Y, and Z, and is told they are calcium, tin, and zinc. The
student performs several different experiments and notes their observations in the table
below.
Metal
X
Y
Z
Reaction with different substances
Water
Dilute HCl solution
O2 in the air
Fizzing, production of H2 gas, Reacting moderately
Slow reaction
and formation of a salt
in air
Slight reaction with
Slow reaction with warm
Reacting slowing and
steam
acid only
only when heated
Fizzing and production Fizzing, production of H2 gas,
Burning readily and
of H2 gas
and formation of a salt
quickly in air
i. Based on the observation, identify metals X, Y, Z.
ii. Give your reason(s) in part i.
iii. Write down the chemical reaction equation occurred when X with dilute sulphuric acid
solution. You need to use the correct chemical symbol of element X, balanced the
equation with labelled states.