Question

9 A small piece of calcium metal is put into a small
trough containing water. There is effervescence and
white turbidity is formed.
(a) Name the gas formed in the reaction. How would you
test the gas ?
(b) Write an equation for the reaction.
(c) What do you observe when a few drops of
red litmus solution are added to the turbid
solution ?​

Answer 1

Answer

a) Hydrogen gas, It can be tested by litmus paper as it turn blue from red.

b) Ca + 2H2O → Ca(OH)2 + H2

c) The solution turns blue.