Question

what happens when calcium is treated with water?
(1) it doesn't react with water
(2) it reacts violently with water
(3) it reacts less violently
(4) bubbles of hydrogen gas formed stick to the surface of calcium.
options:a) 1,4
b) 2,3
c) 1,2
d) 3,4​

Answer 1

After a second or so, the calcium metal begins to bubble vigorously as it reacts with the water, producing hydrogen gas, and a cloudy white precipitate of calcium hydroxide. ...

Answer 2

correct answer is three and four (3,4) so the correct option is D