Question

Case: During performing an experiment on neutralisation reaction, Ravi took about 100 mL of
sodium hydroxide solution and pour approximately the same amount of concentrated
hydrochloric acid to it.
He observed a very vigorous reaction with evolution of large amount of heat. When he dipped
litmus paper into the solution it turned red. He was surprised with the result though he had
read all the instructions and precautions given to him by his teacher.
16 What was the expected result of the experiment?
a) solution will be acidic and litmus paper will change to red
b) solution will be basic and litmus paper will change to blue
c) solution will be neutral and litmus paper will change to blue
d) solution will be neutral and litmus paper will change to colourless
17 What went wrong in the experiment performed by Ravi? a)
addition of less amount of concentrated acid
b) addition of concentrated hydrochloric acid instead of dilute hydrochloric acid c)
addition of dilute hydrochloric acid
d) addition of dilute hydrochloric acid instead of concentrated hydrochloric acid

Answer 1

Answer:

a)

Explanation:

solution will be acidic and litmus paper will change to red