Question

Pritam has samples of a non-metallic oxide X and a metallic oxide Y. He added water to the samples in two test
tubes. He then tested the solutions with red and blue litmus paper.
Which of the following is he likely to observe?
X in water
Reaction to litmus
Y in water
Reaction to litmus
P
red remains red
red remains red
Q
blue turns red
blue remains blue
R
red turns blue
red turns blue
S
blue remains blue
blue turns red​

Answer 1

Answer:

Litmus paper is used to test whether the given solution is acidic or alkaline in nature. Litmus paper is a natural indicator. Indicators are red in acids and blue in bases. In other words, acids change blue litmus paper to red; bases change red litmus paper to blue. MgO, K2O and ZnO are basic oxides while CO2 is the acidic oxide. 

So, the given acidic oxide of carbon, i.e., carbon dioxide turns blue litmus red.