Question

Four solutions A, B, C and D turn pH paper red,
yellow, green and blue respectively. Which of the
following is the aqueous solution of sodium oxide?​

Answer 1

Answer:

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Answer 2

Answer:

An aqueous solution of sodium oxide is alkaline and pH paper turns blue when it comes in contact with alkaline solutions. Hence, solution D is the aqueous solution of sodium oxide.

Explanation:

• pH paper Red indicates the solution A is strongly acidic.

• pH paper yellow indicates the solution B is weakly acidic .
• pH paper green indicates the solution C is neutral.
• The pH paper  test is performed by placing a small drop of sample onto the colored paper.
• Usually, pH paper paper is either red or blue. Red paper turns blue when the pH is alkaline, while blue paper turns red when the pH turns acidic.