Question

pH paper is separately dipped into two different solutions X and Y. Colour of pH paper turned pale green in X and blue in Y. X and Y are most probably - (a) X - H20, Y - NaOH (b) X - NaOH ,Y - H20 (C) X- HCI, Y- NaOH (d) X - NaOH, Y - HCI - Which one of the following metal oxides shows both acidic and basic characters (a) Na20 (b) K20 (C) Cuo Al2O2​

Answer 1

Answer:

A1) X- H₂0, Y-NaOH

because pale green on a ph scale is neutral and water is neutral. and blue on ph scale is a base and sodium hydroxide is a base

A2) Al₂O₂

Explanation:

Answer 2

Answer:

a) X - H₂0, Y - NaOH

Explanation:

What is a pH paper?

pH paper is used to determine if a solution is acidic, basic, or neutral.

According to the pH paper,

• Pale green has a pH of nearly 7 and thus is neutral. Hence, x = H₂0 (which is neutral)
• Blue in the pH paper means that the solution is basic in nature. Hence, the solution is NaOH (which is basic).

Therefore Option A is correct,  X - H₂0, Y - NaOH

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