Question

Which of following oxides will turn red litmus blue and which will turn blue litmus solution red?Na2O,SO2,N2O5,CaO.​

Answer 1

Nao2

Explanation:

Blue litmus paper turns red under acidic conditions and red litmus paper turns blue under basic or alkaline conditions, with the color change occurring over the pH range 4.5–8.3 at 25 °C (77 °F). Neutral litmus paper is purple. ... For instance, ammonia gas, which is alkaline, turn the red litmus paper blue.

Answer 2

Answer:

• red litmus to blue - Na2O, CaO
• blue litmus to red - SO2, N2O5