Question

X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. If X is a non metal, then the litmus will turn:

• A. Red to blue
• B. Blue to red
• C. No change on red litmus
• D. Both $B$ and $C$

Answer 1

Answer: (D)

Both $B$ and $C$

If "X" is non-metal then when dissolved in water gives acidic oxide.

We know acids turn blue litmus red.

So the blue litmus will turn red while the red litmus remains the same.

So, Option (D) is correct.