B, turns red litmus paper to blue
ANSWER

EXPLANATION
Given that;
The two reactants are KBr and CaO
Double replacement reaction is a type of chemical reaction that occur when two reactants exchange cations and anions to yield new products.

Therefore, the resulting products of the given data are K2O + CaBr2
The correct answer is option B
Answer: D
Explanation:
A has more kg/mass than B
I had the same problem last week it B