Question

Plz answer questions from 1to 5
Answer for brainliest
Useless answers shall be reported
Don't give wrong answers
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PlZ

Answer 1

1.C)$CaC_{2} O_{4}$


2.B)$M_{2}O_{3}$ (Valency of m is 3 and of oxygen is 2)


3.A)MS (valency of both is 2)


4.D)H+, $O_{2}^{-2}$


5.B)2,3,22