Question

Which of the following option is correct according to the following table?

$\begin{array}{cccc}1& Cation& A& P{O}_4{}^{3-}\\ 2& Anion& B& Manganesedioxide\\ 3& OxidisingAgent& C& Carbon\\ 4& ReducingAgent& D& N{a}^{+}\end{array}$

• A. 1-D , 2-A , 3-C , 4-B
• B. 1-A , 2-D , 3-B , 4-C
• C. 1-D , 2-A , 3-B , 4-C
• D. 1-A , 2-D , 3-C , 4-B

Answer 1

The correct option is C

1-D , 2-A , 3-B , 4-C

Atoms which carry positive charge are called cations and the atoms which carry negative charge are called anions. So, $N{a}^{+}$ is a cation and $P{O}_4{}^{3-}$ is an anion.

An oxidizing agent is one that oxidizes other substances by either accepting electrons or by providing oxygen or an electronegative ion. Manganese dioxide, red lead, etc are oxidizing agents.

A reducing agent is one that reduces other substances by providing electrons, or by providing hydrogen or an electropositive ion. Carbon, hydrogen sulphide, carbon monoxide, etc. are reducing agents.

$\begin{array}{cccc}1& Cation& A& N{a}^{+}\\ 2& Anion& B& P{O}_4{}^{3-}\\ 3& OxidisingAgent& C& Manganesedioxide\\ 4& ReducingAgent& D& Carbon\end{array}$