Paint Components Matching: Analysis

This question requires evaluating four pairs of chemical substances and their roles in paint formulations. We need to determine which pairs are correctly matched based on standard paint chemistry.

Analyzing Pairs

• I. Pigment: \(\text{TiO}_2\)
  Titanium dioxide (\(\text{TiO}_2\)) is a primary white pigment used extensively in paints for its opacity and brightness. This is a correctly matched pair.
• II. Drier: Turpentine
  Driers are catalysts that speed up the oxidation and polymerization of drying oils in oil-based paints. Turpentine is a volatile solvent used as a thinner to reduce viscosity. Thus, this is an incorrectly matched pair.
• III. Thinner: Naphthenates
  Naphthenates, such as cobalt naphthenate, are commonly used as driers in oil-based paints. Thinners are solvents like turpentine or mineral spirits. Therefore, this is an incorrectly matched pair.
• IV. Antiskinning agent: Polyhydroxy phenol
  Antiskinning agents prevent the formation of a surface skin on paint during storage by inhibiting oxidation. Certain phenolic compounds, including polyhydroxy phenols, can function effectively in this role. This is a correctly matched pair.

Conclusion on Matches

Based on the analysis:

• Pair I is correctly matched.
• Pair II is incorrectly matched.
• Pair III is incorrectly matched.
• Pair IV is correctly matched.

There are exactly two correctly matched pairs (I and IV).

Final Answer Determination

The number of correctly matched pairs is two. This corresponds to Option B.