NDA 2026
- Exam
- NDA
- Year
- 2026
- Subject
- General Ability
- Chapter
- General Science
NDA 2026 · General Ability · General Science
Consider the following pairs: I. Pigment TiO_2 II. Drier Turpentine...
Consider the following pairs:
How many of the pairs given above are correctly matched?
| I. Pigment | |
| II. Drier | Turpentine |
| III. Thinner | Naphthenates |
| IV. Antiskinning agent | Polyhydroxy phenol |
How many of the pairs given above are correctly matched?
Options
- AOne
- BTwo
- CThree
- DAll the four
Correct answer
B. Two
Step-by-step solution
Pigments provide colour and hiding power to the paint. is a widely used white pigment. Pair I is correctly matched.
Driers accelerate the drying of the paint film by catalysing the oxidation of the drying oil. Common driers are naphthenates, resinates, and linoleates of metals like cobalt, manganese, and lead. Pair II is incorrectly matched.
Thinners are volatile solvents added to reduce the viscosity of the paint, making it easier to apply. Turpentine is a common thinner. Pair III is incorrectly matched.
Antiskinning agents are added to prevent the formation of an insoluble skin on the surface of the paint during storage. Polyhydroxy phenols are commonly used for this purpose. Pair IV is correctly matched.
Thus, exactly two pairs (I and IV) are correctly matched.
Answer: Two
Driers accelerate the drying of the paint film by catalysing the oxidation of the drying oil. Common driers are naphthenates, resinates, and linoleates of metals like cobalt, manganese, and lead. Pair II is incorrectly matched.
Thinners are volatile solvents added to reduce the viscosity of the paint, making it easier to apply. Turpentine is a common thinner. Pair III is incorrectly matched.
Antiskinning agents are added to prevent the formation of an insoluble skin on the surface of the paint during storage. Polyhydroxy phenols are commonly used for this purpose. Pair IV is correctly matched.
Thus, exactly two pairs (I and IV) are correctly matched.
Answer: Two