Question

Which among the following is not an example for a fact ?

• A. Metals conduct electricity
• B. Water boils at 100 C
• C. Sodium hydroxide solution turns red liinmus to blue
• D. Nut cracker is a simple machine

Answer 1

Answer:

D. Nut cracker is a simple machine

• A nutcracker is a concrete example or an application of a simple machine.

• A scientific fact is a specific observation or an objective, empirical truth verified through experimentation.

• Metals conduct electricity: A factual, observable property of metallic bonds.

• Water boils at 100°C: A standard, measurable temperature fact at sea level.

• Sodium hydroxide solution turns red litmus to blue: A reliable, observable chemical test result for bases.