Which one of the following are amorphous?
Correct answer: D. Charcoal
- A. Ruby stone
- B. Glass
- C. Both a & b
- D. Charcoal
Explanation
The correct answer is Charcoal. Charcoal is an amorphous solid because it does not have a well-defined crystalline structure. Glass is also an amorphous solid; however, the option indicating 'Both a & b' is incorrect because ruby stone is crystalline. Ruby stone is a crystalline form of aluminium oxide. Therefore, option C is incorrect. Option B is incorrect because it does not include charcoal, which is also amorphous.
Last updated
Related questions
A 4.0 m long wire is subjected to stretching force and its length increases by 40 cm. The percent elongation which the wire undergoes is:
A ball falling in a lake of 200 m shows a decrease of 0.1% in its volume. The bulk modulus of elasticity of the material of the ball is: (take g = 10 m/s²)
A ball falling in a lake of 200 m shows a decrease of 0.1% in its volume. The bulk modulus of elasticity of the material of the ball is: (take g =10 m/s2)
A block weighing 40 kg extends a spring by 0.16m from its unscratched position. What is the value of k?
A body floats in a liquid contained in a beaker. The whole system, as shown, falls freely under gravity. The upthrust on the body due to the liquid is: