Select the option that can be used as a one-word substitute for the given group of words. A thing or substance that is liable to catch fire easily
Inflammable
Understanding One-Word Substitution for Flammable Substances
The question asks for a single word that can replace the phrase "A thing or substance that is liable to catch fire easily". This requires us to find a word that describes something which ignites quickly and easily burns.
Analyzing the Options for Inflammable Substances
Let's examine the given options to determine which one best fits the description of a substance liable to catch fire easily.
- Inaudible: This word describes something that cannot be heard. It is related to sound, not fire or combustion. Therefore, this option is incorrect.
- Inflammable: This word is used to describe something that is easily set on fire; readily combustible. This definition perfectly matches the phrase "liable to catch fire easily".
- Incombustible: This word describes something that cannot be burned; incapable of combustion. This is the opposite of what the question is asking for. Therefore, this option is incorrect.
- Extinguishable: This word describes something that can be put out, usually referring to a fire or light. While related to fire, it describes the ability to be stopped, not the ability to start easily. Therefore, this option is incorrect.
Identifying the Correct One-Word Substitute
Based on the analysis of the options, the word that accurately describes a substance that is liable to catch fire easily is "Inflammable".
Detailed Comparison of Fire-Related Terms
Let's compare the terms related to fire and combustion presented in the options:
| Term | Meaning | Relevance to "Catches Fire Easily" |
|---|---|---|
| Inaudible | Cannot be heard | None |
| Inflammable | Easily set on fire; readily combustible | Directly matches the description |
| Incombustible | Cannot be burned | Opposite of the description |
| Extinguishable | Can be put out (fire) | Describes stopping a fire, not starting easily |
As the table shows, "Inflammable" is the only word among the options that means easily catching fire.
Conclusion on Inflammable Substances
The one-word substitute for "A thing or substance that is liable to catch fire easily" is Inflammable.
Revision Table: Key Vocabulary
| Word | Definition |
|---|---|
| Inflammable | Easily set on fire and burned. |
| Flammable | Also means easily set on fire and burned (synonym of inflammable). |
| Incombustible | Cannot be burned. |
| Combustible | Able to catch fire and burn. |
| Extinguishable | Able to be put out. |
Additional Information on Inflammability and Flammability
It's important to note that the words "inflammable" and "flammable" mean the same thing: easily set on fire. The "in-" prefix in "inflammable" does not negate the meaning, as it does in words like "inaudible" or "incombustible". This can sometimes cause confusion, but both terms indicate a substance that is highly likely to catch fire. The term "flammable" is now often preferred in safety labeling to avoid this confusion, but "inflammable" is still correct and widely used, especially in older contexts or general vocabulary questions.
Important Questions from Miscellaneous
A stone is thrown horizontally from the top of a 20 m high building with a speed of 12 m/s. It hits the ground at a distance R from the building. Taking g = 10 m/s2 and neglecting air resistance will give :
A sphere of volume V is made of a material with lower density than water. While on Earth, it floats on water with its volume f1V (f1 < 1) submerged. On the other hand, on a spaceship accelerating with acceleration a < g (g is the acceleration due to gravity on Earth) in outer space, its submerged volume in water is f2V. Then:
A railway wagon (open at the top) of mass M1 is moving with speed v1 along a straight track. As a result of rain, after some time it gets partially filled with water so that the mass of the wagon becomes M2 and speed becomes v2. Taking the rain to be falling vertically and the water stationery inside the wagon, the relation between the two speeds v1 and v2 is :
Consider the following statements:
1. Distance between the longitudes becomes zero on North Pole and South Pole.
2. Distance between the longitudes is maximum on the Equator.
3. Number of longitudes is more than number of latitudes.
Which of the statements given above is/are correct?
One block of 2⋅0 kg mass is placed on top of another block of 3⋅0 kg mass. The coefficient of static friction between the two blocks is 0⋅2. The bottom block is pulled with a horizontal force F such that both the blocks move together without slipping. Taking acceleration due to gravity as 10 m/s2, the maximum value of the frictional force is :
