Question

Which one of the following is a desirable change?
(A) Burning of house
(B) Floods
(C) Landslides
(D) Burning of cooking gas

Answer 1

Hint:We know that change is the law of nature that occurs at all times and every day in our lives. There are two types of changes which are desirable changes and undesirable changes. In simple words we can say that the changes that we want to occur are desirable changes and the one we don’t want to occur are undesirable changes.

Complete answer:
Desirable changes are the one which are brought about by nature and results produced by these changes are good results or useful results. Example: rain bringing water to the crops, milk changing into curd, ripening of seedlings of fruits into a plant. On the other hand, undesirable changes are those changes which are brought about by nature or man and the result produced by these changes are useless or bad results. Example: Rain causing destruction by floods, milk turning sour on a hot day, cutting of trees. So, among the following options we know that burning of house, floods and landslides are all-natural calamities and can never be useful for the environment or to mankind so these changes are the examples of undesirable changes.Whereas burning of cooking gas will be a desirable change as cooking gas is composed of mainly methane and other low carbon composition hydrocarbons and is also flammable so it usually does not cause any harm.

Therefore, the correct answer will be Option (D).

Note: As we know that the cooking gas is lighter than air and can disperse easily so when there will be a leakage it will be very hard to detect it as the cooking gas is colorless, odorless and tasteless and since it is highly combustible it can cause damage but still it is one of the most viable alternatives to other fossil fuels.