Single Choice

Which of the following change cannot be reversed?

AHardening of cement
Correct Answer
BFreezing of ice cream
COpening a door
DMelting of chocolate

Solution

A. Hardening of cement is an irreversible change as we cannot reverse back to the original cement powder form once the cement hardens.

B. Freezing of ice-cream is reversible change as it can be reversed back by heating and it will convert to original form.

C. Opening of a door is reversible change as it can be reversed simply by closing the door.

D. Melting of chocolate is reversible change as it can be reversed by cooling the chocolate to its original form.

Hence, option $$A$$ is the correct answer.


SIMILAR QUESTIONS

If $$R=\left\{\left(x,y\right):y=2x\right\}$$ is a relation in $$A=\left\{1,2,3,4,6,7,8\right\}$$ then write all the elements of $$R$$

Let $$X=\left\{1,2,3,4\right\}$$.Determine whether $$f=\left\{\left(1,1\right),\left(2,3\right),\left(3,4\right),\left(4,1\right)\right\}$$ are functions from $$X$$ to $$X$$

Let the universal set U, be a set all students of your school, A is set of boys. B is the set of girls C is the set of students participating in sports. Describe the following set in words and represent them by the Venn diagram. $$B \cap C$$

If $$A = $${1,4,6}, $$B = $${3,6}, then find $$(A \cap B)$$

Find the number of whole numbers in the solution set of following $$x - 5 <-2$$

Find the solution of the following: If $$5x + 4 > 8x - 11$$, then $$x

Say true or false. The A.M. between $$(a-b)^2$$ and $$(a+b)^2$$ is $$a^2+b^2 $$.

Given a line I and a point P on it. How many lines can be drawn passing through the point P?

If lines $$l_1\, \perp\, l_2$$ and the the slope of $$l_1$$ is $$\dfrac{1}{2}$$, then the the slope of $$l_2$$ is .......... .

Contact Details