MCQ
Which of the following changes cannot be reversed?
- ✓Hardening of cement
- BFreezing of ice cream
- COpening a door
- DMelting of chocolate
✓
Answer
Correct option: A.
Hardening of cement
Hardening of cement is an irreversible change. Changes that cannot be reversed are called irreversible changes.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Iron is a $...........$
→The milk producing animals are called:
Different flowers have petals of:
When lemon/ vinegar is added to warm milk, it is called:
Observe the given figure.
What is the purpose of this experiment?
What is the purpose of this experiment?
Directions: Read the passage $(s)$ given below and answer the questions that follow. Passage$-3$ Plants are the sources of food ingredients like grains, cereals, vegetables and fruits. Animals provide usmeat, meat products, eggs. Cows and buffaloes are milk providing animals. Which of the following came from animals source?
→Which one of the following is correct for the term 'mass'?
Directions: Match column $A$ with column $B$ and select answers using the code given below the columns.
→|
S.No.
|
Column $A$
|
S.No.
|
Comlumn $B$
|
|
$(A)$
|
Mustard |
$(p)$
|
Cheese, curd cream. |
|
$(B)$
|
Spices |
$(q)$
|
Rice, wheat, cereals. |
|
$(C)$
|
Oils |
$(r)$
|
Two parts of its plant are used as food items. |
|
$(D)$
|
Milk products |
$(s)$
|
Cows, goats, buffaloes. |
DIRECTIONS: Match Column$-I$ with Column$-II$ and select the correct answer using the codes given below the columns.
→|
S.No.
|
Column-$I$
|
S.No.
|
Column-$II$
|
|
$A.$
|
The process of removal of larger particles from smaller ones.
|
$(p)$
|
Decantation.
|
|
$B.$
|
The process of separation of butter from milk.
|
$(q)$
|
Filtration.
|
|
$C.$
|
The process of separation of components of a muddy water.
|
$(r)$
|
Churning.
|
|
$D.$
|
The process of separation of components of a mixture of oil and water.
|
$(s)$
|
Sieving.
|
Deficiency of which vitamin cause rickets?