Chemical changes are .
Mostly reversible
Mostly irreversible
Always reversible
Always irreversible
Which of the following is a chemical change?
Rusting of iron
Condensation
Evaporation
Knitting of wool
When water freezes, its density
Increases
Decreases
Remains the same
None of the above
Which of the following given below is an example of reversible change?
Evaporation of water
Cooking of food
Ripening of fruit
Blooming of flowers
Which is correct?
Iceberg has higher density than water.
Iceberg has lower density than water.
Iceberg has same density than water.
Iceberg has no density.
Burning of paper is a
Physical change
Chemical change
Both of the above
Evaporation is a:
Permanent change
Which is the correct statement?
The solubility of sugar in water is more than the solubility of salt in water.
The solubility of sugar in water is less than the solubility of salt in water.
The solubility of sugar in water is equal to the solubility of salt in water.
The solubility of sugar in water is sometimes less and sometimes more than the solubility of salt in water.
Which of the following given below is not an example of irreversible change?
Melting of chocolate
Cooking of food is a .