Question

3. Assertion (A) ice floats on water
Reason (R): Density of water is more than density of ice
choose the correct option.
A) Both and R are true and R is correct explanation to A
B) Both A and R are true and is not correct explanation to A
c) Both A and R ane false
D A is true but R is false​

Answer 1

Answer:

(a). Both assertion (A) and reason(R) is true and reason (R) is the correct explanation to assertion (A).

Explanation:

Water has higher temperature than ice due which the molecules of H2O is water has more kinetic energy and the bounce over each other and are close. Hence, they have more density.

Whereas,

Molecule of H2O in ice have very less kinetic energy due to loss of heat. Therefore they are a little far away from each other compared to molecules of H2O in liquid water. Hence, they have less density.

Ice being less dense than water floats over water.

Therefore,

Both assertion (A) and reason(R) is true and Reason is the correct explanation to Assertion.

Answer 2

Answer:

Both (A) and R are true and R is correct explanation to A.

Therefore, the option (A) is correct.

Explanation:

Generally, liquids have lesser density than that of solids. Water is also liquid, it should have lesser density than that of ice. But actually, water shows abnormal behavior about this.

• Ice is solid. It has cage like structure because of the presence of strong hydrogen bonds between the water molecule in the solid state. Hydrogen bonding provides the ice such type of structure in which lots of empty spaces between the water molecules.
• In water (as liquid) , the weak hydrogen bonding is present between the molecules but molecules can freely move. So, they didn't have much empty spaces.
• Therefore, the density of water is more then the density of ice.
• Lesser the density means lighter the object. Therefore, ice floats on water because it has lesser density than water.