Advertisements
Advertisements
प्रश्न
If same mass of liquid water and a piece of ice is taken, then why is the density of ice less than that of liquid water?
Advertisements
उत्तर
The mass per unit volume (i.e., mass/volume) is called density. Since water expands on freezing, therefore, volume of ice for the same mass of water is more than liquid water. In other words, density of ice is lower than liquid water and hence ice floats on water.
APPEARS IN
संबंधित प्रश्न
Among NH3, H2O and HF, which would you expect to have highest magnitude of hydrogen bonding and why?
Why is it said that-
Water is a universal solvent.
Sea water is a bad conductor of electricity.
State whether the following statement is true or false.
The substance in which a solute dissolves is called a solvent.
Why should a glass bottle completely filled with water never be kept in a freezer?
Define the following.
Freezing point
Give reasons: Lakes freeze from top towards bottom.
\[\ce{H2O2}\] is a better oxidising agent than water. Explain.
Why does water show high boiling point as compared to hydrogen sulphide? Give reasons for your answer.
How will you account for 104.5° bond angle in water?
Write two reactions to explain amphoteric nature of water.
The boiling point of water increases with ______ in pressure.
Pure water boils at ______ °C at one atmospheric pressure.
One gram of water requires ______ of heat to raise its temperature by l°C.
Water is circulated around the car engine using the ______ pump and the heat is absorbed.
What is the taste of distilled water & boiled water?
Which of the following ion is responsible for the temporary hardness of water?
The density of gold is 19 g/cm3. If 1.9 × 10−4 g of gold is dispersed in one litre of water to give a sol having spherical gold particles of radius 10 nm, the number of gold particles per mm3 of the sol will be ______ × 106.
The water having more dissolved O2 is ______.
