(a) Water at room temperature is a liquid because its freezing point is 0°C and boiling point is 100°C. (b) An iron almirah is a solid at room temperature because melting point of iron is higher than room temperature.
(a) Water at room temperature is a liquid because its freezing point is 0°C and boiling point is 100°C.
(b) An iron almirah is a solid at room temperature because melting point of iron is higher than room temperature.
(a) Naphthalene balls disappear with time without leaving any solid, because naphthalene balls sublime and directly changes into vapour state without leaving any solid. (b) We can get the smell of perfume sitting several metres away because perfume contain volatile solvent and diffuse faster and canRead more
(a) Naphthalene balls disappear with time without leaving any solid, because naphthalene balls sublime and directly changes into vapour state without leaving any solid.
(b) We can get the smell of perfume sitting several metres away because perfume contain volatile solvent and diffuse faster and can reach people sitting several metres away.
Give two reasons to justify: (a) water at room temperature is a liquid. (b) an iron almirah is a solid at room temperature.
(a) Water at room temperature is a liquid because its freezing point is 0°C and boiling point is 100°C. (b) An iron almirah is a solid at room temperature because melting point of iron is higher than room temperature.
(a) Water at room temperature is a liquid because its freezing point is 0°C and boiling point is 100°C.
See less(b) An iron almirah is a solid at room temperature because melting point of iron is higher than room temperature.
What is the physical state of water at the following temperature?
(a) 25°C is liquid (b) 0°C is solid or liquid (c) 100°C is liquid and gas
(a) 25°C is liquid (b) 0°C is solid or liquid
See less(c) 100°C is liquid and gas
Arrange the following substances in increasing order of forces of attraction between the particles
Oxygen —> water —> sugar.
Oxygen —> water —> sugar.
See lessGive reason for the following observations. (a) Naphthalene balls disappear with time without leaving any solid. (b) We can get the smell of perfume sitting several meters away.
(a) Naphthalene balls disappear with time without leaving any solid, because naphthalene balls sublime and directly changes into vapour state without leaving any solid. (b) We can get the smell of perfume sitting several metres away because perfume contain volatile solvent and diffuse faster and canRead more
(a) Naphthalene balls disappear with time without leaving any solid, because naphthalene balls sublime and directly changes into vapour state without leaving any solid.
See less(b) We can get the smell of perfume sitting several metres away because perfume contain volatile solvent and diffuse faster and can reach people sitting several metres away.
Convert the following temperatures to the Kelvin scale.
(a) 25°C into K 25 + 273 = 298 K (b) 373°C into K 4 373 + 273 = 646 K
(a) 25°C into K
See less25 + 273 = 298 K
(b) 373°C into K 4 373 + 273 = 646 K