CBSE MASTER | NCERT Textbooks Exercises Solutions

2018-01-05

Answer : The heat energy  absorbed by ice to change to liquid state, without showing any rise in temperature is known as the latent heat. We already know...

2018-01-05

(a) water at room temperature is a liquid. (b) an iron almirah is a solid at room temperature. Answer :  (a) water at room temperature is a liquid because...

2018-01-05

Answer : Physical states of water at given temperatures : (a) 25°C - Liquid as familiar water (b) 0°C  - Solid  as ice (c) 100°C- Gaseous as water...

2018-01-05

Answer : Substances in increasing order of forces of attraction between the particles. Oxygen Water Sugar This is an answered question from Chapter...

2018-01-05

(a) Naphthalene balls disappear with time without leaving any solid. (b) We can get the smell of perfume sitting several metres away. Answer : (a) Naphthalene...

2018-01-05

Answer : As we know 0° C =273.16 K. For convenience, we take 0° C = 273 K after rounding off the decimal. To change a temperature on the Kelvin scale...

2018-01-05

Answer : Kelvin is the SI unit of temperature, 0° C =273.16 K. For convenience, we take 0° C = 273 K after rounding off the decimal. To  convert a temperature...

2018-01-05

(a) Growth of a plant (b) Rusting of iron (c) Mixing of iron filings and sand (d) Cooking of food (e) Digestion of food (f) Freezing of water (g...

2018-01-05

(a) Sodium (b) Soil (c) Sugar solution (d) Silver (e) Calcium carbonate (f) Tin (g) Silicon (h) Coal (i) Air (j) Soap (k) Methane (l) Carbon...

2018-01-05

(a) Salt solution (b) Milk (c) Copper sulphate solution (d) Starch solution. Answer : Scattering of a beam of light passing through a suspension or a...