Name the process by which the components of following mixtures can be separated.
(a) Powdered glass and sugar
(b) Chalk powder and iron filings
(c) Chaff and grain
(d) Salt and water
(e) Wheat and sugar
(f) Sand and camphor
(g) Sugar and water

Name the process by which the components of following mixture can be separated. Water and mustard oil

Name the process by which the components of following mixture can be separated. Ammonium chloride and sand

Which can preserve food stuff ? (a) Sugar and vinegar (b) Salt and sugar (c) Vinegar (d) All the above

Which of the following are chemical changes ? (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) Burning of a candle

Suggest separation technique(s) one would need to employ to separate the following mixtures. (a) Mercury and water (b) Potassium chloride and ammonium chloride (c) Common salt, water and sand (d) Kerosene oil, water and salt

A man takes large amount of protein. He is likely to excrete more amount of (a) Urea (b) Uric acid (c) Sugar (d) Salts and water

Name the process associated with the following (a) Dry ice is kept at room temperature and at one atmospheric pressure. (b) A drop of ink placed on the surface of water contained in a glass spreads throughout the water. (c) A potassium permanganate crystal is in a beaker and water is poured into the beaker with stirring. (d) An acetone bottle is left open and the bottle becomes empty. (e) Milk is churned to separate cream from it. (f) Settling of sand when a mixture of sand and water is left undisturbed for some time. (g) Fine beam of light entering through a small hole in a dark room. Illuminates the particles in its paths.

Classify the following into levers as class I, class II or class III: (a) a door (b) a catapult (c) claw hammer (d) a wheel barrow (e) a fishing rod. (f) sugar tongs.

In which of the following process, convection does not take place primarily? (a) Sea and land breeze (b)Boiling of water (c) Warming of glass of bulb due ot filament (d) Heating air around a furnace

Name the phenomenon which causes the following changes: (a) Formation of water vapour from water. (b) Disappearance of camphor when exposed to air. (c ) Conversion of ice into water. (d) Conversion of water into steam.