Write some daily activities collected from farmers, houses and nearby small industries about physical and chemical change?

Write the information you collected from the farmers and farming field about absorption of water and minerals by root and stem to enhance nutrition of plants?

Draw a diagram of the activity you perform to observe the reaction between an iron nail and copper sulphate solution. Is it a physical // Chemical change?

Write some chemical names of the substances, that are used in your house.

Collect the data of plants from a park nearby you and fill in the table in and write a report on it.

write some chemical reactions occurring in our daily life

Collect some articles and photographs from news papers and magazines about storms and cyclones. Make a story on the basis of what you learnt in this chapter.

Only the surface atoms in an adsorbent, play an active role in adsorption. These atoms posses some residual forces like vander Waal's forces and chemical forces. In the process of adsorption, weak adsorbate is substituted by strong adsorbate. Activated charcoal used in gas mask is already exposed to the atmospheric air, so the gases and water vapours in air are adsorbed on its surface. When the mask is exposed to chlorine atmosphere, the gases are displaced by chlorine. Porous and finely powdered solids, e.g., charcoal and Fuller's earth adsorb more as compared to the hard non-porous material. It is due to this property that the powdered characoal is used in gas masks. In general, easily liquefiable gases like CO_2, NH_3, Cl_2 , and SO_2 etc., are adsorbed to a greater extent than the elemental gases, eg., H_2, N_2, O_2, He , etc. Which of the following gases will substitute O_2 from adsorbed charcoal

Write some chemical equation occurring in our daily life.

Write two sentences about insulin hormone using the data collected from your school library.

Observe your surroundings carefully and write any three situations of your daily life where you can observe lines and angles. Draw the pictures in your note book and collect some pictures.