Write the name and structural formula of the compound obtained when ethanol is heated at 443 K with excess of conc H₂S0₄ Also write chemical equation for the reaction stating the role of cone. H₂S0₄ in it.

List two advantages associated with water harvesting at the community level.

Everyone of us can do something to reduce our personal consumption of various natural resources. List four such activities based on 3-R approach.

Write the number of periods the Modem Periodic Table has. State the changes in valency and metallic character of elements as we move from left to right in a period. Also state the changes, if any, in the valency and atomic size of elements as we move down a group.

Name the following:

(i) Thread like non-reproductive structures present in Rhizopus.

(ii) 'Blobs' that develop at the tips of the non-reproductive threads in Rhizopus.