Fill in the blanks
(a) Plants are called as J______ because they fix carbon dioxide.
(b) in an ecosystem dominated by treezs, the pyramid (of numbers ) is ______type.
(c) In aquatic ecosystem, the limiting factor fro the productivity is _______
(d) Common detritivores in our ecosystem are _______
(e) The major reservoir of carbon on earth is _______

Fill in the blanks : Plants are called as ............because they can fix carbon dioxide .

Fill in the blanks : In aquatic ecosystems, the limiting factor for the productivity is ..........

Fill in the blanks : In ecosystem dominated by trees, the pyramid (of number) is ............type .

Fill in the blanks : (a) A number which has only two factors is called a ______. (b) A number which has more than two factors is called a ______. (c) 1 is neither ______ nor ______. (d) The smallest prime number is ______. (e) The smallest composite number is _____. (f) The smallest even number is ______.

Fill in the following blanks: (a) Common salt is obtained from sea-water by the process of_____ (b) Rock salt is mined just like_____ (c) Chemical formula of washing soda is_____ (d) Sodium hydrogencarbonate is_____ soda whereas sodium carbonate is ______soda. (e). The chemical formula of plaster of Paris is______

Answer the following : (a) How many types of fission are possible of a covalent bond? (b) how many types of ions are formed by heterolytic fission and what are their names? (c) What are the names and nature of the parts formed by homolytic fission? (d) How many electrons are present in the valence shell of the carbon atom of the carbonium ion? (e) How many electrons are present in the valence shell of carbon atom of the carbanion ion? (f) Name the attacking reagents and give their nature. (g) Write the names of the parts obtained when C-Cl bond of ethyl chloride undergoes heterolytic fission. (h) What is the major factor that influences the relatives stabilities of carbocations, carbanions and free radicals.

Fill in the following blanks with suitable words: ltbr. (a). The corrosion of iron is called. (b) _____ and ____ are necessary for the rusting of iron. (c). The process of depositing a thin layer of zinc on iron articles in called. (d). Tiffin boxes are electroplated with ____but car bumbers are electroplated with ______to protect them fro rusting (e) The corrosion of copper produces a_____coating of basic copper carbonate on its surface. (f). Brass in an alloy of copper and ____ (g) Bronze is an alloy of copper and_____ (h) The non-metal present in steel is_____ (i) The alloy in which one of themtals is mecury is called an _____ (j) the electrical conductivity and melting point of an alloy is_____than that of pure metals. (i) The rocky material found with ores is called._____

read the following statements and choose the option which is the set of correct statements. (a) sun is the source of energy for grazing food chains. (b) in aquatic ecosystem, DFC is the major conduit of energy flow (c) some organism of DFC prey to GFC animals. (d) ecosystem can support unlimited number of trophic levels. (e) waves provide stability to the ecosystem

Fill in the blanks of the paragraph given below with the words provided in the box. chlorophyll, energy, food, carbon dioxide, water, photosynthesis Leaves have a green pigment called (a) ____ which captures (b)______ from sunlight. This (c )______ is used in the process of (d)______ and along with other raw materials like (e )______ and (f)______ synthesize (g)______.