Solution : Take two healthy potted plants which are nearly the same size. i) Keep them in a dark room for three days.ii) Now place each plant on separate glass plates. Place a watch glass containing potassium hydroxide by the side of one of the plants. The potassium hydroxide is used to absorb carbon dioxide.iii) …
Activity – Show that carbon dioxide is essential for photosynthesis. Read More »
Solution : What are Stomata? Stomata are the small (tiny ) openings that are present on the leaf epidermis. It is helpful to exchange gases Stomata are also found on stems and other parts of some plants. Structure of Stomata Each stoma is surrounded by two guard cells.The guards are kidney-shaped and contain chloroplasts.There is …
What are Stomata?What is Mechanism of opening and closing process of stomata ? Read More »
Autotrophic Nutrition Carbon and energy requirements of the autotrophic organism are fulfilled by photosynthesis. It is the process by which autotrophs take in substances from the outside and convert them into stored forms of energy. This material is taken in the form of carbon dioxide and water which is converted into carbohydrates in the presence …
Solution : The general requirement for energy and materials is common in all organisms, but it is fulfilled in different ways. Some organisms use simple food material obtained from inorganic sources in the form of carbon dioxide and water. These organisms, the autotrophs, include green plants and some bacteria. Other organisms utilise complex substances.These complex …
Differentiate Autotroph and Heterotroph
Solution Photosynthesis Definition : “Photosynthesis is the conversion of carbon dioxide (CO2), and water (H2O) into food (Glucose) and oxygen in the presence of sunlight and chlorophyll (Green pigment) by green plants, algae, and some microorganisms.“ Light energy is collected and used by green plants during the process to convert water, carbon dioxide, and minerals …
Solution : The Anomalous behaviour of second-period elements Second-period elements show anomalous behaviour due toi) small size,ii) high electronegativity,iii) absence of d-orbitals andiv) they form pπ−pπ bonds and pπ−dπ bonds, but do not form a dπ−dπ bond..
Solution : The general outer electronic configuration of s, p, d and f block elements : – The general outer electronic configuration of s block elements is ns (1−2) .The general outer electronic configuration of p block elements is ns 2 np (1−6) .The general outer electronic configuration of d block elements is (n−1)d(1−10) ns …
Write the general outer electronic configuration of s, p, d and f block elements. Read More »
Solution : Liquid metal at Room temperature is Mercury (Hg) having a melting point of −38.83 0 C. The Latin name of Mercury is hydrargyrum. Mercury is also known as quicksilver.
Solution : . Those elements exhibit some properties of both metals and non-metals., these elements are called metalloids or semi-metals. In the Modern Periodic Table, a zig-zag line separates metals from non-metals. The borderline elements – boron, silicon, germanium, arsenic, antimony, tellurium and polonium – are intermediate in properties and are called metalloids or semi-metals.
