11th
In this category students supposed to ask questions which belong to std 11th maharashtra board Science
- A 50% solution of sulphuric acid is subjected to electrolyte oxidation and the product is hydrolysed See below image 2
- CO2 is passed into concentrated solution of NaCl, which is saturated with NH3 . ceunderset(Ammonia)2NH3_((aq))+H2O_((l)) + CO2_((g))->undersetAmmonium carbonate(NH4)2CO3_((aq)) ceundersetAmmonium carbonate(NH4)2CO3_((aq)... 1
- Lithium floats an water while sodium floats and catches fire when put in water. When lithium and sodium react with water, hydrogen gas is released. Due to these hydrogen gas bubbles, lithium and sodium floats on water. e... 2
- BeCl2 is covalent while MgCl2 is ionic. Be²⁺ ion has very small ionic size and therefore, it has very high charge density. Due to this, it has high tendency to distort the electron... 1
- Sodium dissolves in liquid ammonia to form a solution which shows electrical conductivity Sodium dissolves in liquid ammonia giving deep blue coloured solutions which is electrically conducting in nature. Na + (x + y) NH₃ → [Na(NH... 1
- Alkaline earth metals have low values of electronegativity; which decrease down the group Electronegativity represents attractive force exerted by the nucleus on shared electrons.The general outer electronic configuration of alkal... 2
- Standard reduction potential of alkali metals have high negative values. The general outer electronic configuration of alkali metals is ns¹. They readily lose one valence shell electron to achieve stable noble gas... 1
- Hydrogen shows similarity with alkali metals as well as halogens. Electronic configuration of hydrogen is 1s¹ which is similar to the outer electronic configuration of alkali metals of group 1 i.e., ns¹.How... 1
- Collect the information of preparation of dihydrogen and make a chart Chart: methods of preparing dihydrogen ( H₂ ) MethodReaction Laboratory: zinc granules with dilute acid Zn + 2HCl → ZnCl₂ + H₂ Laboratory: z... 1
- Write short notes A. Useful and harmful bacteria. Bacteria are both useful and harmful to humans. Useful bacteria Dairy: Lactobacillus converts milk into curd; bacteria are also used for che... 1
- Why is binomial nomenclature important? Binomial nomenclature is important because: The binomials are simple, meaningful and precise. They are standard since they do not change fro... 1
- What will be the shape of bacillus and coccus type of bacteria? The shape of bacillus type of bacteria is rod-shaped and coccus is spherical. 1
- What are the salient features of monera? Salient features of Kingdom Monera: Size: The organisms included in this kingdom are microscopic, unicellular and prokaryotic. Occurrence: T... 2
- Paramoecium : Ciliated Protist Plasmodium : a. Amoeboid protozoan b. Ciliophora c. Flagellate protozoan d. Sporozoan (d) Sporozoan 2
- Select odd one out for Heterotrophic bacteria. a. Nitrogen fixing bacteria b. Lactobacilli c. Methanogens d. Cyanobacteria c. Methanogens 1
- Causative agent of red tide is _____________. a. Dinoflagellate b. Euglenoid c. Chrysophyte d. Lichen (A) Dinoflagellate 2
- Which of the following shows single stranded RNA and lacks protein coat? a. Bacteriophage b. Plant virus c. Viroid d. Animal virus option (c) Viroid 2
- Find out information about any one sacred grove (devrai) in Maharashtra Devrai formed by two words Dev- god and Rai- forest, hence this is Sacred groves which are present in the tropical deciduous forests. a deta... 1
- Make herbarium under the guidance of your teacher You are expected to perform the given activity by themselves under the guidance of their teacher. A tutorial Video :: Courtesy :: ScienceTac... 2
- How can you, as an individual, prevent the loss of Biodiversity? As individuals, we can prevent loss of biodiversity in the following ways: Increasing awareness about environmental issues. Making posters t... 1
- Importance of botanical garden short note Importance: It is a place where there is an assemblage of living plants maintained for botanical teaching and research purpose. Botanical ga... 1
- Role of human being in biodiversity conservation. short notes Due to rapid increase in human population and industrialization, humans have over-utilized natural resources; leading to degradation of the... 1
- What do you understand from terms like in situ and ex situ conservation? In situ conservation: It includes conservation of species in their natural habitats. Grazing, cultivation and collection of products from th... 1
- Why do we have green house in botanical gardens? Greenhouse is a structure with suitable walls and a roof in which plants are grown under regulated climatic conditions. Most botanical garde... 1