Escience zone

Posts

Ncert Class 12th Solution part-2

Chemistry Chapter -Solution Part-2 How do you find the molar mass of Colligative properties? How do you find the molar mass of a solute? How do you determine Colligative properties? How do you find the molecular weight of an unknown compound? Topics to be covered in this Post Molality Molarity Normality Mole fraction Colligative properties Molality:- It is defined as the total moles of solute dissolved in the weight of the solvent . Molality = Number of moles of solute/weight of solvent in (k.g.) It is denoted by "m" Its unit is moles/kg. Molarity:- It is defined as total number of moles of solute dissolved in the volume of the solution. Molarity = Number of moles of solute/volume of solution(ltr) It is denoted by "M" its unit is moles/ltr Normality = It is defined as the number o

NCERT Solutions For Class 12 Chemistry Chapter 2 Solutions

Solution As per the syllabus, what do we learn in Class 12 Chemistry Chapter 2 - Solutions? How important is the class 12 chemistry Chapter 2 - Solution is as per the examination? What are the steps to score well in Class 12 Chemistry? Topics:- Intro Types of solution according to components. Types of solution according to solvent and solute. Factor affecting solubility of the solution. Ideal and the non-ideal solution. Henry law. Raoult's law. Similarities and differences in raoult's and henry law. Solution:- Solution is a mixture of two or more components Like Solute and Solvents. Solute:- Component of the Solution present in less amount, is known as solute. Solvent:- Component of the solution present in excess amount, is known as Solvent. => According to number of components type of Solution :- Binary solution:- Solution is prepared by two components, is called Binary solution. Tertiary solution:- Solution is prepared by three compo

Poaceae -Graminae Family

What plant is the largest member of the Poaceae family? Which plant belongs to the grass family? What genus is grass? What genus is grass? POACEAE (GRAMINAE) Habitat :- Herb : - Non-cultivated and non-woody stem. Which can be easily broken. Its height is about between 1 to 2 feet. E.g. wheat, rice, maize, etc. Oryza Sativa Shrub: Woody stem, height is about 3-4 feet and having a bush-like appearance. Wheat Tree: Woody stem which is hard and can’t easily broke it and large in size. E.g. bamboo Bamboo Annual : Those plant which can live in one year to complete its life cycle in one year either seed germination and flowering. E.g. wheat, maize, etc. Biennial : Those plant which can complete its life cycle in two years.

Classification of Angiosperms Flowering plants

Classification of Angiosperms :-The Flowering Plants Monocots :- Single cotyledon Parallel veins Flowers in multiples of 3’s Dicots :- Two cotyledons Netted veins Flowers in multiples of 2, 4, or 5. MONOCOT-PLANT Dicot plant FRUITS :- SIMPLE Dry (poppy seed, milkweed, wheat) Fleshy (peach, plum, apple, tomato, grape). AGGREGATE Flowers with several carpels Raspberry, strawberry. MULTIPLE Cluster of flowers Pineapple. SIMPLE.AGGREGATED AND MULTIPLE FRUITS SEED STRUCTURES :- Micropyle Opening through which the pollen tube grows to deliver pollen to the ovary (ovules).

Corona Virus -COVID-19

Corona Virus History and origin of Corona virus :- First human corona virus characterised in 1960 ,later in 2003;5 more human infected corona virus identified including the severe acute respiratory infection corona virus .NL63 is newly identified group of corona virus which include Nl and the haven corona virus . these viruses are associated with lower and upper respiratory tract and cause respiratory infections. Corona is a group of viruses that causes disease in Mammals and birds .Some basic examples of corona virus is Common cold virus(Rhinovirus) but some examples are very dangerous or may be lethal :SARS,COVID-19,MERS and etc.SARS-COV firstly identified in 2003 and SARS-COV 2 idetified in 2019 Newly discovered Corona virus . Structure of corona virus :- Corona virus is plriomorphic virus spherical with bulbulous projection mainly it consist a lipid bilayer Membrane M,spike S,envelope E,and structural pr

Carboxylic Acids-Chemical Properties - Esterification

Carboxylic Acids-Chemical Properties - Esterification Carboxylic Acid Chemical Properties of Carboxylic Acids:- Esterification :- When alcohols or phenols react with carboxylic acids then esters are formed in the presence of concentration. H2SO4 or HCl as a catalyst. Carboxylic Acids-Chemical Properties Esterification Reaction with PCl5, SOCl2:- When the hydroxyl group of the carboxylic acid is easily replaced by chlorine atom when it is treated by (PCl_5), (SOCl_2) as the products which are produced are gaseous in nature and can escape from the reaction mixture making the purification easier. Reaction with PCl5 Reduction:- With diborane, NaBH4, and lithium aluminum hydride, carboxylic acids are reduced to primary alcohols. Reduction Carboxylation:- Carboxylic acids lose carbon dioxide to form hydrocarbons when their sodium salts are heated with soda-lime and this the reaction is called decarboxylation. Carboxylation Halogen

Frog-Digestion II ingestion II B.sc NotesII Class 11th notes

Frog-Digestion Digestion:- Mouth:- It is wide open bounded by the upper and lower jaw. Buccopharyngeal cavity: - The mouth leads into the buccal cavity that consists of Teeth:- Only the upper jaw contains teeth. All similar Homodont, Acrodont -not completely attached with bone, Crown, and base two-part present. Crown is formed by Dentine covered by Enamel. The tooth has a pupil cavity with Pulp. Mainly two types of teeth present -Maxillary and vomerine. Internal nares:- The pair of opening presents near the vomerine teeth. Bulging eyeballs:- These two large oval areas on the roof of the buccal cavity. Pharynx:- The pharynx consists of a Eustachian tube over the roof of it. It connects the pharynx with the middle ear. Vocal sac:- Opening of vocal sac present at the angle of the jaw which is present only in male frog during breeding season help in copulation. Tongue:- Tongue lies on the floor of the buccal c