TAMILNADU COMPETITIVE EXAMS

Hi guys.This is my new post on living world.If you haven't read the previous ones,use the links mentioned below Click here to  read living world Part 1 Click here to  read living world Part 2 In this article,we will see in detail about the topic 'living world' beyond NCERT limits.To read the brief notes on NCERT limits,click on the above mentioned links •Growth can be of two types Intussusception -addition of materials inside the body Accretion -addition of materials on the outside Substances added can also be of two types Protoplasmic substances -components of living matter Apoplamic substances -non living materials Growth cannot be a defining character for living •Metabolism can be of two types Catabolism -breaking down,release energy Eg:Respiration Anabolism -building up,consume energy Eg:Photosynthesis Metabolism can be considered as a defining character   Some important binomial names Allium cepa - Onion Triticum ...

Hi guys,I will post the questions and answer is given at the end of this post.If you have not read the notes,click on the below link To read,  Living world-Part 1,click here To read,  Living World-Part 2,click here To read, Living world-BEYOND NCERT,click here To view NCERT BOOK pdf, click here to view the pdf 1.As we go from species to kingdom in a taxonomic hierarchy, the number of common characteristics a)   will decrease b)  will increase c)  remain same d)  may increase or decrease 2.Which of the following ‘suffixes’ used for units of classification in plants indicates a taxonomic category of ‘family’. a)  - ales b)  - onae c)  - aceae d)  - ae 3.The term ‘systematics’ refers to: a)   Identification and classification of plants and animals b)   Nomenclature and identification of plants and animals c)   Diversity of kinds of organisms and their relationship d)  ...

Hi guys,let's continue.If you have not read the Part 1  click here to read Part 1 To see the NCERT book , click here to view NCERT book for this lesson Taxonomic categories:  The category is a part of overall taxonomic arrangement and it is called the taxonomic category and all categories together constitute the taxonomic hierarchy. Each category, referred to as a unit of classification, in fact, represents a rank and is commonly termed as taxon (pl.: taxa). Remember, groups represent category. Category further denotes rank. Each rank or taxon, in fact, represents a unit of classification. These taxonomic groups/ categories are distinct biological entities and not merely morphological aggregates. The taxonomic categories are This can be remembered with the clue ' King Play Cards on Flat Green Stool  ' The points you must remember are from species to kingdom(ascending order)- specificity/common character decreases from species to kingdom(ascending or...

Hi guys.Let's start with THE LIVING WORLD. In this article,I will share some important concepts in Living world within NCERT Limits. What is LIVING? When we try to define ‘living’, we conventionally look for distinctive characteristics exhibited by living organisms. Growth, reproduction, ability to sense environment and mount a suitable response come to our mind immediately as unique features of living organisms All living organisms grow. Increase in mass and increase in number of individuals are twin characteristics of growth . In plants,this growth occurs continuously where as it is limited by certain checks in animals. However, cell division occurs in certain tissues to replace lost cells.But, unicellular organisms multiply by cell division. Even non-living things like sand mounds,mountains and boulders grow.So, it cannot be considered as a defining character for living Reproduction refers to the production of progeny possessing features more or less si...

UNIT 1:DIVERSITY IN LIVING WORLD LESSON 1 : The Living World : Book--> Click here : Living world ncert book Exemplar--> Click here :  Living world-Ncert exemplar                                                 

Important Notes Human Health & Diseases: Diseases caused by Protozoa 1. Malaria Malaria is a life-threatening disease that’s typically transmitted through the bite of an infected Anopheles mosquito affecting humans and other animals caused by parasitic protozoan belonging to the Plasmodium type. There are four species of Plasmodium which causes four main types of malaria in human are:  Plasmodium falciparum (Malignant tertian malaria) Plasmodium malariae (Quartian malaria) Plasmodium vivax (Benign tertian malaria) Plasmodium ovate (Mild tertian malaria) Life Cycle of Plasmodium: The natural ecology of malaria involves malaria parasites infecting successively two types of hosts: humans and female  Anopheles  mosquitoes. In humans, the parasites grow and multiply first in the liver cells and then in the red cells of the blood. In the blood, successive broods of parasites grow inside the red cells and destroy them, releasing daughter parasites ...

Useful Tips for NEET Preparation and Examination Tips and Tricks for Preparation  You have to first decide your goal. If you are aiming for just selection, then you should score in the following manner  Biology- 320 marks (M.M. – 360 Marks)  Chemistry- 150 marks (M.M. – 180 Marks)  Physics - 70 to 90 marks (M.M. – 180 Marks)  Total - 540-560 marks out of 720 Marks.  But if you are aiming a high rank, obviously you have to score more than 135 marks in physics as  well.  Always start attempting the examination paper with Biology , followed by chemistry and finally physics.  You should be thorough with NCERT books. Every year around 75% questions are directly from NCERTs.  The weightage is more on class 11th syllabus.  Focus more on bold words, Graphs (curves), reactions, diagrams and their captions, tables and other illustrations.  Always revise a particular chapter (theory) and then start attempting the questions based on that. This way ...

How to solve Physics Problems in NEET In this article, we are sharing the most important things required while solving any numerical based problem. As we know, Physics has always been considered to be the most complicated subject. Physics, especially for NEET requires a very keen conceptual approach along with basic theoretical knowledge to the problems. Moreover, there are many derivations and Formulae which requires a good level of Mathematical approach to get to the final result or answers. In order to crack the questions and scoring good marks in physics, a proper strategy and planning are required. In this article, we emphasize that how the student should ride the ladder from the basic Physics to the Complex topics which will be useful from the examinations point of view!! For chemistry tricks,please see in the below link!! See tricks to solve inorganic chemistry 1. Stay Calm, No need to Panic I know it would be easy in words but it's tough to follow. Usuall...

TIPS TO CRACK SHAPE OF THE MOLECULE: Are you feeling dejected in solving shapes of the chemical molecules? Then this article might help you But now the problem is how to find lone pair and bond pair... That is the next technique TRICK TO FIND L.P, B.P AND HYBRIDISATION Let's consider NH 3   as an example now. First find the central atom which had undergone hybridisation and find its outershell electrons and write as below:                 N •               •               •               •               • ( Nitrogen has 5 elecrons in its outermost shell and so five dots) Now three hybrogens are bonded to it.So write as below             N •─H               •...

Important notes on Preparation and Properties of K 2 Cr 2 O 7 In this article we are providing the keynotes to cover the one of the important compounds from the topic: Properties of D and F block elements in just 10 points. In the previous article we discussed about the Physical properties of D-block elements (A) Potassium dichromate (K 2 Cr 2 O 7 ):  1. It is an inorganic chemical reagent and is used as an oxidizing agent in various health and industry-related problems (mainly used to oxidize alcohols 2. It is acutely and chronically harmful to health. 3. It is a crystalline ionic solid with a very bright, red-orange color and is moderately soluble in cold water but freely soluble in hot water. 4. It has a triclinic geometry with a tetrahedral coordination geometry. 5. Preparation: It is prepared from chromite ore (FeCr2O4). This preparation involves many steps: i. Preparation of Sodium Chromate Chromite ore is finely powdered and is he...

Physical Properties of D block elements Per iodic table 1. The d-block elements are also called as Transition elements. And the f-block elements are called as the inner-transition elements.  2. The d-block elements are found in the groups 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 of the periodic table. There is a special name given to the period 6 and 7 called as Lanthanide and Actinide series  3. These are called d-block elements, because there last electron enters the d-shell. The number of valence electrons is a d-sub shell are 10. 4. There are mainly four series namely :3d series (Ist series) - From Sc to Zn : 4d series (IInd series) - From Y to Cd : 5d series (IIIrd series) - From La to Hg (excluding Ce to Lu) : 6d series (IVth series) - Starting from Ac 5. The electronic configuration of d-block elements is (n-1)d ns . The (n–1) stands for the inner d orbitals which may have one to ten electrons and the outermost ns orbital may have one or two electrons. ...

TRICKS FOR MAKING INORGANIC CHEMISTRY  LOVABLE 1. Just learn the word LERCMBS DORI . 2. You just remember the place of dotes because they are separated according to the different properties of groups as there is no dot present between CM you can see in 4 point the property CATENATION  and METAL METAL BOND ENERGY both properties for 4 Similarly is the case with DORI as this word represent Dipole moment, Oxidizing strength, Reactivity toward hydrogen, Ionic nature L .E.R.CM.B.S. DORI 1. L - Lattice energy of  metal halides = 1 group 2. Enthalpy of hydration = 2 group 3. Relative stability of +3 oxidation state in 3 group 4. Catenation property , metal metal bond energy = 4 group 5. Basicity of hydride = 5 group 6. Stability of halide = 6 group 7. Dipole moment Oxidizing strength Reactivity toward hydrogen Ionic nature All properties increase from top to bottom except these 2. TRICKS TO ESTIMATE THE PRODUCTS FORM WHEN COMPOUND IS HEATED Maximum time w...