CBSE Quick Revision Notes CBSE Class-11 BiologyCHAPTER-07STRUCTURAL ORGANIZATION IN ANIMALS In multicellular organism a group of similar cells along with intercellular substances perform a specific function. Such organization is called tissue. Epithelial Tissue: This tissue provides covering or lining for some part…Read More »
CBSE Class 11 Biology NCERT SolutionsChapter 07Structural organization in animals 1. Answer in one word or one line.(i) Give the common name of Periplaneta americana.(ii) How many spermathecae are found in earthworm?(iii) What is the position of ovaries in the cockroach?(iv) How…Read More »
CBSE TEST PAPER 01 CLASS XI CHEMISTRY(Redox Reactions) General Instruction: All questions are compulsory. Marks are given alongwith their questions. 1. Define oxidation reaction? [1] 2. Define reduction reaction? [1] 3. In the reactions given below, identify the species undergoing oxidation and…Read More »
CBSE Class 11 Chemistry Quick Revision NotesChapter 9Hydrogen Hydrogen-occurrence, Isotopes, Preparation, Properties and uses Hydrides-ionic covalent and interstitial Physical and Chemical Properties of water Hydrogen peroxide Hydrogen as a fuel Occurrence: It is the most abundant element in the universe. It is…Read More »
CBSE Class 11 Chemistry NCERT SolutionsChapter 9Hydrogen 1. Justify the position of hydrogen in the periodic table on the basis of its electronic configuration. Ans. Hydrogen is the first element of the periodic table. Its electronic configuration is []. Due to the presence…Read More »
CBSE TEST PAPER 01 CLASS XI CHEMISTRY(Hydrogen) General Instruction: All questions are compulsory. Marks are given along with their questions. 1. Which isotope of hydrogen (i) does not contain neutron? (ii) is radioactive? [1] 2. Give the electronic configuration of hydrogen. [1]…Read More »
CBSE Class 11 Chemistry Quick Revision NotesChapter 10The s-Block Elements Group 1 Elements: Alkali Metals Some Important Compounds of Sodium Biological Importance of Sodium and Potassium Group 2 Elements : Alkaline Earth Metals Some Important Compounds of Calcium Biological Importance of Magnesium…Read More »
CBSE Class 11 Chemistry NCERT SolutionsChapter 10The s block elements 1. What are the common physical and chemical features of alkali metals? Ans. Physical properties of alkali metalsare as follows. (1) They are quite soft and can be cut easily. Sodium metal can be…Read More »
CBSE TEST PAPER 01 CLASS XI CHEMISTRY (The s-Block Elements) General Instruction: All questions are compulsory. Marks are given along with their questions. 1. Why is Group I elements known as the most electropositive element? [1] 2. Why is lithium salts mostly…Read More »
CBSE Class 12 Chemistry Quick Revision Notes Chapter 7 The P-Block Elements The p-Block elements: Elements belonging to groups 13 to 18 of the periodic table are called p-block elements. General electronic configuration of p-block elements: The p-block elements are characterized by the ns2np1-6…Read More »
