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Class 4 NCERT Solutions, Books, Syllabus & Study Materials

Download free Class 4 chapter-wise NCERT solutions, textbook answers, sample question papers, syllabus, and study notes.

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State Board K-12 (All Classes) Study Guide

Chemical and Ionic Equilibrium

Equilibrium Equilibrium is the state of a process in which the properties like temperature, pressure, and concentration etc of the system do not show any change with passage of time. => In all...

State Board Senior Secondary (12th) Study Guide

Conversions in Organic Chemistry

=> Haloalkanes can give you every possible functional group. They can also help you in increasing the chain size. So you might want to convert your starting material to haloalkanes and then go to...

State Board K-12 (All Classes) Study Guide

Microbes in human welfare

1.curd also known as lactobacillus or lactic acid bacteria(LAB) with high nutritional quality by increasing vitamin B12. 2.large holes in Swiss cheese are due to production of a large amount of CO2...

State Board Secondary (10th) Study Guide

An Ovum surrounded by Sperms

(ii) Penetration of sperm: => (a) The ovum secretes a chemical substance called fertilizin, which has a number of spermophillic sites on its surface where the sperm of species specific type can be...

State Board K-12 (All Classes) Study Guide

Chemical and Ionic Equilibrium

Equilibrium Equilibrium is the state of a process in which the properties like temperature, pressure, and concentration etc of the system do not show any change with passage of time. => In all...

State Board K-12 (All Classes) Study Guide

Genetic Terminology

▪️ Allele :- An alternative form of a gene ▪️ morph :- A silent gene ▪️ Angelman syndrome :- a rare genetically inherited form of mental retardation ▪️ Autosome :- Synonymous with somatic chromosomes...

State Board K-12 (All Classes) Study Guide

Lipids

(2) These are esters of fatty acids and alcohol. (1) Term lipid was coined by Bloor. (3) They are hydrophobic insoluble in water but soluble in benzene, ether and chloroform. (4) Lipids are...

State Board K-12 (All Classes) Study Guide

??????????? ????????

(i) ????????? or ????????? ??????????? by which atmospheric air is drawn in and ??? rich alveolar air is ???????? ???. (ii) ????????? of ????? (O2 and CO2) across ???????? ????????. (iii) ?????????...

State Board K-12 (All Classes) Study Guide

Archaebacteria

(Archae-ancient; bacteria) are special since, they live in some of the most harsh habitats such as extreme salty areas (halophiles), hot springs (thermoacidophiles) and marshy areas (methanogens)....

State Board K-12 (All Classes) Study Guide

Human Brain

Introduction => The brain of a human being is the central organ of the nervous system. => The human brain consists of three parts namely the cerebrum, the brainstem and the cerebellum. => The brain...

State Board K-12 (All Classes) Study Guide

Synthetic Fibres and Plastics

Introduction => The clothes that we wear are made up of fabrics and the fabrics are made from fibers, which is obtained from natural or artificial sources. => The natural source of fibers is cotton,...

State Board K-12 (All Classes) Study Guide

Postulates of kinetic theory of gases

A gas consists of large number of tiny particles called molecules. Volume occupied by gas molecules, is negligible as compared to the total volume of gas. here is continuous rapid random motion of...

State Board K-12 (All Classes) Study Guide

Chemical Coordination and Regulation

Properties of hormones (a) These are secreted by endocrine gland (biogenic in origin). (b) Their secretions is released directly into blood (except local hormones e.g. gastrin). (c) These are carried...

State Board K-12 (All Classes) Study Guide

Animal Tissue

The tissue found in animals have comparatively some different properties than the plant tissue. Types of Animal Tissue Animal Tissues are divided as:− => Epithelial Tissue => Connective Tissue =>...

State Board K-12 (All Classes) Study Guide

Thermal Properties of Matter

Heat:- Heat is the agent which produces in us the sensation of warmth and makes bodies hot. It is form of energy. The part of thermal energy which flows from one body to the other due to temperature...

State Board K-12 (All Classes) Study Guide

Sound Science Notes

Sound plays an important role in our life. It is through sound we know that a period in school is over or if someone is approaching you by just listening to the footsteps. Vibrating objects produce...