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Ask QuestionPosted by Shreyansh Sutariya 3 years, 11 months ago
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Yogita Ingle 3 years, 11 months ago
It is the ability of an atom to gain or lose electron in order to achieve the noble gas configuration. It refers to the ability of an element to combine with other element. It is obtained by determining the number of electrons in the outermost shell (also called valence shell) of each atom of an element. For instance, sodium has 1 electron in its outermost shell and hence valency of sodium is 1.
Posted by Abhinandan Dubey 3 years, 11 months ago
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M U 3 years, 11 months ago
Gaurav Seth 3 years, 11 months ago
There are three states of matter – solid, liquid and gas.
- Solid: Matters which have fixed volume and shape are called solids. ...
- Liquid: Matters which have fixed volume but indefinite shape are called liquids. ...
- Gas: Matters which have indefinite shape and volume are called gases.
Posted by Abhinandan Dubey 3 years, 11 months ago
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Dhruv Kumar Jha 3 years, 11 months ago
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Krupal Sonkusare 3 years, 11 months ago
Krishna Gunwant 3 years, 11 months ago
Aastha Tiwari ? 3 years, 11 months ago
Posted by Abhinandan Dubey 3 years, 11 months ago
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Darshan Kalita 3 years, 11 months ago
Aastha Tiwari ? 3 years, 11 months ago
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Abhinandan Dubey 3 years, 11 months ago
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Rut@J@ $Ingh 3 years, 11 months ago
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Yogita Ingle 3 years, 11 months ago
Mass of the Body = 10 kg.
Height = 5 m.
Acceleration due to gravity = 9.8 m/s².
Using the Formula,Potential Energy = mgh
= 10 × 9.8 × 5 = 98 × 5 = 490 J.
Posted by Vaishnavi Alvala 3 years, 11 months ago
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Nandini Ladda 3 years, 11 months ago
Posted by Pankhi Sharma 3 years, 11 months ago
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Yogita Ingle 3 years, 11 months ago
Atomicity
The number of atoms present in a single molecule is termed as its atomicity. It can be classified into three types.
- The molecules of many elements are composed of only a single atom of that element. They are termed as monoatomic. For instance, Ar (Argon), He(Helium). So their atomicity is one.
- On the other hand the molecules of many elements are composed of two atoms of that element. For instance, oxygen can never exist independently and exist as O2 molecule known as diatomic So its atomicity is 2.
- The molecules of many elements are composed of three atoms of that element. They are termed as triatomic For instance, O3, CO2. So their atomicity is 3.
- The molecules of many elements are composed of four atoms of that element. They are termed as tetra atomic For instance, P4, SO3. So their atomicity is 4.
Posted by Varsha Kanwar 3 years, 11 months ago
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Yogita Ingle 3 years, 11 months ago
Mass is given as 32gms
Volume is 200ml
M/v %is m/v x 100
32/200 x 100
= 18
Posted by Kanish Krishna J. P 3 years, 11 months ago
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Nandini Ladda 3 years, 11 months ago
Gaurav Seth 3 years, 11 months ago
Vector
Velocity is physical vector quantity ;both magnitude and direction are needed to define it .the scalar absolute value of velocity is called speed ,being a coherent DERIVED unit whose quantity is measured SI as metre per second or as the SI base unit of (m⋅s−1)
Posted by Meera Boghani 3 years, 11 months ago
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Yogita Ingle 3 years, 11 months ago
If the formula of a chloride of a metal M is MCl3, then the formula of the phosphate of metal M will be MPO4.
Since, the formula of a chloride of a metal M is MCl3, the metal is trivalent (because chlorine is monovalent). Phosphate is trivalent. Hence, one M3+ ion will combine with one PO43− ion to maintain electrical neutrality.
Posted by Nitin Hemant 3 years, 11 months ago
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Yogita Ingle 3 years, 11 months ago
Prokaryotes lack a defined nucleus (which is where DNA and RNA are stored in eukaryotic cells), mitochondria, ER, golgi apparatus, and other membrane bound organelles. In addition to the lack of organelles, prokaryotic cells also lack a cytoskeleton.
Posted by Meera Boghani 3 years, 11 months ago
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Gaurav Seth 3 years, 11 months ago
MPO4
Valency of chlorine is -1 hence valence of metal in the given compound MCl3 is +3. Valency of phosphate ion is PO43−. By cross multiplication method, formula of the given compound is MPO4, as valency of both is same they combine in unit ratio.
Posted by Durgabhavani Kodakandla 3 years, 11 months ago
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Gaurav Seth 3 years, 11 months ago
Inertia is the tendency of an object to resist changes in its state of motion.
The state of motion of an object is defined by its velocity - the speed with a direction. Thus, inertia could be redefined as follows: Inertia: tendency of an object to resist changes in its velocity. An object at rest has zero velocity - and (in the absence of an unbalanced force) will remain with a zero velocity. Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force. An object in motion with a velocity of 2 m/s, East will (in the absence of an unbalanced force) remain in motion with a velocity of 2 m/s, East. Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force. Objects resist changes in their velocity.
Posted by Darminder Badyal 3 years, 11 months ago
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Gayathri M 3 years, 11 months ago
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Gaurav Seth 3 years, 11 months ago
Vector
Displacement is the shortest distance from the initial to the final position of a point P. Thus, it is the length of an imaginary straight path, typically distinct from the path actually traveled by P. So displacement has both the magnitude as well as direction. So it is a vector.
Posted by Abhinandan Dubey 3 years, 11 months ago
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Gaurav Seth 3 years, 11 months ago
Asexual reproduction is a mode of reproduction in which the new offspring arise from a single parent. The offsprings are identical to each other, both physically as well as genetically. They are the exact copies of their parent cell.
Organisms choose to reproduce asexually by different means. Some of the asexual methods are binary fission (e.g. Amoeba, bacteria), budding (e.g. Hydra), fragmentation (e.g. Planaria), spore formation (e.g. ferns) and vegetative propagation (e.g. Onion).
Posted by Abhinandan Dubey 3 years, 11 months ago
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Posted by Abhinandan Dubey 3 years, 11 months ago
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Gaurav Seth 3 years, 11 months ago
Biomolecules are the molecules present in a living organism. These biomolecules are fundamental building blocks of living organisms as they support the biological processes essential for life. Eg carbohydrates, proteins, nucleic acids, lipids, vitamins, etc. Carbohydrates are involved in energy storage; the hormones catalyze the biochemical reactions; DNA/RNA store/transmit the genetic codes of a living being.
Biomolecules are the most essential organic molecules, which are involved in the maintenance and metabolic processes of living organisms. These non-living molecules are the actual foot-soldiers of the battle of sustenance of life. They range from small molecules such as primary and secondary metabolites and hormones to large macromolecules like proteins, nucleic acids, carbohydrates, lipids etc.
There are four major classes of Biomolecules – Carbohydrates, Proteins, Nucleic acids and Lipids.
Posted by Abhinandan Dubey 3 years, 11 months ago
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Gaurav Seth 3 years, 11 months ago
tructure of flame
A flame consist of three zones.These are Innermost zone,middle zone,outer zone.The three zones of a flame have different colours and different temperature.
1) The Innermost zone of a flame is dark or black:It consist of hot,unburnt vapours of the combustible material.It is the least hot part of the flame.It is the coldest part of the flame.
2)The middle zone of a flame is yellow:It is bright and luminous.The fuel vapours burn partially in the middle zone because there is not enough air of burning in this zone.The partial burning of fuel in the middle zone produces carbon particles.These carbon particles then leave the flame as smoke and soot.It has moderate temperature.
3)The outer zone of a flame is blue:It is a non-luminous zone.In this zone,complete combustion of the fuel takes place because there is plenty of air around it.The outermost zone has the highest temperature in the flame.It is the hottest part of the flame.It is quite thin as compared to middle zone.
Posted by Khushbu Pandit 3 years, 11 months ago
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Gaurav Seth 3 years, 11 months ago
Brownian movement or motion is zigzag, random movement of microscopic particles suspended in a liquid or gas, caused by collisions between these particles and the molecules of the liquid or gas.
One of the most common examples of Brownian motion is diffusion. Cases, where pollutants are diffused in air or calcium diffused in bones can be considered examples of this effect.
Posted by Mohamed Shaheedh 3 years, 11 months ago
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Samruddhi Khonde 3 years, 11 months ago
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Yogita Ingle 3 years, 11 months ago
A cell performs these major functions essential for the growth and development of an organism. Important functions of cell are as follows:
Provides Support and Structure
All the organisms are made up of cells. They form the structural basis of all the organisms. The cell wall and the cell membrane are the main components that function to provide support and structure to the organism. For eg., the skin is made up of a large number of cells. Xylem present in the vascular plants is made of cells that provide structural support to the plants.
Facilitate Growth Mitosis
In the process of mitosis, the parent cell divides into the daughter cells. Thus, the cells multiply and facilitate the growth in an organism.
Allows Transport of Substances
Various nutrients are imported by the cells to carry out various chemical processes going on inside the cells. The waste produced by the chemical processes is eliminated from the cells by active and passive transport. Small molecules such as oxygen, carbon dioxide, and ethanol diffuse across the cell membrane along the concentration gradient. This is known as passive transport. The larger molecules diffuse across the cell membrane through active transport where the cells require a lot of energy to transport the substances.
Energy Production
Cells require energy to carry out various chemical processes. This energy is produced by the cells through a process called photosynthesis in plants and respiration in animals.
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Gaurav Seth 3 years, 11 months ago
Means of spread of Infectious disease
1)Air-borne diseases:Microbial agents can move from an affected person to someone else through air.
It occurs through the little droplets thrown out by an infected person who sneezes or coughs.
Someone standing close by can breathe in these droplets, and microbes get chance to start a new infection.
For Example :Common cold, pneumonia, tuberculosis
2)Water-borne diseases:They can be spread through water.
If the excreta from someone suffering from an infectious gut disease such as cholers or amoebiasis gets mixed with drinking water used by people living nearby.
The cholera infected bacteria will enter new hosts through the water they drink and cause disease.
3)Sexually Transmitted diseases(Syphilis,AIDS):These diseases are transmitted by sexual contact from one partner to other.However these diseases are not transmitted by causal physical contact.
AIDS virus can also spread through blood to blood contact with infected people or infected mother to her baby during pregnancy or breast feeding.
4)Through vectors:Vectors are carrier of a disease or infection.
Many animals which live with us may carry disease.These animals carry infecting agents from a sick person to another host.
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