Ask questions which are clear, concise and easy to understand.
Ask QuestionPosted by Aditya Jee 5 years, 5 months ago
- 2 answers
Panchadev Yadav 5 years, 5 months ago
Posted by Yash Kumar Sinha Sinha 5 years, 5 months ago
- 1 answers
Khushi Verma Verma 5 years, 5 months ago
Posted by Diviyanshu Yadav 5 years, 5 months ago
- 5 answers
Posted by Iqra Kapasiyawala 5 years, 5 months ago
- 1 answers
Posted by Sahana Pasupathy 5 years, 5 months ago
- 2 answers
Posted by Akshit Masta 5 years, 5 months ago
- 2 answers
Fear Fighter 5 years, 5 months ago
Gagana Shree 5 years, 5 months ago
Posted by Supreet Samal 5 years, 5 months ago
- 2 answers
Shakti Chaturvedi 5 years, 5 months ago
Posted by Skarma Angmo 5 years, 5 months ago
- 1 answers
Posted by Uday Meena 5 years, 5 months ago
- 1 answers
Tanuj Kumar 5 years, 5 months ago
Posted by Tanuj Kumar 5 years, 5 months ago
- 1 answers
Yogita Ingle 5 years, 5 months ago
Celsius and Kelvin are two scales used to measure temperature. Both follow the same unit difference between each scale but with different starting points. The relation between Celsius and Kelvin are as follows-
Celsius to Kelvin
K = D+273
Where,
K is the temperature in Kelvin scale.
D is the temperature in Celsius scale.
Posted by Shoshil S K Singh 5 years, 5 months ago
- 1 answers
Meghna Thapar 5 years, 5 months ago
On the basis of physical state, matter is classified into three categories, such as solid, liquid and gas. Matter basically exists in three physical states and these states are used to classify them in the physical form. Matter is distinguished into solid, liquid or gas by the arrangement of the atoms in the mater. While a chemical property is revealed only by the behavior of a substance in a chemical reaction, a physical property can be observed and measured without changing the composition of a sample. Physical properties include color, pressure, length, and concentration.
Posted by Riya Yadav 5 years, 5 months ago
- 1 answers
Yogita Ingle 5 years, 5 months ago
Chromatography is the technique used for separation of those solutes that dissolve in the same solvent.
To understand how this technique can be used let us perform an activity.
Take a thin strip of filter paper. Draw a line on it using a pencil, approximately 3 cm above the lower edge as shown in figure(a). Put a small drop of ink (water soluble, that is, from a sketch pen or fountain pen) at the centre of the line. Let it dry. Lower the filter paper into a jar/glass/ beaker/test tube containing water so that the drop of ink on the paper is just above the water level, as shown in Fig(b) and leave it undisturbed.
Applications of Chromatography
To separate
• colours in a dye
• pigments from natural colours
• drugs from blood.
Posted by Arvind Kumar 5 years, 5 months ago
- 1 answers
Yogita Ingle 5 years, 5 months ago
Solid
- In solids, particles are tightly or closely packed.
- The gaps between the particles are tiny and hence it is tough to compress them.
- Solid has a fixed shape and volume.
- Due to its rigid nature, particles in solid can only vibrate about their mean position and cannot move.
- Force of attraction between particles is adamant.
- The rate of diffusion in solids is very low.
- An example of solids: solid ice, sugar, rock, wood, etc.
Liquid
- In a liquid state of matter, particles are less tightly packed as compared to solids.
- Liquids take the shape of the container in which they are kept.
- Liquids are difficult to compress as particles have less space between them to move.
- Liquids have fixed volume but no fixed shape.
- The rate of diffusion in liquids is higher than that of solids.
- Force of attraction between the particles is weak than solids.
- Example of a liquid state of matter: water, milk, blood, coffee, etc.
Gas
- In gases, particles are far apart from each other.
- Force of attraction between the particles is negligible and they can move freely.
- Gases have neither a fixed volume nor a fixed shape.
- The gaseous state has the highest compressibility as compared to solids and liquids.
- The rate is diffusion is higher than solids and liquids.
- The kinetic energy of particles is higher than in solids and liquids.
- An example of gases: air, helium, nitrogen, oxygen, carbon dioxide, etc.
Plasma
- Plasma is a not so generally seen form of matter. Plasma consists of particles with extremely high kinetic energy. Electricity is used to ionize noble gases and make glowing signs, which is essentially plasma.
- Superheated forms of plasma are what stars are.
Posted by Prince Yadav 5 years, 5 months ago
- 1 answers
Yogita Ingle 5 years, 5 months ago
The important characteristics of particles of matter are the following:
- The particles of matter are very, very small.
- The particles of matter have space between them.
- The particles of matter are constantly moving.
- The particles of matter attract each other.
Posted by Roopa A S 5 years, 5 months ago
- 1 answers
Yogita Ingle 5 years, 5 months ago
Saturn is very large and is the second largest planet in the Solar System. However, it is made up mostly of gas and is less dense than water. Since it is lighter than water, it can float on water. None of the other planets in our Solar System can do this because they have a higher density than water.
Posted by Khushi Verma Verma 5 years, 5 months ago
- 1 answers
Yogita Ingle 5 years, 5 months ago
Yes, the displacement can be zero if the particle returns to its starting point.
If a body starts from some point, say A, goes in a circle and comes back to point A, then the displacement as defined will be zero. Because the initial and final points will be same and there will be zero distance between them. But in the same case distance will not be zero and will be given by the length of actual path traveled by body.
Hence, displacement can be zero, even if distance covered is non-zero.
Posted by Alok Sharma 5 years, 5 months ago
- 2 answers
Yogita Ingle 5 years, 5 months ago
A matter exists in solid state because of greatest force of attraction between its particles which makes the particles closely packed.
Posted by Lekhana Abburi 5 years, 5 months ago
- 1 answers
Khushi Verma Verma 5 years, 5 months ago
Posted by Navpreet Kaur 5 years, 5 months ago
- 1 answers
Khushi Verma Verma 5 years, 5 months ago
Posted by Mithunswami E Kembhavimath 5 years, 5 months ago
- 1 answers
Yogita Ingle 5 years, 5 months ago
The smell of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close because the kinetic energy of the particles of matter increases with the increase in temperature.
Posted by Anita Chouhan 5 years, 5 months ago
- 2 answers
Jiten Singh 5 years, 5 months ago
Meghna Thapar 5 years, 5 months ago
Air is matter because it is a gas composed mostly of nitrogen, oxygen, and argon, and gases do have mass because they're molecules bouncing around a contained volume (here, the atmosphere). Water vapor, mixed in to some extent with air, is also a gas and therefore has mass.
Posted by Rishika Tiwari 5 years, 5 months ago
- 0 answers
Posted by Kanak Verma 5 years, 5 months ago
- 2 answers
Meghna Thapar 5 years, 5 months ago
The surface of Mars has an orange-reddish color because its soil has iron oxide or rust particles in it. The sky on Mars often appears pink or light orange because the dust in the soil is blown into Mars' thin atmosphere by winds on Mars.
Posted by Tejaswanth .. 5 years, 5 months ago
- 0 answers
Posted by Vanshika Nayak 5 years, 5 months ago
- 2 answers
Rr Rr 5 years, 5 months ago
Posted by Toshi Shan 5 years, 5 months ago
- 1 answers
Ayush Tyagi 5 years, 4 months ago
Posted by Janvi Kalra 5 years, 5 months ago
- 1 answers
Posted by Manish Kumar 5 years, 5 months ago
- 2 answers
Ayush Tyagi 5 years, 4 months ago
Meghna Thapar 5 years, 5 months ago
solids have a definite shape and volume, and can't flow. Because the particles are already packed closely together, solids can't easily be compressed. Because there are lots of particles in a small volume, solids are dense. Powdered solids cannot take the shape of their container. Examples of solids that can be compressed easily are sponge and rasgulla.
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
Praveen Kumar 5 years, 5 months ago
0Thank You