Ask questions which are clear, concise and easy to understand.
Ask QuestionPosted by Ajit Singh 6 years, 3 months ago
- 2 answers
Aniket Sarve 6 years, 3 months ago
An important point to be noted here is that a rainbow is always formed in a direction opposite ti that if the Sun.
Hope it Help's
Posted by Ajish Khan 6 years, 3 months ago
- 1 answers
Meghna Thapar 6 years ago
Cleaning action of soap has been explained with the help of the image below. Soaps are molecules in which the two ends have differing properties, one is hydrophilic, that is it dissolves in water, while the other end is hydrophobic, that is it dissolves in hydrocarbons. When soap is at the surface of water the hydrophobic ‘tail’ of soap will not be soluble in water and the soap will align along the surface of water with the ionic end in water and the hydrocarbon ‘tail’ protruding out of water. Inside water, these molecules have a unique orientation that keeps the hydrocarbon portion out of the water. This is achieved by forming clusters of molecules in which the hydrophobic tails are in the interior of the cluster and the ionic ends are on the surface of the cluster. This formation is called a micelle. Soap in the form of a micelle is able to clean, since the oily dirt will be collected in the centre of the micelle. The micelles are large enough to scatter light. Hence a soap solution appears cloudy.
Posted by Chahat Mehta 6 years, 3 months ago
- 5 answers
Student Lyf ? 6 years, 3 months ago
Kumkum Sarswat 6 years, 3 months ago
Eshita Saha 6 years, 3 months ago
Abhinav ? 6 years, 3 months ago
Posted by Mahendra Choudhary 6 years, 3 months ago
- 2 answers
Kumkum Sarswat 6 years, 3 months ago
Posted by Prabha Gala 6 years, 3 months ago
- 2 answers
Yogita Ingle 6 years, 3 months ago
Monohybrid cross is a cross between parents differing in only one trait or in which only one trait is being considered.
Dihybrid cross is a cross between parents in which two pairs of contrasting characters are studied simultaneously for the inheritance pattern.
Abhinav ? 6 years, 3 months ago
Posted by Rakesh Chaubey 6 years, 3 months ago
- 2 answers
Kumkum Sarswat 6 years, 3 months ago
Yogita Ingle 6 years, 3 months ago
Modern periodic law states that “Properties of elements are a periodic function of their atomic number”.
(i) There are 18 groups in the modern periodic table and
(ii) 7 periods in the modern periodic table.
Posted by Amarnath Singh 6 years, 3 months ago
- 4 answers
Kumkum Sarswat 6 years, 3 months ago
Yogita Ingle 6 years, 3 months ago
Amphoteric nature means showing both acidic and basic nature.
Acidic nature( Reaction with alkalis)
2Al (s) + 2NaOH(aq) + 6H2O(l) 
2 Na+ [Al(OH)4] –(aq) + 3H2(g)
Basic nature(Reaction with acids)
2Al(s) + 6HCl (aq) → 2Al3+ (aq) + 6Cl– (aq) + 3H2 (g)
Rakesh Chaubey 6 years, 3 months ago
Posted by Dali Sahu 6 years, 3 months ago
- 1 answers
Yogita Ingle 6 years, 3 months ago
Electromagnetic Induction is a current produced because of voltage production (electromotive force) due to a changing magnetic field.
The electromotive force generated due to electromagnetic induction is called induced emf. The current due to induced emf is called induced current.
Posted by Dali Sahu 6 years, 3 months ago
- 3 answers
Khushi Kumari 6 years, 3 months ago
Yogita Ingle 6 years, 3 months ago
| AC can carry and safe to transfer longer distance even between two cities, and maintain the electric power. | DC cannot travel for a very long distance. It does, it loses electric power. |
| The rotating magnets cause the change in direction of electric flow. | The steady magnetism makes DC flow in a single direction. |
| The frequency of AC is depended upon the country. But, generally, the frequency is 50Hz or 60Hz. | DC has no frequency of zero frequency. |
| In AC the flow of current changes its direction backwards periodically. | It flows in a single direction steadily. |
| Electrons in AC keep changing its directions – backward and forward | Electrons only move in one direction – that is forward. |
Sonam Tiwari 6 years, 3 months ago
Posted by Dali Sahu 6 years, 3 months ago
- 3 answers
Ayush Chaubey 6 years, 3 months ago
Khushi Kumari 6 years, 3 months ago
Yogita Ingle 6 years, 3 months ago
In an electric generator mechanical energy is used to rotate a conductor in a magnetic field to produce electricity.
Fleming’s right hand rule is used where motion and magnetic field is given and the current is induced.
Posted by Dali Sahu 6 years, 3 months ago
- 2 answers
Khushi Kumari 6 years, 3 months ago
Yogita Ingle 6 years, 3 months ago
A fuse is a thin wire made of a material which have low melting point so that it melts and breaks off the circuit if the current exceeds the safety limit. A copper wire cannot be used as a fuse wire because it has a high melting point. It will not melt easily when a high electric current passes through it and may damage the electrical appliances.
Posted by Dali Sahu 6 years, 3 months ago
- 1 answers
Yogita Ingle 6 years, 3 months ago
Two hazards associated with the use of electricity are:
i. If a person happens to touch a live electric wire, he gets a severe electric shock.
ii. Short-circuiting due to damanged wiring or overloading of the circuit can cause electrical fire in a building.
Posted by Ayush Chaubey 6 years, 3 months ago
- 2 answers
Rakesh Chaubey 6 years, 3 months ago
Yogita Ingle 6 years, 3 months ago
{tex}CaCO_3\rightarrow CaO+CO_2{/tex}
Light: {tex}2AgCl(s)\rightarrow 2Ag(s)+Cl_2(g){/tex}
Electricity: {tex}2H_2O\rightarrow 2H_2+O_2{/tex}
Explanation:
Decomposition reaction is a chemical reaction in which one reactant is converted to two or more than two products. The breaking of bonds require absorption of energy and thus all decomposition reactions are endothermic in nature.
Thermal decomposition is decomposition carried by using heat, Photo decomposition is decomposition carried by using light and Electrolytic decomposition is decomposition carried by using electricity.
Posted by ? Queen ? 6 years, 3 months ago
- 1 answers
Ankesh ..Now I Am Fully Ready?? 6 years, 3 months ago
Posted by Ishan Bhagat 6 years, 3 months ago
- 0 answers
Posted by Pulkit Jain 6 years, 3 months ago
- 2 answers
Posted by ? Queen ? 6 years, 3 months ago
- 4 answers
Posted by Muskan Johri 6 years, 3 months ago
- 0 answers
Posted by Komal Chaudhary 6 years, 3 months ago
- 3 answers
Yogita Ingle 6 years, 3 months ago
The electric generator works on the principle that when a conductor is moved in a magnetic field then the current is induced in the conductor or in other words electricity can be generated by rotating a coil inside magnetic field.
Aadya Singh ? 6 years, 3 months ago
Posted by ? Queen ? 6 years, 3 months ago
- 2 answers
Yogita Ingle 6 years, 3 months ago
Esters are sweet smelling compounds.
They are formed by the reaction of a carboxylic acid with an alcohol in the presence of conc. sulphuric acid.
For example, ethyl ethanoate is prepared by reacting ethanoic acid and ethanol in the presence of conc.sulphuric acid.
Aadya Singh ? 6 years, 3 months ago
Posted by Ubaid Khan 6 years, 3 months ago
- 4 answers
Posted by Anwesha Boruah 6 years, 3 months ago
- 2 answers
Yogita Ingle 6 years, 3 months ago
There are two ways of estimating the age of fossils:
i) First is the relative method. If we dig into the earth and start finding fossils, it is reasonable to suppose that the fossils we find closer to the surface are more recent than the fossils we find in deeper layers.
ii) The second way of dating fossils is by detecting the ratios of different isotopes of the same element in the fossil material .
Posted by Jahnvi Sharma 6 years, 3 months ago
- 0 answers
Posted by Akhil Uday 6 years, 3 months ago
- 1 answers
Yash Gitoria 6 years, 3 months ago
Posted by Alashad Khan 6 years, 3 months ago
- 1 answers
Yogita Ingle 6 years, 3 months ago
- This is a type of asexual reproduction in which two daughter cells (or two individuals) are formed from a single parent.
- Parent cell becomes elongated.
- Nucleus divides first and then the cytoplasm divides.
- At the point of fission, constriction appears and deepens to divide the cell into two daughter cells.
Posted by Saniya Saneja 6 years, 3 months ago
- 1 answers
Meghna Thapar 6 years ago
Magnalium is an aluminium alloy with 5% magnesium and 95% aluminum.
Duralumin is an alloy of copper, manganese and magnesium.
Posted by Puneet Singh 6 years, 3 months ago
- 2 answers
Star Always 6 years, 3 months ago
Posted by Somlata Patail 6 years, 3 months ago
- 0 answers
Posted by Khushboo Patel 6 years, 3 months ago
- 1 answers
Posted by Paras Jain 6 years, 3 months ago
- 1 answers
Gaurav Seth 6 years, 3 months ago
when we take oxygen show the nasal cavity. then the oxygen goes to the alveoli that is sac like structure present in the lungs. Here by the process of diffusion exchange of gases between the blood and the alveoli takes place.
Then the blood goes to the heart.And heart pumps that pure blood to the other part of the body or the targeted site.
When the blood goes to the site or the tissues. Then again the process of diffusion takes place for the exchange of the gases (Oxygen and Carbon dioxide).
In the blood there is high concentration of oxygen then the tissue. On other hand, in tissue there is high concentration of carbon dioxide than the blood. Hence by the diffusion the exchange of gases takes place.
In the blood where high concentration of carbon dioxide present goes to the heart. Heart pumps the blood to the lungs for purification. This pathway continuous goes on.
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
Kumkum Sarswat 6 years, 3 months ago
1Thank You