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Ask QuestionPosted by Varsha Tripathi 4 years, 11 months ago
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Kritika Gupta 4 years, 11 months ago
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Apeksha Pawaria 4 years, 11 months ago
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Pk. . 4 years, 11 months ago
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Sadul Sharma 4 years, 11 months ago
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Apeksha Pawaria 4 years, 11 months ago
Yogita Ingle 4 years, 11 months ago
A covalent bond is formed by sharing of electrons ex. in a molecule of nitrogen two atoms are bonded covalently ( at. no. of N2 is 7 so it contains 3 electrons in 2p shell it needs 3 electrons to complete its octet so in a molecule of nitrogen both atoms contribute 3 electrons which are then shared by both and thus they attain nearest nobel gas configuration).
In a Coordinate bond both atoms contribute equal no. of electrons but they are not shared ex. HCl In hydrochloric acid both hydrogen and chlorine contribute one electron to the bond but chlorine being more electronegative than hydrogen exerts attracts the electron pair towards itself.
Posted by Muskan Khan 4 years, 11 months ago
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Posted by Manvi Gupta 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
A photon is a tiny particle of light. It is the tiniest particle of light possible in nature. A photon can also be described as a type of quantum, that is, a tiny particle. Some other types of quanta (plural) are electrons, neutrinos, and the Higgs boson.
A quantum is the tiniest particle possible of a particular substance. For example, in the case of an electron, it’s the tiniest particle possible of negatively-charged matter, just as a photon is the tiniest particle possible of light.
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Nidhi Ranjan 4 years, 11 months ago
Posted by Yogita Ingle 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
A molecule is the smallest unit (particle) of a compound having the physical and chemical properties of that compound. This does not mean that molecules can not be broken down into smaller parts, e.g. the atoms from which they are formed or the fragments of the molecule, each consisting of several atoms or parts of atoms.
A molecule is defined as the smallest unit of a compound that contains the chemical properties of the compound. Molecules are made up of groups of atoms. Describing the structure of an atom, an atom is also sub-divided into smaller units. Proton, electrons, and neutrons are sub-particles of an atom. The protons and neutrons are contained inside the nucleus of the atom and electrons revolve around the nucleus.
Posted by Neil Modi 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
Molality is also known as molal concentration. It is a measure of solute concentration in a solution. The solution is composed of two components; solute and solvent. There are many different ways to express the concentration of solutions like molarity, molality, normality, formality, volume percentage, weight percentage and part per million. The term needs to calculate the mass of the solvent and moles of solute.
Molality Formula
Molality(M)=Number of moles of solute/ Mass of solvent in kgs
Molality(M)=g×1000/ W×m
Posted by 🤟Royal Thakur 🤟 4 years, 11 months ago
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Posted by Muskan Roy 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
Wavelength of a beam of light =400 cm-1; 'v = 400 cm-1
v =1 /λ
λ = 1/v = 1/400 cm = 2.5 x 10-3 cm
= 2.5 x 104 nm.
Calculation of frequency
c = vλ
v = c /λ = cv = 3 x 1010 cm s-1 x 400 cm-1
= 1.2 x 1013 s-1
Posted by Tanmay Tiwari 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
Heavy water is a compound that is made up of oxygen and deuterium, a heavier isotope of hydrogen which is denoted by ‘2H’ or ‘D’. Heavy Water is also called deuterium oxide and is denoted by the chemical formula D2O.
Anjali Rajpoot 4 years, 11 months ago
Posted by Royal Thakur 4 years, 2 months ago
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Sia ? 4 years, 2 months ago
Organic chemistry is a branch of chemistry that studies the structure, properties and reactions of organic compounds, which contain carbon in covalent bonding. Study of structure determines their chemical composition and formula.
Posted by Shreyansh Yadav 5 years ago
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Yogita Ingle 5 years ago
Capacitance is the ratio of the change in the electric charge of a system, to the corresponding change in its electric potential.
Ayush Dwivedi 5 years ago
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Pk . 4 years, 11 months ago
Royal Thakur 5 years ago
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Yogita Ingle 5 years ago
1 min = 60 second
1 hour = 3600 second
1 day = 24 hour
2 day = 48 hous
SO 2 day = 48 × 3600 second = 172,800 second
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Yogita Ingle 5 years ago
When hydrogen gas present on discharge tube passed through high voltage & low pressure, the radiations emitted passed through spectroscope and spectrum is obtained on photographic plate. Hydrogen spectrum contains several lines known as series. The series present in hydrogen spectrum are:-
| Series | n1 | n2 | Spectral region |
| Lyman | 1 | 2,3,4,.. | Ultraviolet |
| Balmer | 2 | 3,4,5…. | Visible |
| Paschen | 3 | 4,5,6,7.. | Infrared |
| Brackett | 4 | 5,6,7… | Infrared |
| Pfund | 5 | 6,7,8… | Infrared |
Posted by Vaishali ..... 5 years ago
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Yogita Ingle 5 years ago
Avogadro’s law, also known as Avogadro’s principle or Avogadro’s hypothesis, is a gas law which states that the total number of atoms/molecules of a gas (i.e. the amount of gaseous substance) is directly proportional to the volume occupied by the gas at constant temperature and pressure. Avogadro’s law is closely related to the ideal gas equation since it links temperature, pressure, volume, and amount of substance for a given gas.
Dheeraj Kumar 5 years ago
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Vivek Kumar 4 years, 11 months ago
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Don'T Dare To Change It 5 years ago
Yogita Ingle 5 years ago
Molarity of a given solution is defined as the total number of moles of solute per litre of solution. The molality of a solution is dependent on the changes in physical properties of the system such as pressure and temperature as unlike mass, the volume of the system changes with the change in physical conditions of the system. Molarity is represented by M, which is termed as molar.
Molarity Formula:
The equation for calculating molarity is the ratio of the moles of solute whose molarity is to be calculated and the volume of solvent used to dissolve the given solute.
M=n/V
Here,
M is the molality of the solution that is to be calculated
n is the number of moles of the solute
V is the volume of solution given in terms of litres
Suryansh Rastogi 5 years ago
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Apeksha Pawaria 4 years, 11 months ago
1Thank You