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Ruthorfords postulates

Posted by Soumya Ranjan 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Naveen Sharma 8 years, 4 months ago

Postulates of Rutherford nuclear model:

Positive charge is concentrated in the center of the atom, called nucleus.
Electrons revolve around the nucleus in circular paths called orbits.
The nucleus is much smaller in size than the atom.

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What is expanded octet,0dd octet,

Posted by Dhrupadh Lathikaran 8 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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What is the syllabus of chemistry of sa1

Posted by Sandeep Kumar 8 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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NH4CL what will be the bonding

Posted by Shruti Verma 8 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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What is structure of Becl2

Posted by Bikramjeet Singh Jamwal 8 years, 4 months ago

CBSE > Class 11 > Chemistry

2 answers

Bikramjeet Singh Jamwal 8 years ago

Structure of Becl2 is Linear

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Aman Yadav 8 years, 4 months ago

Linear

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What do you mean by dipole moment

Posted by Deepika Singh 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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Important topics in the s-block elements

Posted by Amarjeet Kumar 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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On the basis of bohr's theory find out the value of angular momentum of an electron in the fifth orbit of hydrogen atom

Posted by Sunswrang Brahma 8 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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Name the element which hybrid in the fully filled or vacant orbital

Posted by Shivam Chaudhary 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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Copper combines to form 2 oxides 0.716 gm of copper (1) oxides contain 0.636gm of copper. 0.398 gm of copper(2) oxide contains 0.318gm of copper. Prove that this data illuatrate law of multiple proportion.

Posted by Bishal Tiwari 8 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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What is Radiation. Explain with example

Posted by Rishabh Pratap 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Arun Soni 8 years, 4 months ago

Radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium. This includes: electromagnetic radiation, such as heat, radio waves, visible light, x-rays, and gamma radiation (γ).

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Define acceleration

Posted by Aditya Tomar 8 years, 4 months ago

CBSE > Class 11 > Chemistry

2 answers

Bhawani Tanwar 8 years, 4 months ago

It is the rate of change of velocity with respect to time.

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Mayank Singh 8 years, 4 months ago

It is btaye of change of velocity

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what is orbitals

Posted by Mahipal Singh 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Kumar Aryan 8 years, 4 months ago

The area enclosed by an orbit where there is a probability to find an electron

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What is azimuthal Quantum no.

Posted by Yash Soni 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Mayank Singh 8 years, 4 months ago

It is a quantum no which describe about the s p de subshell denoted by l

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What is hypercojucation

Posted by Muskan Didwaniya 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Arun Soni 8 years, 4 months ago

Hyperconjugation is the stabilising interaction that results from the interaction of the electrons in a σ-bond (usually C-H or C-C) with an adjacent empty or partially filled p-orbital or a π-orbital to give an extended molecular orbital that increases the stability of the system.

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Shielding effect

Posted by Mansi Sharma 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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Fire is which state of matter?

Posted by Dikshant Kamboj 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Arun Soni 8 years, 4 months ago

Fire is actually a chemical reaction. It's an oxidation reaction to be specific. When wood gets hot enough (the part of the wood that is burning) the large hydrocarbons break down to charred solids and a gas. The gas is what reacts with oxygen in the atmosphere to produced light, CO₂ and H₂O.

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Why Kelvin is never negative??

Posted by Ashish Chauhan 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Arun Soni 8 years, 4 months ago

On the Kelvin scale the coldest temperature possible, -273^oC, has a value of 0 Kelvin (0 K) and is called the absolute zero. Because there are no lower temperatures than 0 K, the Kelvin scale does not have negative numbers.

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What is meant by IP

Posted by Jai Singh 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Bidisha Roy 8 years, 4 months ago

IP means ionization potential

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What is bond angle?

Posted by Parvathi Ashok 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Himanshu Singhal 8 years, 4 months ago

A bond angle is the angle formed between three atoms across at least two bonds.

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What is mole

Posted by Vivek Singh 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Arun Soni 8 years, 4 months ago

A mole is the amount of pure substance containing the same number of chemical units as there are atoms in exactly 12 grams of carbon-12 (i.e., 6.023 X 10²³).

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What is hydration energy

Posted by Riya Tyagi 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Arun Soni 8 years, 4 months ago

Hydration energy (also hydration enthalpy) is the amount of energy released when one mole of ions undergo hydration which is a special case of solvation. It is a special case of dissolution energy, with the solvent being water.

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What is sub atomic particles

Posted by Aryan Chauhan 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Payal Singh 8 years, 4 months ago

Particles that are smaller than the atom are called subatomic particles. The three main subatomic particles that form an atom are protons, neutrons, and electrons. The center of the atom is called the nucleus.

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Define Organic chemistry .

Posted by Sk Sharma 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Yash Vardhan Ahuja 8 years, 4 months ago

Organic chemistry- This branch of science deals with study of carbon compounds especially hydrocarbons and their derivatives.

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How find spin quantum number

Posted by Abhishek Yadav 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Arun Soni 8 years, 4 months ago

In one orbital, the orientation of the two electrons are always the opposite of each other. One electron will be spin up, and the other electron is spin down. If the last electron that enters is spin up, then m_s = +1/2. If the last electron that enters is spin down, then the m_s = -1/2.

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What is ionisation anthalpy

Posted by Khushal Vaid 8 years, 4 months ago

CBSE > Class 11 > Chemistry

2 answers

Bhawani Tanwar 8 years, 4 months ago

The amount of energy required to remove an electron from the valence shell of the isolated gaseous atom.

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Sukhman Singh 8 years, 4 months ago

The energy needed to remove electron from outermost shell of an atom in gaseous state

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Calculate the total number of neutrons in 7mg of 14g carbon.

Posted by Ankit Modi 8 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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Calculate the wavelength , frequency and wave number of a photon having energy equal to 19.95 j/mol

Posted by Anjai Sharma 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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What is mole fraction?

Posted by Rajat Samrat 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Arun Soni 8 years, 4 months ago

Mole fraction is another way of expressing the concentration of a solution or mixture. It is equal to the moles of one component divided by the total moles in the solution or mixture.

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Why rain drops are in circular shape.

Posted by Mahima Singh 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Parvathi Ashok 8 years, 4 months ago

To reduce the energy of the molecule they tend to take up the circular shape so they can reduce surface area and hence reduce the number of molecules in their surface since water molecules at the surface has more energy compared to the water molecules at the bottom.

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