Entrance Exam > JEE main > Chemistry | CBSE Board | Homework Help

Ask questions which are clear, concise and easy to understand.

Ask Question

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

Posted by Ak Babu Babu 1 month, 3 weeks ago

Entrance Exam > JEE main > Chemistry

2 answers

Ak Babu Babu 1 month, 3 weeks ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

Ak Babu Babu 1 month, 3 weeks ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

ANSWER

IA group elements

Posted by Kk Kk 7 months ago

Entrance Exam > JEE main > Chemistry

1 answers

Nivedya M 5 months, 3 weeks ago

Lithium,Sodium,Potassium, Rubidium, Caesium, Francium

0Thank You

ANSWER

The conductivity of the solution containing 1.0g of anhydrousBaCl2in 200cm^2 the solution has been to found to 0.0058s cm^-1. Calculate the molar and equivalent conductivity of the solution.

Posted by Vaibhav Tiwari 10 months, 3 weeks ago

Entrance Exam > JEE main > Chemistry

1 answers

Talha Rafiq 10 months, 2 weeks ago

Molar conductivity= 241.6 Equivalent conductivity= 120.83

0Thank You

ANSWER

What is this aptitude test??!

Posted by Yaakshini M 1 year ago

Entrance Exam > JEE main > Chemistry

1 answers

Harsh Jambe 8 months, 4 weeks ago

Carbon valence

0Thank You

ANSWER

Bhailog tmlog jee ka preparation kahan se kr rhe ho kon se lectures kr rhe ho main ab krna chahta hun hoga ya nhi kaise hoga

Posted by Rounak Anand 1 year, 4 months ago

Entrance Exam > JEE main > Chemistry

2 answers

Sweta Kuntal 7 months ago

Aram se ho jayega coaching mei time waste karna sa badiya hai khud padh lo acche sa

0Thank You

Vivek Bharti 1 year, 4 months ago

Mai Unacademy plus subscription liya hu wahi se kr rha hu bro

1Thank You

ANSWER

importance of quantum numbers and electronic configuration of periodicity of elements

Posted by Epistemophile . 1 year, 6 months ago

Entrance Exam > JEE main > Chemistry

0 answers

ANSWER

Chadwick discovered protons by bombarding a thin sheet of beryllium by Alpha particles when electrically neutral particles having mass slightly greater than that of protons were emitted. What actually was the reason behind this bombarding ?

Posted by Epistemophile . 1 year, 6 months ago

Entrance Exam > JEE main > Chemistry

1 answers

Akshiti Dugar 11 months ago

He was doing experiment for artificial radioactivity and accidentally discovered neutrons.

0Thank You

ANSWER

If electronegativity of H and Cl are 2.1 and 3 respectively and bond length of H2 & Cl2 are 0.74A⁰ & 1.98 A⁰ respectively, then calculate the internuclear distance of HCl molecule.

Posted by Epistemophile . 1 year, 7 months ago

Entrance Exam > JEE main > Chemistry

0 answers

ANSWER

If electronegativity of H and Cl are 2.1 and 3 respectively and bond length of H2 & Cl2 are 0.47A⁰ & 1.98 A⁰ respectively, then calculate the internuclear distance of HCl molecule.

Posted by Epistemophile . 1 year, 7 months ago

Entrance Exam > JEE main > Chemistry

2 answers

Rahul Kaushik 10 months, 3 weeks ago

Cintre

0Thank You

Epistemophile . 1 year, 7 months ago

Sorry I've posted the Q. with incorrect data

0Thank You

ANSWER

ag107 ag 109 if avg isotopic mass is 1080.5 then calculate percentage of each isotope

Posted by Pari Jadhav 1 year, 8 months ago

Entrance Exam > JEE main > Chemistry

0 answers

ANSWER

Calculate the mass in grams 1) 6.022*10^23 atom of o2

Posted by Chethan .S 1 year, 9 months ago

Entrance Exam > JEE main > Chemistry

0 answers

ANSWER

What's the name of man made lanthanoid

Posted by Aman Rajput 1 year, 10 months ago

Entrance Exam > JEE main > Chemistry

1 answers

Chethan .S 1 year, 9 months ago

Promethium `(Pm)`m

2Thank You

ANSWER

Looking Around

Posted by Rayeen Tosib 2 years ago

Entrance Exam > JEE main > Chemistry

0 answers

ANSWER

IUPAC name of (CH2OH)3C-CHO ?

Posted by Shivam Patil 2 years, 1 month ago

Entrance Exam > JEE main > Chemistry

0 answers

ANSWER

IUPAC name of 2,2,2-Trimethylhydroxy ethanal ?

Posted by Shivam Patil 2 years, 1 month ago

Entrance Exam > JEE main > Chemistry

0 answers

ANSWER

Difference between Average rate and Instantaneous rate.

Posted by Buangi Hmingchhuanmawii 2 years, 9 months ago

Entrance Exam > JEE main > Chemistry

1 answers

Sia ? 2 years, 9 months ago

Instantaneous Rate vs Average Rate
Instantaneous rate is the rate of a chemical reaction that is measured as the change of the concentration of reactants or products during a known time period.	Average rate is the rate of a chemical reaction that is measured as the change of the concentration of reactants or products during the whole time period of the progression of the chemical reaction.
Time
Instantaneous rate is measured for a particular moment or for a very short time period.	Average rate is measured for a longer time period.
Formula for Calculation
Instantaneous Rate of Change = Lim (t→0) [Δ(concentration of reactant or product) /Δ(time)]	Average Rate of Change = Δ(concentration of reactant or product) /Δ(time)

2Thank You

ANSWER

What are the factors affecting rate of reaction?

Posted by Buangi Hmingchhuanmawii 2 years, 9 months ago

Entrance Exam > JEE main > Chemistry

1 answers

Shilpa Devi 2 years, 8 months ago

Temperature, pressure

0Thank You

ANSWER

If edge length of cubic unit cell is a, face diagonal is √2a and body diagonal is √3a. Calculate the relationship between radius of presentation r and edge length when a) All lattice points along face diagonal are occupied. b) All lattice points on body diagonal are occupied.

Posted by Nishtha Bansal 2 years, 11 months ago

Entrance Exam > JEE main > Chemistry

1 answers

Ronak Padhan 2 years, 10 months ago

Not

0Thank You

ANSWER

Matter

Posted by Raja M 3 years ago

Entrance Exam > JEE main > Chemistry

2 answers

Aman Rajput 1 year, 10 months ago

It is a tiny partical of atom

0Thank You

Sia ? 2 years, 11 months ago

Matter is everything around you. Atoms and compounds are all made of very small parts of matter. Those atoms go on to build the things you see and touch every day. Matter is defined as anything that has mass and takes up space (it has volume).

0Thank You

ANSWER

Gives three examples of matter that sublimes

Posted by Vikram Kumar 3 years, 6 months ago

Entrance Exam > JEE main > Chemistry

2 answers

Aditi Dora 3 years, 3 months ago

Camphor acetone napthlene

0Thank You

Gaurav Seth 3 years, 6 months ago

The Changing of a solid directly into vapours on heating,and of vapours into solid on cooling is called as sublimation.

The solid substance which undergoes sublimation is called sublime.

The solid obtained by cooling the vapours of the solid called a sublimate.

For Ex:camphor,Iodine,Ammonium Chloride,Naphthalene etc.

4Thank You

ANSWER

The size of particle is enough to scatter light and exhibit Tyndall effect

Posted by Hemlata Narang 3 years, 7 months ago

Entrance Exam > JEE main > Chemistry

1 answers

Meghna Thapar 3 years, 7 months ago

Tyndall effect can be defined as the scattering of a beam of light by colloidal particles present in a colloidal solution. This effect can be observed when a fine beam of light passes through a small hole in a dark room. This effect occurs due to the scattering of light by particles of dust or smoke present in the air.

The Tyndall effect can also be observed when sunlight passes through the canopy of a dense forest. In the forest, the mist contains tiny droplets of water which act as colloidal particles dispersed in the air.

1Thank You

ANSWER

C11

Posted by Om Kadam 3 years, 7 months ago

Entrance Exam > JEE main > Chemistry

0 answers

ANSWER

Structure of the atom

Posted by Tse Ngodup 3 years, 8 months ago

Entrance Exam > JEE main > Chemistry

1 answers

Yogita Ingle 3 years, 8 months ago

An atom consists of heavy positively charged nucleus. The whole mass of the atom is concentrated in the nucleus.
The electrons in an atom revolve around the nucleus in definite circular paths called orbits or energy level.
Each energy level is associated with definite amount of energy.
The change in energy takes place when electron jumps from one energy level to another energy level.

3Thank You

ANSWER

Atoms and molecules

Posted by Tse Ngodup 3 years, 8 months ago

Entrance Exam > JEE main > Chemistry

0 answers

ANSWER

What is the difference between acid and bases

Posted by Ashmita Ghimirey 3 years, 8 months ago

Entrance Exam > JEE main > Chemistry

1 answers

Gaurav Seth 3 years, 8 months ago

Acids	Bases
i) Acids are sour in taste.	i) Bases are bitter in taste.
ii) Acid turns blue litmus to red.	ii) Bases turn red litmus to blue.
iii) Acid is a substance which contains hydrogen ion H+.	iii) Bases are substances which contain hydroxyl ion OH−.

1Thank You

ANSWER

Absorption spectra

Posted by Abhishek Kumar Mishra 3 years, 9 months ago

Entrance Exam > JEE main > Chemistry

2 answers

Vikhyat Bhati 2 years, 9 months ago

It is formed when white light is passed through a substance and transmitted light is analyzed by spectroscope. It gives dark lines on bright background. It is always discontinuous.

1Thank You

Rishik Bhuvanesh 3 years, 8 months ago

It is formed when white light is passed through a substance and transmitted light is analyzed by spectroscope. It gives dark lines on bright background. It is always discontinuous.

1Thank You

ANSWER

Which chapter is most important in chem.for12th?

Posted by Akshada Vaidya 4 years, 1 month ago

Entrance Exam > JEE main > Chemistry