Hello candidate,

Chemistry in everyday life, polymers, and biomolecules are most important for the JEE Mains examination and the syllabus for from this chapter does not come very frequently in the JEE advanced examination. So, it's better that you focus on the JEE Mains examination perspective in order for preparing for the chapters people in depth question from the chapter are not expected very often as per previous year trends. So, NCERT class 11th and class 12th text books would be enough for solving most of the questio in previous year paper from these chapters.

Good Luck!!

Hey student,

9 How many hydrogen bonded water molecules are associated in CuSO4. 5H2O ? Solution Only one water molecule, which is outside the coordination sphere, is hydrogen bonded. The other four molecules of water are coordinated with copper cation.

All the best student,

Hope this helps you.

Hi

A Molecule of a substance is defined as the smallest possible unit of a substance having all the physical and chemical properties of the substance. It is usually formed by two or more atoms coming togather to form a smallest identifiable unit

This molecule are formed when atoms come together to form chemical bonds which are generally formed by sharing or donating electrons between the atoms. There are different types of bondings like

Ionic

Covalent

Hydrogen bonds

Van der walls interactions

Hope this helps

hello Zarikul hoque,

hope you are doing well now coming back to your question,

As we know that in general, a non-linear molecule with N atoms has 3N – 6 normal modes of vibration, but a linear molecule has 3N – 5 modes, because rotation about the molecular axis cannot be observed. A diatomic molecule has one normal mode of vibration, since it can only stretch or compress the single bond.

hope this will help you lot,

Thank you.

hello rohit

As we know that for a molecule, molecular weight in grams is equal to the Avogadro number and for transforming between moles and grams, we could use the molar mass of the substance. Avogadro’s number can be expressed as the number of elementary particles such as molecules, atoms, compounds, etc. per mole of a substance and Avogadro number is often denoted as NA.

18 mole of water will contain 18×6.023×1023 number of molecules.

therefore the number of water molecules is maximum in 18 moles of water.

hope this will help you a  lot.

thank you.

For previous year jee main questions along with answers you can visit the below link-

https://engineering.careers360.com/download/jee-main-sample-papers-previous-years

Here you will be able to download the question paper along with the answer key/scheme for free in a pdf format.You can practice these papers and find questions related to bio molecules from them.

hello Sr,

Hope you are doing well ,Now to answer your question

As we know that Molar mass of ammonia is 17g

17g ammonia contains 6.022×10^23 number of ammonia molecules due to this 4.25 g ammonia will contain,

(6.022×10^23×4.25)/17 = 1.5×10^23

number of ammonia molecules.

hope this will help you a lot

thank you.

hello s r,

As we know that,

Mass of Sulphuric (H2SO4) = 0.49g

We have the number of molecules in 0.49g of H2SO4

Molecular mass of H2SO4 = (Atomic mass of H) x 2 + (Atomic mass of S) x 1 + (Atomic mass of O) x 4

Molecular mass of H2SO4 = ( 1 x 2) + (32 x 1) + (16 x 4)

= 2 + 32 + 64

= 98.


Now,

According to the formula,

Number of moles in the given H2SO4(n)

= Mass of H2SO4 in grams/Molecular mass of H2SO4

= 0.49/98

= 0.01/2

= 0.005

: n = 0.005 mol


: 1 mol of H2SO4 contains 6.022 x 10^23 molecules.


: 0.005 mol of H2SO4 contains 0.005 x 6.022 x 10^23 molecules.


= 0.003011 x 10^23 molecules .


that is 0.49 g of H2SO4 contains 0.003011 x 10^23 molecules of H2SO4.
hope this will help you lot.