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  • 1 answers

Vithika Singh 7 years, 9 months ago

Abe Randi karishma bewkuf kis KO bana rahi h be...Sara setting kr k post ki hu..bhikari sali paisa k liye kisi ka v future barbad kr dogi tmlog
  • 2 answers

Diya Dyan 7 years, 9 months ago

Then what is the name of kf

Akash Agarwal 7 years, 9 months ago

When molality of soln is unity then the elevation in boiling point is eql to the molal elevation constant.
  • 2 answers

J Ranjan Parida 7 years, 9 months ago

?????

Ram Gupta 7 years, 9 months ago

Just go and do some chemical reaction evolving gases and listen the music ...???
  • 1 answers

Rahul Tiwari 7 years, 9 months ago

download from cbse.nic .in
  • 1 answers

Diya Dyan 7 years, 9 months ago

Carbohydrates that can reduce Fehling's solution and tollens reagents
  • 2 answers

Vithika Singh 7 years, 9 months ago

Aisa kuch nhi hota sale question setter k mood pe depend krta h khi se v utha k de deta h..phy ka paper hi dekh lo

J Ranjan Parida 7 years, 9 months ago

Organic part carry 28 marks inorganic is of 19 and physical is of 23 marks
  • 3 answers

Rohit Ladwal 7 years, 9 months ago

Ue any mild oxidising reagent like kmno4 , k2cr2o7 ,HNO3

Akash Agarwal 7 years, 9 months ago

Acidic kMnO4

Akash Agarwal 7 years, 9 months ago

Add acidia kano4
  • 1 answers

Shruti Agarwal 7 years, 9 months ago

This method is based on the principle that differently components of a mixture are differently adsorbed on the adsorbent.
  • 2 answers

A Cj 7 years, 9 months ago

Soap*

A Cj 7 years, 9 months ago

Page number 451, types of soap under medicated Susie
  • 1 answers

Salma Khan 7 years, 9 months ago

No,both are same,it contains 2 to 4%of carbon with some impurity
  • 4 answers

Go Pi 7 years, 9 months ago

Sorry. ERG (-CH3) in methylamine increase the proton acceptibility or basic strength of the ring. pKb is more for was less basic compounds.

Go Pi 7 years, 9 months ago

Aniline is more stable than anilium ion. Hence proton acceptibility or the basic nature of methyl

Go Pi 7 years, 9 months ago

Sorry. Thas wrong.

Go Pi 7 years, 9 months ago

Presence of electron releasing group decreases the acidity of aniline. (H+ is not freely released). pKa value is more for wear acids.
  • 1 answers

Nishtha Pandya 7 years, 9 months ago

Pls some1 answer it......!!!
  • 3 answers

Aman Jha 7 years, 9 months ago

Easy h ...page no.429

Go Pi 7 years, 9 months ago

Refer to this page you'll get idea

Go Pi 7 years, 9 months ago

PG.429
  • 1 answers

Go Pi 7 years, 9 months ago

Phosphodiester linkage
  • 1 answers

Go Pi 7 years, 9 months ago

Ag Br both doesn't have very much size difference(almost similar sizes). So it show schottky defect. While it also shows Frenkel defect as the cation (Ag) could disslocte to interstitial sites.
  • 0 answers
Vxt
  • 1 answers

Muskaan Gugnani 7 years, 9 months ago

Velocity X time is equal to displacement
  • 2 answers

Nishtha Pandya 7 years, 9 months ago

*rea..n rate constant* Rea..n rate const... is a const.. of proportionality in rate law eq..n & is equal to the rate of rea..n when the molar conductance of each of the reactants is unity .......................................................................................... Eate const... is const... for a particular rea..n at a particular temp.. & does not depends upon the concentra..n of the reactants . ..........................................................................................unit depends on order of re..n 0th order : mol L^-1 s^-1 1st order : s^-1 2nd order : mol^-1 L sec^-1 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *rate of re..n * It is the change in concentra..n of a reactant or product per unit time . ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ This at any instance of time depends upon the molar concentra..n of the reactants at tht time . ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Unit : mol L^-1 time^-1 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ???✌✌✌???

Shefali Mourya 7 years, 9 months ago

Rate expression tells us how the appearance /disappearance rates of reactants and products relate each other and rate constant is constant of proportionality that comes out of the rate law
  • 1 answers

Shefali Mourya 7 years, 9 months ago

It is an expression which accounts the rate constant and reaction order.
  • 2 answers

Go Pi 7 years, 9 months ago

https://www.embibe.com/exams/cbse-class-xii-marking-scheme-and-weightage-distribution-for-2017/

Shefali Mourya 7 years, 9 months ago

Its given in this app in syllabus portiom
  • 6 answers

Priya Dubey 7 years, 9 months ago

Ok thanks everyone... ?

Aman Jha 7 years, 9 months ago

Exceptional case asked derivation . But many times asked numericals.

Shefali Mourya 7 years, 9 months ago

Yes they are important

S Divya 7 years, 9 months ago

Yes . I have seen it in a previous year paper . Its easy to learn

Go Pi 7 years, 9 months ago

Don't ever waste Time on it.

Yaduvanshi Yaduvanshi 7 years, 9 months ago

No i think
  • 0 answers
  • 1 answers

Ruby Bajwa 7 years, 9 months ago

As in ferromagnetic substances when placed in magnetic field their domains get alligned in direction of magnetic field.
  • 1 answers

Go Pi 7 years, 9 months ago

Size of th colloidal particals should be comparable o that of the wavelength of the incident light. There should be greater difference in the refractive Indie o dispersion phase and medium. (page 139)
  • 2 answers

Shefali Mourya 7 years, 9 months ago

Due to sp2 hybridisation of C-atom in chlorobenzene, C-atom is more electronegative whereas in cyclohexyl chloride,C-atom is sp hybridised, i.e. less electronegative So, polarity of C—Cl bond in chlorobenzene is less than the C—Cl bond in cyclohexyl chloride. Further, due to delocalisation of lone pair of electrons of Cl-atom over the benzene ring, C—Cl bond in chlorobenzene acquires some double bond character while C—Cl bond in cyclohexyl chloride is a pure single bond. Thus, C—Cl bond in chlorobenzene is shorter than in cyclohexyl chloride. As dipole moment is a product of charge and distance, therefore, the dipole moment of chlorobenzene is lower than that of cyclohexyl chloride.

Go Pi 7 years, 9 months ago

Dipole moment is explained by the polarity off the atoms. Electron density is more on the less electro negative atom in the case of chlorobenzene I.e on the carbon due to resonance. While there is partial negative and partial positive charge exist in the latter case, giving net dipole moment.
  • 3 answers

Riya Sharma 7 years, 9 months ago

sorry ... gopika

Riya Sharma 7 years, 9 months ago

thank you k. goplika

Go Pi 7 years, 9 months ago

Iodine forms a volatile compound of Zr( I.e Zr+I2--->ZrI4) Which is later decomposed on tungsten filament, electrically heated to abut 1800K.(ZrI4-->Zr +2I2) pure metal is deposited on the filament.
  • 1 answers

Go Pi 7 years, 9 months ago

They may ask about the molar mass. If the given values are applied in the eq. [del]Tb=(kb×W2×1000)/M2×W1 Were M2 isn't given so using rhe eq, its coming as 120g. If i factor is calculated i= normal / abnormal mass. =60/120=0. Since i is less than 1 We can say the solute is associated

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