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4 gram NaOH dissolved in 500 gram water .what is the concentration of the solution?

Posted by Pradeep Kumar 7 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Pradeep Kumar 7 years, 5 months ago

Plz provide the answer

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How alcohols are prepared by cumene

Posted by Anand V Ktpl 7 years, 5 months ago

CBSE > Class 12 > Chemistry

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O2 is gas but s8 is solid why?

Posted by Harish Kumar 7 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Pranjal Gaikwad 7 years, 5 months ago

The intramolecular forces in oxygen is weak van der Waals forces which causes it to exist in gaseous state. While sulphur does not form strong doulde bonds hence it exists as solid.

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What Is Difference Between Other Boards And CBSE Board? I Want To Know What Is Difference And This Cbse Board Is Really Helpful Or Not.

Posted by Rocky Choudhary 7 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Suzanne Fitzgerald 7 years, 5 months ago

If we compare cbse with hbse .... Then cbse is much better Bcoz for ex. ......if u wanna to join DU after 12th then 10 to 20 per cent less percentage will b marked of ur overall percentage bt in cbse it will b marked as it is......

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A solution is mixed with 300 gm of 23% solution and 400 gm solution by mass. Calculat the mass percent of the solution

Posted by Sanjeev Raj Sahu 7 years, 5 months ago

CBSE > Class 12 > Chemistry

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45 gm of C2H6O2 is mixed with 600 gm of water. Calculate the freezing point of solution

Posted by Sanjeev Raj Sahu 7 years, 5 months ago

CBSE > Class 12 > Chemistry

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Project on casine in milk

Posted by Anshul Dabral 7 years, 5 months ago

CBSE > Class 12 > Chemistry

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When we go from left to right in a period . Is Electronegativity increase or decrease?

Posted by Subhash Chand 7 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Ritu Singh 7 years, 5 months ago

Increase

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Shivam Pandit 7 years, 5 months ago

Increase the electronegativity from left to right

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What is the difference between cresol and catachol?

Posted by Sumith Bh 7 years, 5 months ago

CBSE > Class 12 > Chemistry

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Why ammonia is a good complexing agent?

Posted by Kyntiewnam Kharkrang 7 years, 5 months ago

CBSE > Class 12 > Chemistry

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Chlorobenzene to phenol

Posted by Anchal Maurya 7 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Gulshan Kumar Sahu 7 years, 5 months ago

React with aq.KOH then KCL will be eliminated

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Anshu Vats 7 years, 5 months ago

Reaction of chloribenzene with NaOH yield phenol

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What is wutz reaction

Posted by Saniya Zehra 7 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Ritu Singh 7 years, 5 months ago

R-X+2Na+X-R DRY ETHER---------R-R+2NaX

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What is tisunk reaction

Posted by Somali Banerjee 7 years, 5 months ago

CBSE > Class 12 > Chemistry

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hoffman amonolysis

Posted by Yogeshwar Rana 7 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Ritu Singh 7 years, 5 months ago

CH3CH2-Br +NH3-----------CH3CH2NH2 +HBr

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What are semi molar and deci molar solutions

Posted by Vinti Charandeep 5 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 7 years, 5 months ago

Semi Molar solution is the solution whose morality is ½.
Decimolar solution is that solution when one tenth mole of a solute remains in one litre solution that means the strength of decimolar solution is known. So decimolar solution is called a standard solution.
e.g: 0.1 M NaOH solution means that the strength of NaOH is 0.1M which is known. So, 0.1 M NaOH solutions is standard solution.

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The standard reduction potential for Zn2+/Zn is -0.76V .Write the reaction occuring at electrodes when coupled with SHE.

Posted by Vaishnavi Singh 7 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Ritu Singh 7 years, 5 months ago

At anode: Zn------Zn +2e At cathode: 2H+ +2e-----H2

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What do you mean by Electronegativity and Electropositivity

Posted by Subhash Chand 7 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 7 years, 5 months ago

Electropositivity is a measure of an element's ability to donate electrons, and therefore form positive ions (Eg. Na, Ca, Mg, Al, Li) and electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons thus form negative ions (Eg. F, Cl, O). Transition Elements Are Metals. Thus They Are Obviously Electropositive.
If the element is electron donating then we can conclude that it is electropositive and if it is electron accepting then it will be electronegative. Most of the non metals are electronegative.

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Wht is solubility in halo alknes $ arenes chapter

Posted by Lavi Pal 7 years, 5 months ago

CBSE > Class 12 > Chemistry

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2018chemistrt compartment question ppr

Posted by Lavi Pal 7 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Lavi Pal 7 years, 5 months ago

Full question ppr of chmeistry compart ment 2018

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Lavi Pal 7 years, 5 months ago

Whr is question ppr of chemistry compartment 2018

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What is the order of photochemical reaction

Posted by Jaipreet Kaur 7 years, 5 months ago

CBSE > Class 12 > Chemistry

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Why current move opposite direction of electrons? Is any force is involved in this process?

Posted by Ajay Vishnoi 7 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Manish Yadav 7 years, 5 months ago

See it was an early assumption that the direction of +vely chages (protons) is the direction of current but now we are well known that only electron can come out and it is -ve so now also we take the same with the fact that e- move in opposite direction of protons

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Shreyas Trivedi 7 years, 5 months ago

Yes the potential difference , like +ve terminals lack electrons and -ve have ample of them thus they flow from negative to positive end If u take the opposite charge positron or a proton for it it is excess in +ve terminal thus moves from excess to defficient point

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In two vessels each containing 500ml water, 0.5mol of aniline and 25m mol of HCl are added separately. Two hydrogen electrodes are constructed using these solutions. Calculate the emf of cell made by connecting them appropriately

Posted by Harshita Harsh 7 years, 5 months ago

CBSE > Class 12 > Chemistry