Recently Active Chemistry Questions

why does electromagnetic field is created around an oscillating charged particle ...

in beta-emmision 0n1 -----> +1p1 + -1e° what do the superscript and subscript mean?? if superscript means mass .... is it approximaed 0 for electron ?? ...

i just could not understand the formation of crystals. the unit cube of CsCl is made of one Cs at the centre with eight Cl around it. our teacher explained it that the Cl atoms at the corners are shared and so the net no. of ...

I wanna know what happens when a Grignard reacts with a carboxylic acid. does it just take the O of the OH bond? or does it attack the compound like it attacks aldehydes and keetons? ...

can anybody tell what is allkylation??? like we find majaor and minor products from methyl---cyclohexene & cyclohexane attached via double bond to --CH2 .....this is done on the basis of allkylation..... ...

What are the main topics that we must cover in Atomic structure for JEE? This chapter is full of lengthy formulas, which are typical to keep in memory So what sort of topics must be focussed in this chapter? Please suggest... ...

*Image* identify incorrect statements for the given reaction, 1) it's intra molecular ester formation 2)product can be resolved into optically active compounds(BTW, what do we mean by this?pls elaborate) 3) the product format ...

If the velocity of an electron moving in the first Bohr's Orbit of hydrogen has to reduced to 7.27 X 105m,it should be shifted by??? ...

100 mL of aqueous solution of glucose with osmotic pressure 1.2 atm at 25°C is mixed with 300 mL of aquous solution of urea at 2.4 atm at 25°C. the osmotic pressure of the mixture will be 1. 1.1 atm 2. 2.6 atm 3. 1.68 atm 4 ...

Q. What are the chain isomers of cyclopentane? Ans: Methylcyclobutane and 1,2-Dimethylcyclopropane. Why not 1,1 - dimethylcyclopropane? ...

Q what is the pH of a solution made by mixing 100 mL HCl and 200 mL aniline? Kb for aniline is 4.6 x 10^(-10) One can solve this prob after realising a buffer is formed. The ans given in the book is 4.89 which is what we get ...

A sample of wusite Fe.93O1.00..find the % of Fe(III)in the sample... ...

We know that a energy of a electron shell is given by E= 2pi2z2e4m/n2h2 But then according to aufbau principal lower the shell number lower is the energy but according to formula e is inversely proportional to n2??? ...

in which case condensation is favoured? a) CH3NO2+CH3CHO B) CH3CHO+CH3CH2CHO C) CH3CHO+C6H5CHO D) CH3COCH3+CH3CHO With explanation! please answer if sure ...

1. *Image* Unlike other aromatic amines, why is this amine strongly basic? 2. Compare the dipole moments of the following compounds: *Image* 3. What is the major elimination product? *Image* 4.Identify the bond which will und ...

CH3-CH(C2H5)-CH2-CH(C2H5)-CH3 Y do we call it as 3,5-di methyl heptane>? y can' t we call it as 2,4-diethly pentane? ...

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1) give mechanism and product please. 2) give the mechanicsm for the given reaction. *Image* *Image* ...

provide explaination pls, 1) more stable is? a) trans 1,2 cyclohexane diol b) trans 1,3 cylohexame diol 2) correct order of acidic strength? a) rcooh > hoh > roh > ch=ch (triple bonde not double) b) rcooh > hoh &g ...

is there any good short book for physical chemistry to claer my fundamentals. ...

Why AlCl3.6H2O is electrovalent..whereas AlCl3 is covalent?plzzzz.. help. ...

could anyone list the migratory aptitude in pinacol reearrangement???? ...

The odour of skunks is caused by chemical compounds called thiols. these compounds of which butanethiol (C4H10S) is a represntative example can be deodourised by reaction with household bleach (NaOCl) accorbing to the equatio ...

10mL of 1 N HCl is mixed with 20mL of 1M H2SO4 and 30mL of 1 M NaOH.The resultant solution has 1.20 meq of H+ions 2.20 meq of OH- 3.0 meq of H+ or OH- 4. 30 milli moles of H+ ...

Which of the two has greater dipole moment - A) mono chloro methane *Image* B) tri chloro methane *Image* ...

a zinc rod weighing 25g was kept in 100ml of 1 M CuSO4 solution. after a certain time the molarity of Cu2+ in the solution was 0.8 M. the weight of zinc rod left is equal to (A) 1.308 g (B) 23.692 g (C) 25g (D) none of these ...

a 1.0*10-3 moles of chloride of an element X is completely hydrolysed. It ws found that the resulting solution required 20 ml of 0.1 N AgNO3 for complete precipitation of the chloride. then X could be (A) Al (B) P (C) Si (D) ...

0.5 g of fuming H2SO4 (oleum) is diluted with water. This solution is completely neutralized by 26.7 ml of 0.4 N NaOH. The % of free SO3 in the solution is (A) 20.6% (B) 26% (C) 30% (D) 19% ...

1)which one reacts fastest with aq. methanol ? a. Me3C-Br b. Me3C-Cl c.Me2CH-Br c. Me-CH2-CH2-Br 2)find the product of the following reaction - 1-bromo-4fluoro-benzene + Mg (+ether) ---> ...

in test no 514 Q5 The sum of the protons and neutrons in an atom is its a) atomic number b) atomic weight c) atomic energy d) none Your Answer: (d) Correct Answer: (b) Score: -1 Explaination : it is atomic wt. is it right???? ...