Recently Active Chemistry Questions

*Image* ----(NH4)2 Sx-----> A -----Br2/H2O ---->B ----NaNO2/Hcl---> C ----Sn/Hcl---> D ---Br2/H2O----> E Fond the total no of Br atoms present in (E) ??? ...

Kb of an acid base indicator is 10-9. The pH at which its 10-3M solution shows colour change is -------. plz provide ur method also... ...

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Can anyone tell about Retro aldol reaction? Please I need to know it. ...

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1. .HCOOH IS ONLY MONOBASIC ACID WHICH UNDERGOES OXIDATION WITH OXIDISING AGENT .HCOOH BEHAVES AS ACID AS WELL AS ALDEHYDE 2..M.P OF FUMARIC ACID > .M.P OF MALEIC ACID MP OF SYMMETRICAL MOLECULE> UNSYMMETRICAL MOLECULE ...

64Cu(T50=12.8h) decays β- emission( 38 %),β+ emission(19%) and electron capture(43%).Write the decay products and calculate partial half-lives for each of the decay process. didnt exactly understand the q. ...

The time required for 10% completion of a first order reaction at 298 K is equal to that required for its 25 % completion at 308 K.If pre exponential factor for the reaction is 3.56 x 109s-1,calculate its rate constant at 318 ...

The correct statement(s) about the compound H3C(HO)HC–CH=CH–CH(OH)CH3 (X) is(are) (A) The total number of stereoisomers possible for X is 6. (B) The total number of diastereomers possible for X is 3. (C) If the stereochem ...

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An experiment requires minimum beta activity product at the rate of 346 beta particles per min.The half life period of 99Mo42,which is a beta emitter is 66.6 hours.Find the minimum amount of 99Mo42 required to carry out the e ...

Which of the following is coloured due to polarisation? 1. Ag3PO4 2. Cu2Cl2 3. K4[Fe(CN)6] 4. CuF2 ...

Q1 The reaction Cis-Cr(en)2(OH)2+≈Trans-Cr(en)2(OH)2+ where ≈ denotes equilibrium is first order in both the directions.At 25 C teh eq constant is 0.16 and rate constant k1=3.3*10-4 .In an experiment starting with pure ci ...

A compound X(C7H8O) is insoluble in water,dilute HCl and aqueous NaHCO3 but dissolve in dil. NaOH.When X is treated with Bromine water ,it is converted into a compound of formula C7H5OBr3. identify X ...

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Q1. The spin quantum numbers +1/2 and -1/2 for the electron spin represent (a) rotation of the electron in clockwise and anticlockwise direction respectively (b) rotation of the electron in anticlockwise and clockwise directi ...

The co-ordination number of Cr in [Cr(Ï€6-C6H6)2 ] is x. Then x/2 will be ? ...

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