Recently Active Chemistry Questions

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an element adopts a cubical crystal structure in which only 68% ocupied.Edge length is 288 pm.If density of element is 7.2 g/cm3 ,the number of atoms in 144g of element ??? Volume=2.4*10^(-23) cc ...

2MnO-4 + 5 H2O2 + 6H+ ---> 2Mn2+ + 8H2O + 5O2 Which of the following r not true ? A) H2O2 is oxidised to O2 B) H+ IS OXIDIZED TO WATER C)Oxdn no. of Mn changes by 6 D) H2O2 is reduced by H2O ...

Q what will be open form of this one ?? *Image* ...

Q D-erythrose is treated in different beakers with 1)HNO3 forming A 2)Br2/H2O forming B a)Comment on optical activity of A,B b)A dicarboxylic acid .T/F c)B forms lactone . T/F ...

conc. H2SO4 Q Phenol +Phthalic anhydride-----------------------> B fusion color of B is ?? ...

Can someone please tell me what are Cp , Cv values for monoatomic, diatomic and triatomic gases ?? ...

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A carbonyl compound when reacts with NH2OH gives an oxime. The reaction is carried out at a pH equal to 5.What would be the product if the same reaction was carried out at a. pH=1 b. pH=13 ...

*Image* when reacts with MnO2 gives ____ ?? ...

What is the hybridisation of Cl in CH3Cl? Is it sp3 or unhybridised and the C-Cl bond is formed between sp3 orbital of C and p orbital of Cl? ...

Design a synthesis for the transformation of 1-butyne to 3-octyn-6-ol using 1-butyne as the only source for carbons. ...

MULTIPLE ANSWER TYPE Two isotonic solutions have (A) the same weight concentrations (B) the same vapour pressure (C) Osmotic pressure (D) All ...

Give me the products P and Q . no more information required to solve this one . I assure you this will test your concepts *Image* ...

*Image* From Carey. explain that circled line. C-C bonds also involved in hyperconjugation?? So, is C-C hyperconjugation more stabilising or C-H ??? ...

30.9 gm of (+)2-butanol was taken in a 309ml sloution & was mixed with 15.45gm of (-)2-butanol placed in 154.5ml and the final solution is passed through 444mm tube. What will be the observed rotation (in degrees) for the fin ...

What is the correct IUPAC name of the following compound - ? *Image* A) (2E,4Z,6Z)-4-chloro octa-2,4,6-triene B) (2Z,4E,6E)-5-chloro octa-2,4,6-triene C) (2E,4E,6Z)-4-chloro octa-2,4,6-triene D) (2Z,4Z,6E)-5-chloro octa-2,4,6 ...

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each of the mixtures listed below was placed in a closed container & allowed to stand . which of the following mixtures is not capable of attaining the equilibrium : CaCO3-----CaO + CO2 ?? A) pure CaCO3 B) CaO nd a pressure o ...

Hydrogenation of vegetable ghee at 25 c reduces the pressure from 2 atm to 1.2 atm in 50 minutes. find the rate of reaction ...

(A)Molality of a solution does not depend on Temparature (R)Molarity of a solution depends on temperature Options r the usual Assertion Reasoning ones ...

MORE THAN ONE CORRECT Q1 active mass = a)a=f.Cm b)a=r.Cm c)Amount of substance per unit volume d)No. of moles per unit litre Q2 consider eq eqn CH3COOH +HF <---->CH3COOH2 - +F - a)F- is conj base of HF b)F- is conj base ...

100 ml of 0.1 M NaAl(OH)2CO3 is neutralised by 0.25 N Hcl to form Nacl ,Alcl3 & CO2 Volume of Hcl reqd is ... (A) 10 mL (B) 40 mL (C) 100 mL (D) 160 mL ...

*Image* Explain the order for the methyl aniline and ethyl aniline.. The rest are obvious ...

MATCHING (A) Nacl & Na2SO4 1)Titrating with std solution of H2SO4 (B) Hcl & H2SO4 2)Heating the mixture (C) NaHCO3 & Na2CO3 3)Titrating with std solution of NaOH (D) CaCO3 & MgCO3 4) Treating with excess of Bacl2 ...

Which has highest dipole moment? CH3Cl CHCl3 CH2Cl2 CCl4 ...

why is a compound with paired electrons diamagnetic and unpaired paramagnetic? ...

The internal pressure of a real gas is inversely proportional to the square of molar volume TRUE/FALSE ...

find in order the Ratio of σ and Πbonds: A-tetracyanomethane B-CO2 C-benzene D-1,3 buta-di-ene ...

this thread aims at discussions on all possible aspects of organic chemistry that we feel are important for JEE 2010 ! members can put forward their question in this thread and we shall try and answer them together ! short co ...