Recently Active Chemistry Questions

What is the role of conc. H2SO4 in the nitration of benzene ?? ...

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*Image* has to be matched with (p) Nucleophilic substitution (q) Elimination (r) Nucleophilic addition (s) Esterification with acetic anhydride (t) Dehydrogenation i get p,q,r and many solution of jee09 have given only p why ...

a mixture of SO2 and O2 at 1atm in the mole ratio of 2:1 is passed thru a catalyst at 1170'C at a sufficient rate for the attainment of equilibrium the gas is suddenly chilled and analysed is found to contain 87% of SO3 by vo ...

A solution if (+)-2-chloro-2-phenylethane in toulene racemises slowly in the presence of small amount of SbCl5,due to the formation of a. Carbanion b. Carbene c. Free radical d. Carbocation ...

Rate of a reaction can be expressed by Arrhenius equation as: k=Ae-E/RT In this eqn, E represents? a...... b...... c. the energy above which all the colliding molecules will react. d. the energy below which colliding molcules ...

Which of the following statements are true ? a.)HF is less polar then HBr b.)absolutely pure water does not contains ions c.)chemical bond formation takes place when force of attraction overcomes forces of repulsion d)in cova ...

tollens reduce aromatic aldehyde dut fehlings do not why ...

How many chiral carbon atoms are present in 2, 3, 4-trichloropentane ? 4 1 . 2 3 how to decide ?any technique ...

The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature??? 1)-COOH,-SO3H,CONH2 2)-SO3H,-COOH,-CONH2 ...

A current of electricity is passed through a copper voltameter and a water voltameter connected in series if the copper anode of the copper voltameter now weighs 16 mg less ,hydrogen liberated at the cathode of the water volt ...

An aqueous solution containing 100grams of dissolved MgSO4 is fed to a crystallizer where 80% of the Dissolved salt crystallises out as MgSO4. 6H2O Crystals. How many grams of the hexahydrate salt Crystals are obtained from t ...

Assuming complete ionisation, the pH of 0.1M HCL is 1. The molarity of H2SO4 with the same Ph is: a) 0.1 b) 0.2 c) 0.05 d) 2.0 Acetone and acetaldehyde are: a) functional isomer b) position-isomers c) chain isomers d) not iso ...

where is the interstitial position present in a lattice cube . Is it the void?? ...

NaSO4 n Na2SO4 are alloys isomers isomorphous system polymorphous system ...

which is most basic among the following? MgO Na2O CaO Al2O3 how u will decide,,,,,,,,,,,,xplain me...... the maximum number of hydrogen bondsthat can be formed by a molecule of water----------- ...

Pb3O4 + HNO3 What will be the products ?? One option was it remains unreacted. Other options were asking which oxide remains unreacted and which nitrate will be formed ?? ...

*Image* Determin the ph of the aqeous soln of CLC6H4NH3CL KBCLC6H4NH2 ...

5g of alumunium treated with excess of dilute HCl ,the volume of hydrogen evolved at STP in dm3 Ans is 6.22......can u tell me how euql masses of zinc n bromine were allowed to react till completion of reaction to form ZnBr2 ...

Plz giv me the topics in solid state which r important for iitjee except those given in ncert.. ...

acetylene does not react with a] Na b]ammonical AgNO3 c]HCl d] NaOH which is most oxidising agent in O3 & H2O2 ...

1 mole of nitrogen is mixed with 3 mole of in a 3 litre vessel 20% of nitrogen is converted into ammonia. d equilibrium constant for d rean 1/2N2 +3/2 H2 <----> NH3 ...

wat is velocity constant ...

wat is oxidation number of iron in Fe(CO)5? xplain how to calculate ...

hey wats the relation between ionic mobility, transportation no and the equivalent conductance.?? Please help me ...

SILVER MIRROR TEST ...... IODOFORM TEST .... ...

*Image* answer Q no 3 ...

if we add NBS does Br add onto 3(degree) 2(degree) or first degree HYDROGEN????? pls explain y Eg *Image* ...

*Image* ans Q 6 ...

*Image* ans 8,9,10 ...