Recently Active Chemistry Questions

Why the lowest oxide of transition metals is basic,whereas the highest is amphoteric/acidic?? ...

In nitroprusside ion, the iron & NO exists as Fe(2) & NO+ rather than Fe(3) & NO.These forms can be differentiated by- a)estimating the conc. Of iron b)measuring the conc. Of CN- c)measuring the solid state magnetic moment d) ...

arrange in inc order of acidity: [Na(H20)6]+ [Sc(H20)6]3+ [Fe(H20)6]3+ [Mn(H20)6]2+ [Ni(H20)6]2+ ...

Q1 Boiling CuCl2 with excess copper turnings and conc HCl gives ?? Q2 Cu2+ is more stable than Cu+ due to ?? Q3 CuSO4 + lime = ?? Q4 Yellow mercuric oxide is obtained by? Q5 The iron salt used in blue prints is ?? ...

pls give answer with explanation.... *Image* tell me if image is not clear enough ...

Q: Compound A (C7H15Br) is not a primary alkyl bromide. It yields a single alkene B on being heated with NaOC2H5 / C2H5OH. Hydrogenation of B gave 2,4-dimethyl pentane. Identify A and B. PS: Scroll down to meet few more quest ...

Q1 green powder blown in air during fireworks from ammonium dichromate is ? Q2 why ferric chloride is used for etching copper and silver metals ? Q3 heating ferric sulfate gives ?? ...

We know dat a Compound isnt optically active if it has 1] plane of symmetry 2]axis of symmetry 3]centre of symmetry but how do we find whether a compound has any kind of symmetry or not ?? plane of symmetry is not difficult t ...

how to convert chlorobenzene to benzene????? ...

Q1species undergoing disproprtionation in alkaline medium ? a)Cl2 b)MnO42- c)NO2 d)ClO42- Q2metal oxide decomposing on heating ? a)ZnO b)Al2O3 c)Ag2O d)HgO ...

Ques) Match column (I) and (II) *Image* ...

Q. conversion of cyclohexene to cyclohexanol can be easily achieved by....... a) NaOH + H2O b) Br2, H2O c) hydroboration oxidation d) hydroboration hydrolysis what is hydroboration hydrolysis?? ...

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Q1 Mercury is liquid at 0°C due to _________ and _________ Q2An element in 3d transition series shows 2 oxidn states x an dy which differ by 2 units.Find conditions between x and y for compound to be ionic and covalent Q3WHi ...

Q1 FeI3 doesnt exist becoz ? Q2 MnO2 dissolves in conc. HCl to form ? Q3 In which of the following ,color is due to charge transfer ? a)[Mn(OH)4]2- b)MnO42- c)MnO2 ...

Q1 Na2CO3 +Fe2O3→A +CO2 Q2 AgNO3→heat W+X+O2 X+ H2O→HNO2+HNO3 W+HNO3→Y+NO+H2O Y+Na2S2O3(excess)→Z+NaNO3 ...

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The major product P of the given reacn is :- *Image* This is not my doubt ...

Q1 Philosopher's wool when heated with BaO at 1100 C gives ? Q2Which managanese oxide is amphotseric ? Q3 copper (II) ions give redish brown ppt wth potassium ferrocyanide.Find formula of ppt. its Cu2[Fe(CN)6] naa ?? Q4 how t ...

Q1 Anhydrous Ferric chloride is prepared by ?? Q2 FeCl3.6H2O is actually ?? Q3 Ferrous and ferric ions may be distinguished by ? Q4 Ferric ions are estimated by ? Q5 Mohr Salt on oxidation with conc. HNO3 gives ? ...

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i just wanna confirm dat does NaNH2 converts internal alkyne to terminal alkyne??? ...

Ques) Hydrolysis of the following gave :- *Image* Here , 'X' should be what ?????????? ...

In nitroprusside ion the iron and NO exist as Fe(II) and NO+ rather than Fe(III) and NO. These forms can be differentiated by : (A) estimating the concentration of iron. (B) measuring the concentration of CN. (C) measuring th ...

p-Chloroaniline and anilinium hydrochloride can be distinguished by: (A) Sandmeyer reaction (B) NaHCO3 (C) AgNO3 (D) Carbylamine test ...

*Image* This reaction sequence can start with a :- (a) 1° alcohol (b) 2 ° alcohol (c) 3° alcohol (d) Phenol ...

Is there any relation between basisity and nucleophilicity? Can we compare them? ...

1) The dissociation const of monobasic acids A,B,C and D are 6 X 10 -4, 5 X10 -5 , 3.6 X 10 -6 and 7 X10 - 10 respectively. pH values of their 0.1 molar aqueous solution are in the order (a) A >B> C >D (b) D>B> ...

Q1 why vinyl alcohol is not directly polymerised to form poly vinyl alcohol ??? Q2what type of polymer is this ?? -CH2 -O -[CH2 - O -] - ...

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