List of top Chemistry Questions

What is the maximum number of orbitals that can be identified with the following quantum number?
n = 3, l = 1, ml = 0
Calculate the energy in joule corresponding to light of wavelength 45 nm:
(Planck’s constant h = 6.63 × 10-34 Js; speed of light c = 3 × 108 ms-1)
Artificial sweetener which is stable under cold conditions only is:
D(+) glucose reacts with hydroxylamine and yields an oxime. The structure of the oxime would be:
Among the following complexes the one which shows zero crystal field stabilization energy (CFSE) is:
The weight of silver (at wt. = 108) displaced by a quantity of electricity which displaces 5600 mL of O2 at STP will be:
When 0.1 mol MnO42– is oxidised the quantity of electricity required to completely oxidise MnO42– to MnO4– is
The reaction of aqueous KMnO4 with H2O2 in acidic conditions gives:
In acidic medium, H2O2 changes Cr2O72- to CrO5 which has two (-O-O-) bonds. Oxidation state of Cr in CrO5 is
Which of the following orders of ionic radii is correctly represented?
Which of the following organic compoundspolymerizes to form the polyester Dacron?
Which of the following compounds will undergo racemisation when solution of KOH hydrolysis?
Which of the following compounds will undergo racemisation when solution of KOH hydrolysis?
Which of the following salts will give highest pH in water ?
Which of the following will be most stable diazoniumsalt RN2+X- ?
Which one of the following is not a commoncomponent of Photochemical Smog?
For $Cr_2O_7^{-2} + 14H^{+} + 6e^{-} \to 2Cr^{+3} + 7H_2O; E $$^\circ$= $1.33 V At [Cr_2O_7 ^{-2}] = 4.5$ milli mole $[Cr^{+3}]=15$ milli mole, $E$ is $1.067\, V$.The pH of the solution is nearly equal to
The number of double bonds in gammexane is :
Which of the following ions can be separated by a $NH_4OH$ in presence of $NH_4Cl$
One mole of $PCl_5$ is heated in a closed 2 $dm^3$ vessel. At equilibrium 40% $PCl_5$ is dissociated. Calculate the equilibrium constant.
The correct order of oxidising power is : $VO_2^+$ $< Cr_2O_7^{2-} < MnO_4^-$ The oxidation state of $Mn$ is $+7$.
In the presence of peroxide, $HCl$ and $HI$ do not give anti-Markownikoff' s addition to alkenes because :
Conversion of benzene diazonium chloride to chloro benzene is an example of which of the following reactions ?
Amongst $LiCl, RbCl, BeCl_2$ and $MgCl_2$ the compounds with the greatest and the least ionic character, respectively are :
Which one of the following molecules is paramagnetic ?
In S$_N$2 reactions, the correct order of reactivity for the following compounds $CH_3Cl,CH_3CH_2Cl, (CH_3 )_2CHCl$ and (CH$_3 )_3CCl$ is