List of top Chemistry Questions

A hydrocarbon A (C4H8) on reaction with HCl gives a compound B (C4H9Cl) which on reaction with 1 mol of NH3 gives compound C (C4H10N). On reacting with NaNO2 and HCl followed by treatment with water, compound C yields an optically active compound D. The D is
Permanent hardness cannot be removed by
The method by which aniline cannot be prepared is

The product B is
Which is the most suitable reagent for the following conversion ?
Chemical Reaction and Compound
Which of the following is not true for oxidation ?
Chemical Reaction
A and C are
The reagent which can do the conversion CH3COOH → CH3 - CH2 - OH is
Chemical Equation
A, B and C respectively are
Ka values for acids H2SO3, HNO2, CH3COOH and HCN are respectively 1.3 × 10-2, 4 × 10-4, 1.8 × 10-5 and 4 × 10-10, which of the above acids produces stronger conjugate base in aqueous solution ?
In set of reactions, identify D
Chemical Reactions
A compound ‘A’ (C7H8O) is insoluble in NaHCO3 solution but dissolve in NaOH and give a characteristic colour with neutral FeCl3 solution. When treated with Bromine water compound ‘A’ forms the compound B with the formula C7H5OBr3. ‘A’ is
An organic compound ‘X’ on treatment with PCC in dichloromethane gives the compound Y. Compound ‘Y’ reacts with I2 and alkali to form yellow precipitate of triiodomethane. The compound X is
For the reaction A(g) + B(g) ⇌ C(g) + D(g); ΔH = -QKJ
The equilibrium constant cannot be disturbed by
Chemical Reaction of compounds
The product ‘A’ gives white precipitate when treated with bromine water. The product ‘B’ is treated with Barium hydroxide to give the product C. The compound C is heated strongly to form product D. The product D is
The major product of the following reaction is CH2 = CH - CH2 - OH product
The order of reactivity of the compounds C6H5CH2Br, C6H5CH(C6H5)Br, C6H5CH(CH3)Br and C6H5C(CH3)(C6H5)Br in SN2 reaction is
Bond enthalpies of A2, B2 and AB are in the ratio 2 : 1 : 2. If bond enthalpy of formation of AB is -100 KJ mol-1. The bond enthalpy of B2 is
Compound(Major product)
The compound A (major product) is
The correct order for wavelengths of light absorbed in the complex ions
[CoCl(NH3)5]2+, [Co(NH3)6]3+, [Co(CN)6]3- is
Homoleptic complexes among the following are
(A) K3[Al(C2O4)3], (B) [CoCl2(en)2]+, (C) K2[Zn(OH)4]
The IUPAC name of [Co(NH3)5(CO3)]Cl is
For the crystal field splitting in octahedral complexes,
When the absolute temperature of ideal gas is doubled and pressure is halved, the volume of gas
Which one of the following is correct for all elements from Sc to Cu ?