19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Clemmensen's reduction will convert cyclohexanone into:
Clemmensen reduction involves > C = O to > CH2 in presence of
Which of the following reagents converts both acetaldehyde and acetone to alkanes?
The order of reactivity of phenyl magnesium bromide with the following compounds is
Identify the reactant X and the product Y
Product in following reaction is CH3MgI + HCHO → Product
Grignard reagent on reaction with acetone forms
Which of the following species is the conjugate acid of the hemiacetal formed by reaction of benzaldehyde with methanol containing a trace of acid ? (a) (b) (c) (d)
Benzaldehyde condenses with N,N-dimethylaniline in presence of anhydrous ZnCl2 to give
Which one of the following does not form sodium bisulphite addition product with sodium bisulphite solution
Reaction of acetaldehyde with HCN followed by hydrolysis gives a compound which shows
A and B in the following reactions are (a) (b) (c)
The most reactive compound towards formation of cyanohydrin on treatment with HCN followed by acidification is
Correct order of reactivity of CH3CHO, C2H5COCH3 and CH3COCH3 is
Which of the following carbonyl oxygen will form strongest hydrogen bond with 퐻2푂 molecule? (a) (b) (c) (d)
Product may be
Which of the aldehyde is most reactive towards nucleophilic addition reaction ?
Nucleophilic addition reaction will be most favoured in
The velocity of an electron in the second shell of hydrogen atom is
[CBSE AIPMT 2011] If n = 6, the correct sequence of filling of electrons will be
[VMMC 2010] Which of the following pairs is isoelectronic?
[KCET 2010] The wave number of a spectral line in the emission spectrum of hydrogen will be equal to (8/9)R_H if the electron jumps from
[MP PMT 2010] The relation between wave nature of light (photons) and stream of particles is given by de Broglie's equation:
[AMU 2010] When the electron of a hydrogen atom jumps from n = 4 to n = 1 state, the number of spectral lines emitted is
[RPMT 2010] Principal, azimuthal and magnetic quantum numbers are respectively related to