Chemistry questions
29404 published questions with worked solutions.
- In S_N2 reactions, the correct order of reactivity for the following compounds: CH_3Cl , CH_3CH_2Cl , (CH_3)_2CHCl and...
- The species in which the N atom is in a state of sp hybridization is :
- The heats of combustion of carbon and carbon monoxide are –393.5 and –283.5 kJ mol^ -1 , respectively. The heat of formation (in...
- 18 g glucose ( C_6H_ 12 O_6 ) is added to 178.2 g water. The vapour pressure of water (in torr) for this aqueous solution is:
- The equilibrium constant at 298 K for a reaction A + B C + D is 100. If the initial concentration of all the four species were 1...
- Galvanization is applying a coating of :
- Decomposition of H_2O_2 follows a first order reaction. In fifty minutes the concentration of H_2O_2 decreases from 0.5 to 0.125...
- For a linear plot of log (x/m) versus log p in a Freundlich adsorption isotherm, which of the following statements is correct ?...Not in JEE Main or NEET syllabus
- Which of the following atoms has the highest first ionization energy ?
- Which one of the following ores is best concentrated by froth floatation method ?Not in JEE Main or NEET syllabus
- Which one of the following statements about water is FALSE ?Not in JEE Main or NEET syllabus
- The main oxides formed on combustion of Li, Na and K in excess of air are, respectively :Not in JEE Main or NEET syllabus
- The reaction of zinc with dilute and concentrated nitric acid, respectively, produces :
- The pair in which phosphorous atoms have a formal oxidation state of +3 is :
- Which of the following compounds is metallic and ferromagnetic ?
- The pair having the same magnetic moment is : [At. No. : Cr = 24, Mn = 25, Fe = 26, Co = 27]
- The distillation technique most suited for separating glycerol from spent-lye in the soap industry is :
- 2-chloro-2-methylpentane on reaction with sodium methoxide in methanol yields : (a) C_2H_5CH_2C(CH_3)_2 - OCH_3 (b)...
- The reaction of propene with HOCl ( Cl_2 + H_2O ) proceeds through the intermediate :
- In the Hofmann bromamide degradation reaction, the number of moles of NaOH and Br_2 used per mole of amine produced are :