Chemistry questions
29404 published questions with worked solutions.
- Sulphide ion is soft base and its ores are commonfor metals. (a) Pb (b) Al (c) Ag (d) Mg Choose the correct answer from the...Not in JEE Main or NEET syllabus
- An organic compound A (C_6H_6O) gives dark green colouration with ferric chloride. On treatment with CHCl_3 and KOH, followed by...
- The total number of unpaired electrons present in [Co(NH_3)_6]Cl_2 and [Co(NH_3)_6]Cl_3 is
- Methylation of 10 g of benzene gave 9.2 g of toluene. Calculate the percentage yield of toluene______. (Nearest integer)
- The number of acyclic structural isomers (including geometrical isomers) for pentene are
- Assume a cell with the following reaction Cu(s)+2Ag^+(1 10^ -3 M) Cu^ 2+ (0.250M)+2Ag(s) E^0_ cell =2.97V E_ cell for the above...
- Value of K_P for the equilibrium reaction N_2O_4(g) 2NO_2(g) at 288 K is 47.9 . The K_C for this reaction at same temperature is...
- If the standard molar enthalpy change for combustion of graphite powder is -2.48 10^2 kJ mol^ -1 , the amount of heat generated...
- A copper complex crystallising in a CCP lattice with a cell edge of 0.4518 nm has been revealed by employing X-ray diffraction...Not in JEE Main or NEET syllabus
- Number of electrons that Vanadium (Z = 23) has in p-orbitals is equal to ——
- N_2O_5(g) 2NO_2(g)+ 1 2 O_2(g) In the above first order reaction the initial concentration of N_2O_5 is 2.40 10^ -2 mol L^ -1 at...
- If the concentration of glucose (C_6H_ 12 O_6) in blood is 0.72 g L^ -1 , the molarity of glucose in blood is ——— 10^ -3 M....
- What is the correct sequence of reagents used for converting nitrobenzene into m-dibromobenzene ?
- Most suitable salt which can be used for efficient clotting of blood will be :-Not in JEE Main or NEET syllabus
- According to Bohr's atomic theory:- (A) Kinetic energy of electron is Z^2 n^2 (B) The product of velocity (v) of electron and...
- Match list - I and List - II. List-I: (a) R-C(=O)-Cl R-CHO (b) R-CH_2-COOH R-CH(Cl)-COOH (c) R-C(=O)-NH_2 R-NH_2 (d) R-C(=O)-CH_3...
- The calculated magnetic moments (spin only value) for species [FeCl_4]^ 2- , [Co(C_2O_4)_3]^ 3- and MnO_4^- respectively are :
- Match List-I with List-II : List-I (Salt): (a) LiCl (b) NaCl (c) RbCl (d) CsCl List-II (Flame colour wavelength): (i) 455.5 nm...Not in JEE Main or NEET syllabus
- Which one of the following carbonyl compounds cannot be prepared by addition of water on an alkyne in the presence of HgSO_4 and...
- In polymer Buna-S: 'S' stands for :-Not in JEE Main or NEET syllabus